How to grow cannabis outdoors in the UK
Can you grow cannabis outside in the uk? Yes you can. But growers in different parts of the UK face different challenges. A grower in the far north will face completely different challenges to a south coast grower. Some growers will be able to grow feminised outdoor seeds, whereas others will need to focus more on autoflower seeds. Dates of the last spring frost and the first winter frost vary from region to region, you will need to know yours. Local insect pests and threats from grazing animals also vary around the country. This practical guide explains how to grow cannabis in the UK and explains the month by month timeline for outdoor cannabis growers in the UK, boosting your chances of a successful harvest
What’s the legal status of growing cannabis in the UK?
Is it legal to grow cannabis in the UK? Cannabis is still regarded as a Category B drug in the UK, meaning it is illegal to grow, use or possess for recreational purposes. However in November 2018, UK Home Secretary Sajid Javid announced that cannabis would be legal for medical patients with an “exceptional clinical need”.
Since that point, however, only a handful of patients have been able to secure NHS prescriptions for medical cannabis. Private prescriptions can be made but these are too expensive for most people.
UK recreational and medical cannabis users are largely fatigued with the slow rate of change for UK laws compared to other countries in Europe and around the world. As a result, many UK cannabis users simply ignore the law and grow their own cannabis. A few well grown outdoor plants could provide a years worth of cannabis…
Which of these four types of climate do you live in?
The UK has a temperate oceanic climate, occupying mid-Atlantic latitudes from 49° to 61°N in western Europe. The close path of the jet stream ensures that the weather is changeable. The average annual rainfall is around 1.4 metres with around 130 rainy days each year. On the other hand, there are around 1500 hours of sun per year across the UK, thats around 4 hours per day on average. But which of the 4 main UK regions do you live in?
- South East: The South Eastern part of the UK can have cold, sharp winters, But summers can be sunny, dry and pleasant with plenty of warmth. Sometimes warm air masses from continental Europe can keep summers dry with occasional heat waves and 30ºC temperatures. Summers can also be grey and cool! South-east UK encompasses Norwich, Cambridge, Portsmouth and of course London. Growers in the South East find it possible to grow a wider range of feminised seeds than growers in Northern England.
- South-West: The South Western area of the UK often sees mild but wet winters. Summers are often warm but with plenty of Atlantic weather blowing in cloud and rain.The mild conditions allow a longer growing season than in possible in more northern regions. Includes South Wales, Cardiff, Exeter, Cornwall, Plymouth, Southern Wales etc. Just like South-East UK, growers in the South West will also find it possible to grow a wider range of later-finishing outdoor feminised strains than growers in northern England or Scotland.
- North-west: Cannabis growers in the north-west experience cool winters and summers which tend to be cooler and greyer than those further south. Prevailing Atlantic winds can bring rain and wind pretty much all year round. The North-Western region includes areas such as Northern Ireland, Northern Wales, and Western Scotland as well as areas like Greater Manchester, Merseyside etc. Growers in this region may find late season weather in September and October less friendly for growing slower blooming outdoor strains. Growers need to be selective about the feminised outdoor strains but will get good results with autoflower seeds.
- North East: Just like the North West, growers need to be mindful of climate limitations and the shorter grower season compared to growers in the warmer south. Winters can be cold, spring can be slow to arrive and the summer isn’t always as long as locals would like. Some outdoor feminised strains can be grown such as the tough Frisian Dew. But many outdoor growers also rely on autoflowers which can deliver guaranteed harvests even in shorter Scottish summers. The North East includes areas such as Yorkshire, Tyneside, Northumberland and Scotland.
What does your cannabis grow calendar look like?
It’s difficult to give precise guidelines for every city and grow location in the UK. But by generalising around the four main regions you may be able to get a rough idea of your local challenges. It may help you to conduct some internet research on weather specifics for your grow location, such as typical last frost dates in Spring etc.
What’s the best soil to grow cannabis in UK? If your local soil type is too poor (e.g. too sandy) then simply supplement it with supermarket soil and some grow additives – fish/blood/bone meal, rotted manure, worm castings, seaweed etc.
Many UK outdoor growers ignore January and February. But the good long reaching views and lack of leaves on trees, undergrowth and bushes can make this a great time to go scouting for possible future grow locations.
A winter walk along the river banks, through the fields and in the countryside can reveal promising future guerrilla grow locations which could be adapted to grow cannabis, UK winters have their uses!
One other useful activity at this time of year is the chance to dig the ground thoroughly. This allows you to remove any big roots, stones etc from the ground and it aerates the soil. You can also take the opportunity to dig in some well rotted manure, supermarket soil or soil improvers/fertilisers into the soil.
• Day length March 1st: 11 hours
• Average temperature: 3–10°C
March is often a time of excitement and anticipation for UK guerrilla growers. When growing cannabis, UK growers often want to germinate their seeds as early as possible.
It’s not unknown for the UK to have some great sunny and warm spring weather in March. This can lull UK growers into a false sense of optimism and cannabis seeds may be germinated a few weeks too early to be planted outdoors. Usually the time is better spent preparing your outdoor grow locations. Remember, several guerrilla grow plots are often preferred just in case you have bad luck at one of them. ‘Rippers’ (grow thieves) are a common threat, as are the nuisance of dog walkers and ramblers stumbling upon your grow.
Preparing the soil in your plot is one of the typical March activities. You may want to remove weeds and add some soil, compost or well rotted manure. If you add fresh manure, do it at the end of the previous growing season so it has time to be broken down by the soil over winter (otherwise it could burn the roots of your seedlings)
Greenhouse cannabis growers often use March to conduct a thorough greenhouse clean. Perhaps with a power washer to ensure the greenhouse is spotless. Clean the glass and remove debris to make it as clean as you can.
If you are lucky enough to be growing in areas like the Channel Islands you may want to germinate your cannabis seeds and consider an early start. But for most of the rest of the UK, it’s still a little too early to be germinating your cannabis seeds. However, if you have an indoor area to germinate your cannabis seeds and grow them under artificial lights, then this could be the time to get going. By germinating your feminised seeds (or autoflower seeds) early you give the seeds a head start and should have larger plants with heavier final yields.
But remember that you may not be planting your seedlings outdoors until May (or perhaps April in a greenhouse) so don’t rush and germinate your seeds too early at the first sign of a sunny day.
• Day length April 1st: 13 hours
• Average temperature: 5–13°C
April often heralds the start of Spring for many in the UK. Mini heatwaves in April are not unknown, though over-ambitious outdoor growers should note that snow fall and frosts are still commonplace for several weeks to come. Spring flowers are making the most of the longer daylight hours and warmer daily maximum temperatures.
Some growers, especially those in warmer southern regions, may be tempted to reach for their cannabis seed stash and germinate some seeds. Realistically however, most growers won’t want to risk putting their seedlings outdoors in April weather with the possibility of wintery showers always present. Instead, growers often keep their seedlings indoors (or in heated greenhouses/poly-tunnels) for a few weeks until the threat of bad weather has fully passed.
When growing cannabis, UK outdoor growers may also want companion plants nearby. These tend to attract helpful insects and deter pests. Peppermint, yarrow, coriander, and marigold may help in this respect.
• Day length May 1st: 15 hours
• Average temperature: 8–16°C
Warmer southern regions as well as coastal areas often see their last frost in early May. Further north, you may have to wait a few weeks longer before considering putting your plants outdoors. May is the month when many UK growers like to get their cannabis plants outside.
Your plants may have been indoors under artificial lights for several weeks. Allow them to gradually acclimatise to outdoor temperatures for a few hours each day. When you do plant them outside, you can place the plants directly in the earth or leave them in containers. When rooted directly in the soil the roots will have unlimited growth space and this can allow large plants 2-3m tall. Or you can leave the plants in containers, but this will mean you have to ensure sufficient water. Plants in containers can be moved in emergencies, even if they don’t produce quite the same large monster plants that can grow when rooted directly in the earth.
Hot weather is also possible in May, so greenhouse growers may want to ensure sufficient ventilation. Final plant health is heavily dependent on the soil and nutrition which you provide. If you can ensure a healthy living soil, perhaps with added mycorrhizal fungi and beneficial bacteria the plants will benefit.
Some growers, with an eye to the future, will consider a light top soil dressing of worm castings, compost, compost tea or seaweed just to ensure that future nutritional needs are met. Others will add some slow release organic nutrients such as BioTabs to the soil to ensure healthy future growth. You may also wish to get some less hardy companion plants such as Chamomile going to help deter pests later in the year.
Once your outdoor plants are in position, you should protect them. Some growers use chicken-wire (garden wire mesh fencing) around their plants to protect them from deer, rabbits etc. You can use tent pegs to pin down the fencing and stop rabbits getting underneath. The most determined UK cannabis growers will also plant a perimeter of thorny brambles around their plots to deter grazing animals, dog walkers, hikers etc.
For many growing cannabis, UK slugs and snails are a massive pest. Slug/snail pellets are often repeatedly applied around the plants in generous quantities to prevent your plants being decimated by them.
• Day length June 1st: 16.5 hours
• Average temperature: 11–19°C
The threat of frost has gone (apart from some Scottish areas) and summer has arrived. With long days, your plants should establish themselves and start to thrive.
Occasionally June can be very hot. You may need to check rainfall locally and for the next 2-3 months consider transporting water to your plants in the unlikely event of a persistent drought.
Be sure to remove any weeds and don’t be afraid to chop down surrounding vegetation which threatens to rob your plants of valuable sunlight. Re-applying a layer of mulch can deter weeds from getting established and it doesn’t harm to reapply slug/snail pellets.
Those growing cannabis in the UK may also consider LST (low stress training) for tying down particularly tall plants. June is a good time to start, before the plants get too large to easily manipulate.
• Day length July 1st: 16.5 hours
• Average temperature: 13–22°C
Growing cannabis in the UK is great fun in July. Warm sunny weather is in plentiful supply and you may want to keep an eye on rainfall. Usually UK rain is never far away, even in July, but in drought you may need to transport water to your plants if there has been a few dry weeks. The long sunny days are ideal for cannabis. Growth above and below ground is in full flow.
Greenhouse cannabis growers may see 30ºC temperatures. Ensuring sufficient water is vital. Check for signs of pest infestation and also check for nutrient deficiencies. If you are growing in good quality, moist, nutritious soil then you shouldn’t see any issues. But it never does any harm to continually monitor the health of your plants.
One useful tip for those growing cannabis in the UK countryside is to avoid making a clear and obvious track to your plant location. This may simply encourage curious walkers to wonder why a new trail has emerged. Instead, it can be wiser to visit your outdoor grow location only when necessary. If possible, you may also wish to have different approach routes to your grow location to minimise the chance of creating an obvious pathway.
Some outdoor growers like to try to control surrounding vegetation throughout the summer. In particular they like to stop nearby trees and bushes from taking sunlight from their cannabis plants. Outdoor pests such as aphids, whitefly etc can be a nuisance though they can be tackled with traditional methods as well as predatory insects (ladybirds etc).
If you had good weather and planted your autoflower seeds early enough, you may be able to harvest your first autos in July.
• Day length August 1st: 15.5 hours
• Average temperature: 13–21°C
As August progresses, daylight hours and temperatures start to drop. The cannabis plant senses the reducing daylight hours and you may notice your photoperiod feminised plants are in bloom.
Autoflower plants are often ready to harvest around August. Many autoflower growers feel that they get particularly potent harvests since their buds are able to ripen under full summer sunlight.
Many that grow cannabis outdoors in the UK have found autoflower seeds are a great way to complement their normal photoperiod crop. What’s more, the autoflower harvest is much more likely to succeed since the mid summer weather is significantly more reliable than the weather in late September or early October.
Many that grow cannabis in the UK like to add extra nutrition in August to allow for a healthy bloom process. Seaweed fertilisers are popular, so is fish/blood/bone meal, worm castings etc. But if your soil is good quality it may not be absolutely necessary to add extra nutrients.
Humidity can be an issue when buds are starting to develop, but there is little that you can easily do to control it. Just ensure that you are selecting good quality outdoor cannabis seeds with reasonable resistance to mold. It also helps to select grow sites that have plenty of direct sunlight, especially early in the day. This helps drive away excess moisture from the plants and minimise mold/bud rot issues.
• Day length September 1st: 13.5 hours
• Average temperature: 11–18°C
Especially in the north, wet and windy weather is already becoming more and more common place. Many that grow cannabis in the UK find September and October to be the most critical months.
A few weeks of good weather at this time of the year can be the difference between success and failure for crops of outdoor feminised photoperiod strains. Most autoflower strains have already been harvested, but photoperiod outdoor strains will still be building their terpene profile and fattening up the buds.
Some southern growers will be able to harvest their photoperiod plants in September. Northern growers may need to wait a few more nervous weeks and hope the October weather stays good enough.
• Day length October 1st: 11.5 hours
• Average temperature: 8–14°C
October usually marks the end of the growing season unless the country has got lucky with a rare ‘Indian summer’ (which means a particularly warm Autumn/Fall). October weather is often cold, wet and windy.
Hopefully you didn’t choose any late blooming Haze genetics! Most growers like to get the plants harvested during October before the weather really goes downhill.
Growers in Scotland and the far north will be mindful of the first winter frosts arriving. Mold and bud rot are a constant threat and there are no guarantees of successful harvests at this late stage in the season. Strain selection is particularly important for outdoor growers in countries with UK-like weather.
If outdoor photoperiod feminised seeds are simply too risky in your specific climate then consider focussing more on autoflower seeds. In the UK, most autoflower seeds grow from seed to harvest outdoors in around 100-110 days. This is slower than indoor auto growing due to the weather, temperatures and reduced light hours. Autoflower seeds also tend to remain around a metre tall, making them easier to hide than some of the 3m tall photoperiod strains.
• Day length November 1st: 9 hours
• Average temperature 4-10ºC
If you get lucky with a warm dry autumn in Southern UK you may still be able to harvest some late blooming plants. Of course there are no weather guarantees so late in the UK outdoor season.
But if the weather hasn’t deteriorated too much, and perhaps with the aid of some shelter (e.g. a glass roof) it may be possible for some lucky southern UK growers to harvest something.
Failing that, November could be a month to tidy up your outdoor grow locations for the following year. You may want to dig in some manure ready for the following grow season
• Day length December 1st: 8 hours
• Average temperature: 2-7ºC
December is a good month to go scouting for possible new grow plots. The lack of vegetation and leaves make it easier to survey the landscape for possible secure grow locations. It’s also a great month to kick back, relax and enjoy the harvest which should be nicely dried and cured!
Growing photoperiod vs autoflower cannabis in the UK
Cannabis seeds that grow in uk climate need to finish inside the short growing season. One of the main challenges for those growing cannabis in the UK is selecting strains that will finish in time. If you want to grow cannabis outdoors, UK growers can choose between autoflower seeds and photoperiod feminised cannabis seeds.
How to grow autoflowering cannabis in UK? Autoflower seeds have a faster growth cycle and they remain shorter (around 1m tall) than photoperiod feminised strains. But autoflower seeds also tend to yield a little less, which is natural since they have a shorter growing cycle.
Photoperiod feminised seeds tend to take 5-6 months to complete their outdoor grow cycle. This means that you may not be harvesting until the changeable October weather arrives. But you will often have larger plants and heavier harvests.
The shorter your grow season, the more that autoflower seeds will appeal. Many outdoor cannabis growers in the UK have several grow locations and use a mix of autoflower seeds and feminised seeds. Some northern growers prefer to avoid the risk and worry of photoperiod feminised seeds and grow autoflower seeds instead. Often they will have staggered start dates for their auto plants so they are harvesting gradually throughout the summer.
Many UK outdoor cannabis growers will germinate their cannabis seeds indoors and give them the first few weeks under artificial indoor light, e.g. 18-20 hours per day. They do this regardless of whether the seeds are autoflower seeds or feminised seeds. By giving the seedlings indoor light for the first few weeks the plants get the best possible start and avoid the threats of outdoor weather/pests while they are at their most vulnerable.
How many cannabis plants can i grow in UK?
How many cannabis plants can i grow in UK? Unless you have a licence to grow cannabis in the UK, then you can’t legally grow any. Grow your own cannabis in the UK and you are in breach of the law.
However, if you are growing a few plants outdoors the Police are unlikely to ever be able to link plants to any specific grower. They don’t have the resources for 24 hour surveillance for a small plot of autoflower plants.
Most outdoor growers don’t worry about the legal aspects of growing.
What are the best cannabis seeds for the UK climate?
How to grow cannabis outdoors in the UK? You will need good local knowledge of your climate, first frost dates etc. It also helps if you have some prior knowledge of which strains will grow well at your latitude/location. In climates like the South East and South West you should be able to grow photoperiod strains like Frisian Dew and perhaps other strains too.
Some, but not all, of the Dutch Passion outdoor seed collection can be grow in the UK. But much depends on the specific climate in your region. A lot also depends on the specific year you choose to grow in. Some years (admittedly not many of them) have long warm autumns which will allow growers in Northern regions to grow a selection of outdoor feminised strains such as Frisian Dew, Hollands Hope, Durban Poison, Shaman, Passion #1.
But the UK weather is so changeable that you may be able to finish blooming a particular strain one year but not the next. UK cannabis growers simply can’t rely on the weather in the way that growers in warmer countries can. That’s also the same reason why cannabis seed companies just can’t guarantee results from their strains.
That’s why growing autoflower seeds has become so popular with UK growers. The seeds should always finish in time. Yields from autos may be smaller (than photoperiod strains) but the plants are fast and easy to grow. They also tend to remain short and bushy – ideal for hiding behind bushes, nettles and plant life.
The following strain suggestions may be useful for UK growers:
Frisian Dew. A solid, proven photoperiod feminised outdoor strain which grows well in UK conditions. She is usually ready to harvest in early October. Grows well as far north as Northern England. Can finish bloom further north in mild autumns. One of the preferred and most recommended strains for growing cannabis in UK.
Durban Poison. Perhaps better suited to South East and South West regions in order to finish in time. This is another proven outdoor photoperiod feminised strain which grows well outdoors. Durban Poison seeds are part of the Dutch Outdoor seed collection. This is well worth browsing, all the strains in this collection grow well at Dutch (and similar) latitudes.
Frisian Duck. With the unique leaf shape Frisian Duck seeds are ideal for outdoor growers wanting a stealthy, self-camouflaging photoperiod feminised outdoor strain. Also available in autoflower seeds as Auto Duck.
Auto Mazar. This tough and resilient auto grows well in UK conditions. Outdoors she takes around 100-110 days to finish and grows well throughout the UK. It’s worth adding that any of the Dutch Passion autoflower seeds collection should be able to grow and finish inside even a short northern UK summer.
Auto Banana Blaze. This tough Afghani Kush autoflower seed produces heavy harvests with a unique sweet banana taste. Give her a good summer and she can really deliver heavy harvests. A solid and reliable autoflower for growing cannabis in the UK. Part of the Afghani Kush seed collection.
Growing cannabis in the UK really is easy
The diverse, changeable and unpredictable weather can mean that no two UK grow seasons are exactly the same. That can make it difficult to have a preferred strain which will always deliver, year in year out.
Understanding the limits of the grow season at various UK latitudes and locations is your starting point. From there, you should be able to grow autoflower seeds outdoors no matter where you are in the UK.
Many in more southerly locations will also be able to finish blooming photoperiod feminised outdoor strains too, though there are no guarantees particularly north of the Scottish border. Whatever you choose to grow, good luck and choose your cannabis seeds wisely!
2022 Calendar for outdoor marijuana growing in Europe
⭐ CALENDAR 2022 FOR OUTDOOR/NORTHERN EUROPEAN CROPS
Tired of this climate so cold and desiring to grow marijuana in your garden?
Old Europe is multicultural, tolerant and open-minded, but its climate is cold and even more in the northern half of the continent.
The outdoor growing season doesn’t start until May, but there are a lot of things to prepare before starting to germinate the seeds, so, get comfortable, since in this guide I will teach you on what you must do month by month so that when the time comes you are ready to start a succesful crop and get the best results.
With the 2022 outdoor growing calendar you will learn, among other things, the average duration of the days and the average temperatures in the northern half of Europe.
You will also see that data from the city of Reykjavik in Iceland. A cold country where it rains a lot but in spring and summer has many hours of sunshine, with the necessary information you are able to grow marijuana outdoors there too.
Relevant facts you should know:
- 1- The average temperature and daylight hours are based on the following cities: London, Paris and Bern.
- 2- The Atlantic Climate is more rainy than the Continental climate. In our catalogue you have seeds suitable for growing in damp places
- 3- Although it is not mandatory for outdoor growing, if you want to optimize the time and prolong the growing cycle, I recommend you to take a space for indoor growing to germinate your seeds, cultivate your seedlings, and even maintain mother plants and supply yourself with your own cuttings.
There are many possibilities if you have a ventilated, safe and controlled environment. For plants to be always growing you must have them under a 200w low energy bulb with growth spectrum, for example the Hortilight 200w growth bulb with a photoperiod of 18/6. Plants will continue to grow indefinitely and you can take them outdoors when the weather is adequate.
You have the option to:
- –Grow indoors and taking the plants outdoor to bloom.
*Move them to outdoor at the beginning of spring, although the hours of light are increasing, are still few, so the plant will begin to bloom.
At this time it’s necessary to pay special attention to the moment of moving, if it is too late plants may start a revegetative period, and this would lengthen their development phase, delaying the harvest considerably.
*Move them at the end of summer, when the hours of light go backwards and the plant starts to bloom immediately.
- –Grow indoors and taking the plants outdoor to continue growing.
*Germinate seeds and keep the seedlings until they are safe from the cold. In springtime the plants are ready to move outdoors and continue growing without problems. Adjusting the artificial light to the outdoor sunlight hours will make the change less traumatic.
*Move the plants to the end of June, which is the natural period with the most hours of light, so you will not have the problem of premature flowering. They will continue to grow for a few weeks more before flowering.
Of course all this information is useful for seasonal cannabis plants, if you grow autoflowering strains you will not have to worry about this, since these do not depend on the photoperiod to flower and the hours of light are not a determining factor in this type of cultivars, regarding their growth and flower production.
In short, we go month by month with all the data highlighting what you can do to get a satisfactory harvest.
Average day duration : 8 hours 18 minutes to 9 hours 20 minutes.
Average temperature: 8ºC to 2ºC.
Average day duration: 4 hours 20 minutes to 6 hours 47 minutes.
Average temperature: 2ºC to -2ºC.
This month is very cold on the continent. The best thing you can do is to rest and think about how to prepare your next crop. Surely you’re enjoying the weed you grew last year; and what a better plan than browse our blog and learn all the details about the art of outdoor marijuana growing, there’s always something new to learn.
If you have an indoor growing cabinet and are not using it, you must get it ready since are going to start using very soon.
Learn all the details about the art of outdoor growing
Average day duration: From 9 hours 21 minutes to 10 hours 50 minutes
Average temperature: 9ºC to 2ºC.
Average day duration: 6 hours 53 minutes to 9 hours 49 minutes
Average temperature: 2 degrees to -2 degrees
The cold in the form of snow and rain is still present in northern Europe, in places like Paris and Bern the winter never let up.
If you have a fresh and ventilated indoor crop, you can already think about germination of the seeds, at first, in darkness and when the first 3-pointed leaves appear it is time to put them under artificial light, being the ideal temperature between 20 and 26Cº with the lights on.
You can start with a low energy lamp of 200w of growth spectrum, putting under a light bulb of more power when the plants are stronger.
If you live in a Nordic country or Iceland you’ll have to wait a little longer, in the rest of Northern European countries at the end of this month you can be preparing the soil, removing the ice, tilling the soil correctly. Adding bat guano or worm humus provides essential nutrients to develop strong and vigorous marijuana plants.
You can already think about germination of the seeds
Average day duration: From 10 hours 53 minutes to 12 hours 40 minutes
Average temperature : 12ºC to 4ºC.
Average day duration: 9 hours 55 minutes to 13 hours 11 minutes
Average temperature: 3 degrees to -1 degrees.
The days are getting longer and the temperature is getting higher, this is just what marijuana plants need to develop strongly and healthy.
The coasts of the UK and France bathed by the Atlantic Ocean are beginning to warm up, and little time left to start the growing marijuana season.
If you haven’t bought the seeds, now is the time. Growers of these latitudes usually prefer to cultivate Indica strains due to their short flowering cycle, is a good time for you to decide the genetics that best suits your needs.
If you have a mother plant, you may prepare it, since at the end of next month is the ideal time to make the first cuttings.
By the end of the month you can germinate the seeds, although most of the northern part of the continent does not have enough sunlight and it is still cold most time of the day; You can always put the cuttings under a lamp for a few extra hours each day and thus prevent them from start flowering too early.
Growers of these latitudes usually prefer to cultivate Indica varieties for its short flowering cycle.
Average day duration: From 12 hours 45 minutes to 14 hours 25 minutes
Average temperature: 16ºC to 5ºC.
Average day duration: 13 hours 18 minutes to 16 hours 30 minutes
Average temperature: 6 degrees to 1 degrees.
We are finally in spring, there are more and more hours of light and after the first fortnight the days are at least 14 hours. Once the days are quite long you don’t need any more artificial light, unless you live in an area where it’s still very cold and you prefer to take the plants outdoor later.
At the end of this month, in almost all northern European countries it is safe to take the plants outdoors, but perhaps it’s convenient to put them in the night in order to not end up frozen, since nighttime temperatures are still low.
If you live in Iceland you will have to wait a few more weeks to grow outdoors unless you have a greenhouse to protect the plants from the cold letting you to take advantage of the amount of daylight hours in spring and summer.
If you want to know how to build a homemade greenhouse: Propagation cuttings Marijuana
If you have a mother plant may cut and remove the clones, if you want to know the best technique to do that easily please read this post.
How to make marijuana cuttings. Image source: Buddha Genetics
Average day duration: From 14 hours 28 minutes to 15 hours 48 minutes
Average temperature: 19ºC to 8ºC.
Average day duration: 16 hours 36 minutes to 19 hours 49 minutes
Average temperature: 9ºC to 4ºC.
We are already at the equator of spring and you can see that, even if you live in Iceland and want to grow outdoors you have a chance to do so if you take into account the night frosts.
If you grow in Iceland or in some Nordic country, you must take into account the growing of autoflowering strains, these are plants that have a whole vegetative cycle of 3 months, being in these countries , more or less, the proper time you have to get a good harvest until the frost returns at the end of August.
The autoflowering varieties have a growing cycle of 3 months
Average day duration: From 15 hours 50 minutes to 16 hours 09 minutes
Average temperature: 22ºC to 11ºC.
Average day duration: 19 hours 54 minutes to 21 hours 01 minutes
Average temperature: 12ºC to 7ºC.
Summer begins in the northern hemisphere, outdoor plants will develop strongly this month. Both feminized and autoflowering plants grow vigorously at high temperatures and with the large amount of light they receive.
June 21st is the summer solstice, the longest day of the year.
If you live in an alpine climate maybe you still keep the plants indoors, now is the time to take them out and let them grow for another month to start flowering. You won’t have any early flowering problems.
Plants grown outdoors will develop strongly this month
Average day duration: From 16 hours 08 minutes to 15 hours 15 minutes
Average temperature: 25ºC to 13ºC.
Average day duration: 20 hours 57 minutes to 18 hours 19 minutes
Average temperature: 13ºC to 8ºC.
This month and next month, they are the hottest of the year, this is noticeable in the plants.
If you have grown autoflowering seeds, possibly they may already have a good amount of buds.
If you have grown feminized strains then your plants will start to have the first pistiles. On the other hand, if you have opted for regular seeds now is the time to identify male plants, two months after germination is when marijuana shows its sexual character.
two months after germination is when marijuana shows its sexual character.
Average day duration: 15 hours 12 minutes to 13 hours 31 minutes
Average temperature: 25ºC to 13ºC.
Average day duration: 18 hours 12 minutes to 14 hours 55 minutes
Average temperature: 13ºC to 8ºC.
It’s time to harvest the autoflowering plants from the seeds you germinated in May.
You’ll have to peel and trim the flowers putting the branches upside down in a dry, dark place. In 10-12 days after harvest they will be ready to store and let cure. In that moment the buds will be suitable to be consumed.
Do you want to know how to make a drying box at home?
At the end of this month most northern European countries have less than 14 hours of daylight. Iceland is the exception. When this happens, the annual marijuana plants (feminized and regular) will begin the last flowering phase.
Average day duration: From 13 hours 34 minutes to 11 hours 52 minutes
Average temperature: 22ºC to 11ºC.
Average day duration: 14 hours 49 minutes to 11 hours 41 minutes
Average temperature: 10ºC to 5ºC.
If you are growing feminized plants, during this month you will see how they begin to develop more pistils, trichomes and buds. It is important to make sure that during this period the plants remain dry, putting them under cover can save you a lot of headaches. If necessary, protect them and place tutors on the heaviest branches, in this month the weather is changing and you don’t want to throw away the effort made on the whole season.
Autumn begins on the 23rd this year, although the solar transition is slower in the Nordic countries and Iceland.
Average day duration: From 11 hours 48 minutes to 10 hours 04 minutes
Average temperature: 18ºC to 9ºC.
Average day duration: 11 hours 36 minutes to 8 hours 21 minutes
Average temperature: 6ºC to 2ºC
Autumn has just begun and many outdoor plants are showing their buds. If you live on the west coast of France, UK or Norway you know that the rains are abundant so you have to watch out for the flowers rotting.
In light of the appearance of a fungus plague, it’s better to harvest as soon as possible, since fungi spread easily and the marijuana can become contaminated and useless.
Rains are plentiful, so you have to watch out for the rotting of the flowers.
Average day duration: 10 hours 01 minutes to 8 hours 40 minutes
Average temperature: 11ºC to 5ºC
Average day duration: 8 hours 15 minutes to 5 hours 18 minutes
Average temperature: 3ºC to 0ºC.
Only the bravest grow cannabis outdoors this month; If you have a greenhouse and chose a sativa strain you may be about to harvest.
One of the most important tasks is drying and manicuring correctly the marijuana for later conservation. The quality of the weed you harvest drops drastically if you don’t take care of this process.
Average day duration: From 8 hours 39 minutes to 8 hours 17 minutes
Average temperature: 8ºC to 3ºC.
Average day duration: 5 hours 13 minutes to 4 hours 16 minutes
Average temperature: 2ºC to -2ºC.
It’s very cold, and in countries like Iceland there is hardly 4 hours of light. What a better time to watch a movie completely stoned, read a good book or have a conversation with friends. It’s time to enjoy the job well done.
✨ Infographic calendar 2022 outdoor cultivation in Europe
Here you have a complete infographic that summarizes this calendar 2022 for outdoor cultivation in Northern and Southern Europe.
Infographic calendar 2022 outdoor cultivation in Europe
✅ CALENDAR FOR OUTDOOR MARIJUANA GROWING 2022 /SOUTHERN EUROPE
Are you Impatient to start the outdoor marijuana season? It’s normal, All we are, with this Calendar 2022 for growing marijuana outdoors in southern Europe you will know all the details to get an abundant harvest with the best guarantees.
The temperature in this zone of the continent is warm and mild, although there are months of the year that due to the number of daylight hours and low temperature is better to have a rest.
With this calendar you will know the average duration of daylight hours and average temperatures in the southern half of Europe.
You will also know this information about the city of Santa Cruz de Tenerife (Spain), one of the most meridional cities in the continent.
Relevant facts you should know:
- 1- The average temperature and the daylight hours data are based on the following cities: Lisbon, Marseille and Genoa.
- 2- The Mediterranean Climate is the ideal climate to grow all types of strains thanks to its warm and mild temperature, in dry climates it is preferable to grow Afghan genetics; although if you grow them in a warm but humid climate then the strains such as Thai, Hawaiian and Brazilian descendants are the most suitable for you.
- 3- If you have the possibility, it’s always interesting to have a growing space indoors and thus start the season earlier. If you have a growing cabinet with artificial light, you may germinate your seeds and let your plants growing (photo-period of 18/6) until the climate in your garden becomes milder. This will make you get bigger and more productive plants, because those weeks ahead are noticeable.
Now we go month by month with all data and information:
Average day duration: From 9 hours 01 minutes to 9 hours 48 minutes
Average temperature: From 12ºC to 3ºC.
Santa cruz de Tenerife:
Average day duration: 10 hours 21 minutes to 10 hours 47 minutes
Average temperature: 22ºC to 13ºC.
It’s still too early to think about growing outdoors in southern Europe, it’s a good time to enjoy the weed harvest in the last season and think about the next one.
As it’s always a good time to learn, you can take a look at our blog and enjoy the dictionary on marijuana, all the related plant terms we are so passionate about.
Although if you live in Tenerife the story is different, the Canary Islands have a subtropical climate with the exception of some island cities with a colder microclimate; Growers in the Canary Islands can grow up to 3 outdoor crops a year naturally with feminized and regular strains, and up to 4 crops a year if the seeds the use are autoflowering.
If you live in Tenerife, you can prepare the soil and fertilize it with earthworm humus and start the first crop (winter-spring), the feminized strains in this climate complete their growing cycle in 3 or 4 months.
Prepare the soil and fertilize it with earthworm humus
Average day duration: From 9 hours 50 minutes to 11 hours 02 minutes
Average temperature: From 13ºC to 3ºC.
Santa cruz de Tenerife:
Average day duration: 10 hours 49 minutes to 11 hours 30 minutes
Average temperature: 22ºC to 13ºC.
You may already think about buying the seeds, there is still little probabilbity of frost, especially in countries bathed by the Mediterranean sea.
If you live in Spain, Greece, Italy, Portugal or some other temperate climate country you can grow both Indica or Sativa strains, as you prefer, this is because you live in a privileged climate, with mild temperatures, given that the amount of daylight hours received by the plants is high.
If you already have the seeds and a mini greenhouse available, you may start germinating them and then remove the seedlings when the temperature is higher and the days are longer, this way you will gain valuable time.
Average day duration: From 11 hours 05 minutes to 12 hours 34 minutes
Average temperature: From 16ºC to 5ºC.
Santa cruz de Tenerife:
Average day duration: 11 hours 32 minutes to 12 hours 22 minutes
Average temperature: 23ºC to 14ºC.
In cities like Marseille or Genoa, spring is beginning to be felt, the days are longer and the risk of frost is almost nil. If you already have the seeds you may begin to germinate them, remember that the seedlings need to receive at least 12 hours of sunlight, if the days are not long enough you can always put the plants in the indoor under the lamp of a growth spectrum for an hour, thus avoiding premature flowering.
If you have a mother plant, you may prepare it to be cloned, since at the end of this month you may start making the first cuttings in order to take them outdoors
This month you can start making the first cuttings
Average day duration: 12 hours 37 minutes to 13 hours 59 minutes
Average temperature: From 19ºC to 8ºC
Santa cruz de Tenerife:
Average day duration: 12 hours 24 minutes to 13 hours 40 minutes
Average temperature: 24ºC to 14ºC
In April the temperature rises and the daylight hours are significantly more numerous . You no longer need artificial light, and your seeds will germinate and grow quickly once put in the pots.
In some mountain climates it will be necessary to put the plants indoor at night so that they do not freeze.
If you live in Santa Cruz de Tenerife, the plants you have grown in January are ready to harvest, and it’s time to begin the second outdoor harvest in the Canary Islands (spring-summer), this usually ends in August/September depending on the characteristics of the strain.
It is convenient to put the plants in at night so that they do not freeze.
Average day duration: From 14 hours 02 minutes to 15 hours 06 minutes
Average temperature: From 23ºC to 13ºC.
Santa cruz de Tenerife:
Average day duration: 13 hours 13 minutes to 13 hours 47 minutes
Average temperature: 25ºC to 15ºC.
Outdoor plants this month are vogorous as a result of longer days and higher temperatures. In cities like Malaga, Athens or Malta the summer is coming and you’ll see people wearing T-shirts walking along the promenades.
If you like autoflowering strains, it’s a good month to grow them since you have the 3 warmest months with the most numerous of daylight hours of the year ahead.
A good month to grow autoflowering varieties
Average duration of daylight hours: From 15 hours 08 minutes to 15 hours 23 minutes
Average temperature of the month: From 28ºC to 14ºC
Santa cruz de Tenerife:
Average day duration: 13 hours 49 minutes to 13 hours 56 minutes
Average temperature: 27ºC to 17ºC.
Summer is here officially, we are sure you will be aware of it, it gets dark later and in many southern European countries you no longer need a blanket to sleep.
Seasonal and autoflowering marijuana plants grow vigorously due to the high temperatures and the large amount of daylight they receive.
June 21st is the longest day of the year and this means that the week of June 18th to 24th is the time in which your plants will experience the greatest growth. You’ll notice a considerable increase in the height, quantity and size of their leaves.
Your plants increase their height considerably during this month
Average day duration: From 15 hours 22 minutes to 14 hours 39 minutes
Average temperature of the month: From 31ºC to 17ºC.
Santa cruz de Tenerife:
Average day duration: 13 hours 56 minutes to 13 hours 33 minutes
Average temperature: 29ºC to 18ºC.
This month and next month are the warmest of the year and that is perceived in the plant development.
If you grew autoflowering seeds in May, the plants will be full of buds and almost ready to harvest.
If you grew feminized strains then your plants will start to have their first pistiles, and if you work with regular seeds, now is the time to identify male plants, accurately two months after germination is when marijuana shows its sexual character.
Two months after germination is when marijuana shows its sexual character.
If you live in Santa Cruz de Tenerife, you may grow this month, for example, a 100% sativa marijuana plant, and in less than 5 months it will be ready to harvest. This is unthinkable for outdoor crops in continental Europe.
Average day duration: From 14 hours 39 minutes to 13 hours 35 minutes
Average temperature: From 31ºC to 17ºC.
Santa cruz de Tenerife:
Average day duration: 13 hours 32 minutes to 12 hours 49 minutes
Average temperature: 30ºC to 19ºC.
It’s time to harvest the autoflowering plants that you germinated in May.
You’ll have to peel and trim the flowers and put the branches upside down in a dry, dark place. In 10-12 days after harvesting the buds will be ready to be stored in glass jars (the first month it is good to open the jar for 1 hour a week) in a space without sunlight, for optimal preservation. You can also freeze the buds, these will keep the properties intact.
At the end of this month, most European countries have less than 14 hours of daylight, even in the Canary Islands.
Average day duration: From 13 hours 30 minutes to 11 hours 54 minutes
Average temperature: From 26ºC to 14ºC.
Santa cruz de Tenerife:
Average day duration: 12 hours 47 minutes to 11 hours 59 minutes
Average temperature: 29ºC to 20ºC
If you grew feminized or regular strains of Indica phenotype, at the end of this month those plants may be ready to harvest, you will note that the buds are getting larger and bigger, and gradually becoming full of aromatic trichomes. It’s important to make sure that during this period the plants remain dry, putting them under cover can save you a lot of humidity problems. If necessary, protect them and place tutors on the heaviest branches. In cities like Marseille or Lisbon the weather is changing this month and you don’t want to throw away the effort made on the whole season
The first week of this month is time to harvest the second outdoor crop in Santa Cruz de Tenerife (Spring/Autumn), and begin the third and final growing season (autumn/winter).
Average day duration: 11 hours 51 minutes to 10 hours 26 minutes
Average temperature of the month: From 21ºC to 11ºC..
Santa cruz de Tenerife:
Average day duration: 11 hours 57 minutes to 11 hours 09 minutes
Average temperature: 27ºC to 19ºC.
Autumn has arrived and many plants show their fruits to be harvest, and marijuana is no the exception. It’s necessary to be especially careful with the rains since an excess of humidity can cause the appearance of fungi, and consequently, the rotting of the buds.
the rotting of the buds
Seasonal (non-autoflowering) marijuana plants of mainly sativa phenotype will be ready to harvest by the middle/end of this month.
One of the most important tasks is drying and manicuring the marijuana for later conservation. Quality can be affected if we do not take good care of this process.
Average day duration: 10 hours 23 minutes to 9 hours 17 minutes
Average temperature of the month: From 16ºC to 6ºC.
Santa cruz de Tenerife:
Average day duration: 11 hours 07 minutes to 10 hours 31 minutes
Average temperature: 25ºC to 17ºC.
If you grew a cannabis landrace strain, such as a pure Haze, it will be ready to harvest this month, since it’s time to reap the fruits of your effort; 14-16 weeks of flowering is definitely worth it.
At night it starts to cool down so if you have the chance to put them under cover it’s the best thing you can do.
At the end of this month or early December, in Santa Cruz de Tenerife, it’s time to harvest the last crop of the year (autumn-winter), the feminized seeds that you germinated in September. Although they will not have become very large plants, on the contrary, since they do not usually exceed one and a half meters in height. The quality of the weed obtained cannot be compared to that grown in another climate.
Here, we have the result of our labor, our beautiful girls.
Average day duration: 9 hours 17 minutes to 9 hours 01 minutes
Average temperature of the month: From 12ºC to 3ºC.
Santa cruz de Tenerife:
Average day duration: 10 hours 30 minutes to 10 hours 22 minutes
Average temperature: 23ºC to 15ºC.
It’s cold and it’s Christmas season, time to enjoy the family, and of course, the marijuana that we have grown this season; If the preservation has been correct, a month of marijuana curing has made your weed crunchy and perfect to smoke.
To free your mind, I advise you to read our post on movies and documentaries about cannabis, with which you will surely enjoy and laugh a lot.
Read our post on movies and documentaries about cannabis
I will be delighted to read your comments and suggestions, together we may shape the best Calendar for outdoor marijuana growing in Europe
When is the best time to plant cannabis outdoors?
A number of states now allow cannabis cultivation for adult use, and even more states allow cannabis cultivation for medical purposes.
The increase in cultivation reform has resulted in a rise in interest in growing cannabis among cannabis consumers.
Cultivating cannabis can be one of the most rewarding activities that a person can do, and with a pleasant reward at the end of all the hard work (assuming the cannabis is grown right).
If you are thinking about cultivating cannabis, one of the first things you will need to determine is whether to cultivate cannabis inside or outdoors.
Why cultivating cannabis outdoors can be better than growing indoors
Cultivating cannabis outside has the following advantages over cultivating cannabis indoors:
- Reduced equipment costs
- No increased electricity bill
- Larger harvest
- Lower carbon footprint
- Often easier to incorporate organic cultivation methods
- Cheaper nutrient/input costs
Growing cannabis indoors has its benefits too, but for people that want a lower maintenance garden, cultivating cannabis outside is the way to go.
An obvious question – when is the best time to plant cannabis outdoors?
One of the first things that a grower needs to determine when planning a sun-grown garden is when to put plants into the ground.
A one-size-fits-all approach does not work. A number of factors are involved:
- What is the latitude of where the garden will be located
- What is the altitude of where the garden will be located
- What is the precipitation level where the garden will be located
- What will the temperature be like while the plant is in the ground
Ultimately what a grower needs to try to avoid is planting the plant(s) too early in the year, which could result in the plants dying due to the soil/air being too cold.
Also, the grower needs to avoid planting the plants too late in the season so to ensure that the plant(s) has enough time to go through a full growth cycle.
Generally speaking, you want to plant your plants in the ground outside in early to mid-May, similar to when it’s recommended to plant tomatoes.
Tomatoes do not grow exactly like cannabis, but for planting purposes, they are almost identical. With that being said, each part of the country is different.
A great resource to look up the recommended planting date for where you live is the Farmer’s Almanac.
Simply enter your location and it will tell you when is the best time to plant tomatoes outside, which can double as the date for when to plant your cannabis too.
Getting started ahead of time is key
If you are growing from seed, you will want to germinate the seeds at least 6-8 weeks before planting.
A way to cut down on the prep time is to use a clone if you are able to. Clones are often harder to find than seeds. Each route provides its own advantages.
Growers can get a head start by letting their plant grow indoors for a few weeks prior to putting them inside. This obviously requires a greenhouse or indoor garden.
By allowing your plant to grow in a controlled environment while the air and soil outside is warming up, you give your plant some additional growth time, resulting in a larger plant.
Other tips that can help
If you live in an area where the warm season is shorter than in other parts of the world, there are two tricks that can really help.
The first is growing your cannabis plant in a container rather than planting it into the ground.
This allows you to move your plant to the most favorable parts of your yard to get the most sunlight as the season goes along.
Putting your plant in a container also allows you to bring the plant in at night when the temperature drops below a desirable threshold.
The second tip is using a concept known as light deprivation, or ‘light dep.’ This method involves cutting back on the sunlight time that a plant receives by cover the plant up after 12 hours of sun.
It’s a tricky method that requires using a tarp over a greenhouse or building a box that can go over your plant.
When you first plant your cannabis plant outside, the amount of daylight at that time is usually around 14 hours.
As the season goes along, and your plant is big enough, you can cap the amount of light it is exposed to at 12 hours and your plant will start to bloom faster than it normally would, thereby helping your harvest come sooner.