Best cannabis seeds to grow outside uk

Top 10 best outdoor cannabis seeds UK

The UK, despite being at the northern European boundary of cannabis cultivation territory, has thousands of successful outdoor cannabis growers. You can grow both autoflower seeds as well as photoperiod outdoor strains in the UK and expect solid results with the right seeds. One of your main challenges, depending on your precise grow location within the UK, is selecting strains which will finish in time and give high potency results.

This Dutch Passion guide to the 10 best outdoor cannabis seeds for the UK will also offer some useful tips and tricks to maximise your chances of a successful harvest.

Cannabis growing climate in the UK

An outdoor cannabis grower on the English south coast will face a different set of challenges to a grower in Scotland. The UK has a variable and an unpredictable climate. Some growers will be able to fully bloom a photoperiod outdoor strain such as Frisian Dew, whereas guerrilla growers further north may be better advised to stick to autoflower strains which are faster to finish and perhaps more likely to deliver a harvest.

Conditions, temperatures and light hours vary from one UK location to the next. The following table gives an approximate guide to the environment facing many UK growers through the summer months. Note that these are just approximate averages, each UK growing season can show surprising levels of variation from year to year and also from region to region. This presents some genuine challenges to UK outdoor growers.

Month Max. temperature C°(F°) Min. Temperature C°(F°) Sunlight Rel. Humidity
June 19 (66) 10 (50) 16hs 75%
Jul 20 (68) 12 (54) 16:30hs 69%
Aug 20 (68) 11 (52) 16hs 72%
Sep 17 (63) 9.5 (49) 14hs 76%

On top of the regional environmental variations are the normal climatic variations. Some years can produce great growing conditions with long, sunny autumns (fall).

Other years can see the UK summer replaced with a few months of cold, damp and overcast conditions. That’s why many UK outdoor cannabis growers opt for a mix of fast-finishing autoflower seeds as well as some dependable photoperiod outdoor strains. The autoflower seeds should provide a mid summer harvest even if the late-season autumn/fall weather is bad and compromises your photoperiod harvest.

One other consideration is the last frost date. Many UK growers germinate their cannabis seeds indoors and give them a few weeks of indoor light (with e.g. an 18/6 or 24/0 light schedule). The seedlings should only be planted out after the last frost date for your location. With the benefit of indoor protection during their most vulnerable first few weeks, these plants should go onto deliver good growth and harvests.

Best outdoor autoflower cannabis seeds UK

The Dutch Passion autoflower seed collection are all great options for UK outdoor growers. They will often grow from seed to harvest in UK conditions in around 100 days, possibly a little faster in warm and sunny conditions. With the benefit of some planning and perhaps the use of greenhouses, you may be able to get two successive outdoor autoflower crops in one season if the weather is kind.

Many UK auto growers germinate their seeds in May and grow them indoors for a couple of weeks before planting out after the last frost. This allows mid summer harvests.

Even growers in the far north of the UK should be able to get an autoflower harvest if they grow in their warmest and sunniest 3-month period.

Giving the seeds a week or two of indoor growth after germination is always a good way of giving your plants a head start. All the Dutch Passion autoflower seeds would be good choices for an outdoor cannabis grower, but the following 5 strains are particularly recommended and produce great results for outdoor growers.

Auto Mazar

Auto Mazar is a tough and dependable autoflower strain using hardy genetics. She is part of the Afghani Kush cannabis seed collection. Auto Mazar typically grows into short, stocky cannabis plants with numerous side branches. Yields are heavy with a supremely enjoyable high and a rich hashy taste.

As with all outdoor strains, giving the plant the benefit of a couple of weeks of indoor growth after germination helps them become better prepared for eventual outdoor life. Gradually acclimatise your outdoor plants for increasing periods of time before eventually planting them out after the last frost.

Auto Mazar grows well outdoors across the UK. Choose a sunny grow location and where necessary offer some protection from the prevailing wind if planted in an exposed location.

Auto Ultimate

Any UK outdoor autoflower grower wanting the heaviest possible yields should look no further than Auto Ultimate. This is one of Dutch Passion’s undisputed heavyweight yielders. The genetics can take a week or two longer than other autoflower strains but repay the grower with unusually heavy harvests.

The large, dense blooms may need supporting to prevent them drooping down and touching the (potentially damp) ground towards the end of bloom. Harvests of 100g+ of dried buds from Auto Ultimate are not unheard of in the UK, especially when she has enjoyed an uninterrupted sunny/warm bloom period.

As with all outdoor strains, growth under the cover of a greenhouse or polytunnel will protect your plants from the worst of the weather and tend to increase harvest quantities.

Auto Think Different

Lovers of fine quality outdoor autoflowering sativa genetics look no further! Auto Think Different is a best selling, fully-proven autoflower strain that delivers very heavy yields. In the UK she grows from seed to harvest in around 100 days. As with all autoflowers, she benefits when grown in good quality, nutritious soil. If your local soil is poor quality, you may find superior quality/quantity harvests if you supplement with supermarket soil (or grow shop soil).

You can expect the typical Dutch Passion autoflower structure of a dominant heavy central bloom surrounded by a ring of slightly smaller blooms. Part of the Classics cannabis seed collection with very high THC levels – really easy to grow!

Auto Power Plant

Auto Power Plant is the autoflowering version of Dutch Passion’s original Power Plant. She is noted for particularly heavy harvests and uses cannabis cup winning South African sativa genetics. The numerous repeat growers value her for the prize-winning combination of very high THC levels, fast growth and unmistakably chunky blooms!

UK outdoor growers that enjoy a rich terpene profile from their harvests should enjoy the powerful buds with their intense skunky/hashy scented aroma. She is particularly easy to grow outdoors, just offer a sunny location with nutritious moist soil. Then sit back, relax and let the genetics do the work for you!

Auto Critical Orange Punch

Auto Critical Orange Punch has quickly become a best seller with outdoor growers. These are some of the most affordably priced autoflower seeds in the Dutch Passion collection. With very high THC levels and a fresh, zesty citrus taste this heavy yielding auto produces excellent outdoor harvests. The anti-anxiety, stress-busting high is intensely pleasurable as well as easy to grow.

Auto Critical Orange Punch seeds grow well in large containers. As with all Dutch Passion autoflower strains, air pots or fabric smart pots encourage high levels of root aeration and healthy growth above/below ground. She also responds well to LST and SCROG whether grown indoors or outdoors.

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Auto Critical Orange Punch seeds are highly recommended for those seeking highly potent harvests, she made the High Times Top-10 cannabis strains of 2018. A major achievement!

Best outdoor feminised cannabis seeds UK

Feminised outdoor cannabis seeds have the advantage of somewhat longer grow cycles and consequently heavier harvests (compared to autoflower seeds) for UK growers. The growth cycle is typically around 5 months from seed to harvest with plants typically ready for harvest around late September or early October.

However, not all outdoor feminised strains will finish in time in all areas of the UK. If you get unlucky with a cold and wet UK September/October then you can lose your photoperiod harvest to mold and bud rot.

Our recommended top-5 photoperiod outdoor feminised cannabis seeds are the toughest in the Dutch Passion collection. They will finish early, and are particularly resistant to outdoor conditions.

Frisian Dew

Frisian Dew has been a best seller with UK outdoor growers for many years. The robust, tough genetics were selectively bred over several outdoor seasons in The Netherlands. This allowed the genetics to acclimatise and adapt to the demanding and unpredictable northern European climate. Frisian Dew is part of the Dutch Outdoor cannabis seed collection, the home of Dutch Passion’s most popular and most successful outdoor seeds.

Frisian Dew is a durable strain that can withstand just about anything. She responds well to LST, supercropping and pruning. You can also try ‘Pinching’ or ‘Fimming’ several times during the growth phase to produce a bushier plant structure. This produces a shorter plant with many side blooms.

For the tastiest buds we recommend completely organic cultivation – with natural nutrition the taste is optimised. Pay extra attention to dead leaves during the middle and end of bloom. Due to the heavy dense buds, dead leaves can cause top rot and fungi more quickly. Grows well, even in northern England.

Durban Poison

Durban Poison is another outdoor strain well suited to UK conditions. This sativa dominant strain originated in South Africa and is often ready to harvest around early October in the UK.

Durban Poison doesn’t mind being bent, topped, super cropped or even scrogged outdoors. The genetics grow well in a range of soil types and are resistant to damp, cool UK summer conditions. Part of the Dutch Outdoor cannabis seed collection. Will grow in Northern England, but may well struggle to complete bloom in Scotland. Growers in the extreme north may prefer to consider growing autoflower seeds rather than relying completely on a mild, dry September/October.


Shaman is a large yielding, tough outdoor sativa strain. She often produces purple coloured blooms, especially in cooler outdoor flowering conditions. One of the more robust outdoor strains, she is also grown extensively in greenhouses and polytunnels.

Shaman is resistant to mold and bud rot, making her an ideal choice for the outdoor grower with borderline climate conditions. She requires little maintenance or special growing conditions. Just find her a sunny south-facing location and let the genetics do the work for you. Can reach 2-3m tall in good conditions.

Think Fast

Think Fast is a slightly unusual outdoor cannabis seed recommendation for UK outdoor growers. Think Fast is a feminised photoperiod strain with recessive autoflower genetics. This allows her to complete bloom somewhat quicker than most photoperiod outdoor strains. UK growers may be able to harvest her in mid/late September.

Think Fast is a good option for UK growers who typically find that their outdoor grow season is just a few weeks too short. With the extra bloom speed of Think Fast, it may be possible for you to complete the bloom cycle even in a short UK growing season.

Frisian Duck

Frisian Duck is a unique outdoor cannabis strain. She was developed with a stabilised leaf deformity, the leaves have a webbed appearance with the individual leaflets fused together. This makes it the ideal outdoor cannabis strain for any grower seeking a naturally stealthy strain!

Especially during vegetative growth, Frisian Duck looks unlike any cannabis plant you have seen before! UK urban growers find this natural stealth camouflage particularly valuable. THC levels may only be medium on this strain, but she still delivers a highly pleasurable smoke/vape. Also available in autoflowering cannabis seeds as Auto Duck.

Growing cannabis outdoors in the UK

Growing cannabis outdoors in the UK isn’t that difficult. Plenty of growers harvest their entire annual cannabis requirements from just a handful of outdoor plants grown from a few autoflower seeds or feminised outdoor seeds. One of the keys to outdoor success is to know your growing season well and plan your seed selection accordingly. The further north you are, the more likely that autoflower seeds will be your main outdoor seed choice.

Understanding the typical dates of your last frost allows you to know when to put your plants outdoors. Knowing when the end of season weather turns for the worse is another key piece of information to allow you to plan ahead. One of the most common errors, especially by new UK guerrilla growers, is to germinate their precious outdoor cannabis seeds too early in the season.

If you need some specific help and advice on the growing season at your particular location within the UK then the following guide may help. It offers detailed cultivation advice for outdoor cannabis growers in the UK South East, South West, North East and North West. It also gives detailed advice of germinating your cannabis seeds and the best ways to start your plants indoors and gradually acclimatise them to outdoors.

Top 10 Best Outdoor Autoflower Seeds UK 2022

If you’re an outdoor grower and are looking for the best autoflower cannabis seeds in UK, here is our top 10 seeds selection for 2022.

1. Climate In The United Kingdom

The climate in the UK is usually very humid and cold. You have to choose the strains carefully to avoid problems. By knowing the weather for the next couple of months you can plan your cultivation so you start when there’s good weather and a good amount of sunlight hours. By having (and understanding) a chart like this, you will ensure your plants grow in the best climate possible, this way you can predict when you’ll have more sunlight for your plants to develop better, an appropriate temperature so your plants develop properly and less humidity so you don’t suffer from bugs or plant disease, ultimately resulting in bigger yields, less problems, and an overall healthier plant.

Min. Temperature C°(F°)

It’s ideal to grow Indica dominant strains and preferably good genetics that are highly resilient for cold and humid climates.

Cold and humid climates tend to attract bugs and mold so it’s crucial you take good care of your cannabis plants in climates like this.

Here’s our top 10 strains that will give you an advantage over the harsh climate outdoor growers in the UK suffer from. Just remember that depending on where you are growing (balcony, backyard, etc..) you will want to look for a low odor autoflower seeds that grow well in the UK.

2. Gelato Auto

This strain has become a flagship for its delicious flavor, it is a stable plant that takes harsh climates very well, making it ideal for growers who want fast-flowering autos that produce top-quality buds.

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I recommend this to everyone! Super powerful with great flavors and yield. I think it was easy to grow. This is awesome strain!

It’s an extremely potent and resilient strain, develops really well in cold and humid climates, and with up to 26% THC. A great choice to grow outdoors in the UK, not only for the potency but for the high resiliency.

Grow Tips
  • Due to her bushy foliage, it is recommended light defoliation or LST training to avoid mold and pests.
  • Her extreme resin production makes her a good choice for making hash or other extractions.

3. Gorilla Cookies Auto

Thanks to its Indica lineage, this strain grows compact, robust, and is extremely resistant to diseases and cold weathers, these traits will give you an advantage when growing outdoors in cold and humid climates like in the UK.

I got 134g off this gal growing in 3 gal pot with 24 hours of light. i’m stoked with the result! Smells like diesel. Was a great grow overall.

By providing an appropriate pH level and good nutrients you’ll be amazed at the insane trichome production, even needing to provide support so the branches don’t snap due to the huge dense buds that can yield up to 550gr/m2 in 70 days!.

Grow Tips
  • Gorilla Cookies can take a big feeding especially during week 3 and onwards, make sure you feed her properly to increasean autoflowering plants yields and overall quality of your harvest.
  • This incredible producer may need support when flowering, make sure you have bamboo stakes available for the last weeks of flowering.
  • We recommend tying the branches or performing LST to avoid mold and provide more airflow for the buds to develop better.

4. Strawberry Pie Auto

This Indica dominant hybrid is easy to grow, suited for pros and beginners who will be rewarded with a prime-quality delicious resin, it’s also a great choice to grow outdoors in cold and humid climates like in the UK because of her Indica lineage.

First time on this strain first time lst . It was great although I made many mistakes with the PH , she treated very well.

Have in mind that even though she can resist cold climates and mold, you should perform LST to provide more airflow to the buds, this way you avoid mold and bugs that thrive in humid climates and can attack your plants.

Grow Tips
  • This strain prefers light feedings, make sure you water accordingly and let at least 80% of the soil dry before watering, to avoid bugs that reproduce in wet organic matter, like Fungus Gnats.
  • Make sure you flush properly during the final weeks of flowering, this way you make her colors stand out and guarantee a smooth smoke, and a strong aroma and flavor.
  • By low stress training your plant (with LST or other methods), you can yield more than 550gr/m2 in around 8-9 weeks.

5. Zkittlez Auto

A delicious candy-sweet Cali strain that conquered every consumer’s stash due to its delicious taste; Thanks to its Indica heritage, this hybrid grows compact with multiple bud sites and it’s super easy to grow outdoors, requiring low maintenance.

Just an easy to grow, solid packed buds. A heavy feeder and can be a bit prone to light burn at the end but otherwise perfection!

Because this plant grows a lot of side branches close together with dense buds, we recommend tying them down to avoid problems with mold, due to the humid climate in the UK.

Grow Tips
  • Being one of our hefty producers, we recommend providing support so the branches can withstand the weight of the buds.
  • This strain tends to need a lot of nutrients, so we recommend you feed her quite heavily and with good quality nutrients.
  • To avoid bugs, it is highly recommended you LST, providing more airflow in between the buds and branches.

6. Purple Lemonade Auto

Purple Lemonade is a vigorous and sturdy strain and is a great choice both for indoor and outdoor growers who will be rewarded with beautiful purple buds that reek of a mouth-watering citrusy aroma.

Thank you Fastbuds! I can’t believe you can grow stronger stuff from autos than you can find at a dispensary! So high right now! 10/10!

Even though she develops exceptionally well without nutrients, you can have an amazing harvest by providing good quality nutrients and proper usage.

Grow Tips
    during the last two weeks is recommended to make her flavor and smell really stand out.
  • Because this strain can grow up to 110cm, we recommend performing LST of tying down the branches to keep your plants discreet.

7. Wedding Glue Auto

This hybrid is super easy to grow, well suited for beginners and for lovers of Indica hybrids with sweet terpene profiles, It’s very resistant to pests and mold while requiring low maintenance, making it a great choice for outdoor growers, who look for an extremely resinous strain.

Easy grow and she wants to live calmag poisoned her and two others I was on to it quick she is super sticky starting week 9 time of photo

This Indica-dominant strain grows dense and bushy, with a lot of side branches, and even though it’s a highly resilient strain, due to the climate in the UK we recommend LST or other forms of plant training to avoid pests and mold.

Grow Tips
  • Remember to always keep an appropriate pH level for the medium you’re growing in, this way you ensure your plant is absorbing nutrients properly and avoid any problems.
  • We recommend growing Wedding Glue in 15L pots to make sure the plant develops to its fullest.
  • By low stress training your plant (with LST or other methods) you prevent mold and can ultimately yield more than 550gr/m2 in around 9 weeks.

8. Afghan Kush Auto

Afghan kush Auto is ideal for new growers and pros, she can easily forgive novice’s mistakes and can put up with training methods while easily rewarding you with up to 500gr/m2 in 56 to 63 days.

Topped my plant W2 and it responded very well to stress. Even canopy with chunky, solid buds. shipping took a couple of days longer than expected.

Even though this is a robust and resilient plant (ideal for growing outdoors), she grows quite bushy due to her Indica heritage so we highly recommend LST techniques. Because the UK has a humid and cold climate, the extremely dense buds can get mold if you don’t provide good airflow.

Grow Tips
  • We recommend LST techniques not only to improve yields but also avoid any kind of problem with bugs and mold.
  • Beware, this plant reeks of earthy and spicy aromas, and the smell can be hard to mask when growing outdoors.

9. Wedding Cheesecake Auto

This is one of the most powerful strains from Fast Buds. A super easy to grow plant with a powerful terpene profile, perfectly fit for new growers.

Beautiful plants, and consistent among the three. I topped all of them and got around 115g off each in 2 gallon pots. Very pleased

Thanks to her Hybrid lineage she grows exceptionally well in cold climates (ideal for the UK), as she is used to the cold California night times and doesn’t require a lot of maintenance while yielding up to 600gr/m2 in around 63-70 days.

Grow Tips
  • Be careful when growing outdoors, the terpene profile on this strain can be felt from far away.
  • Make sure to give her enough nutrients, as this strain tends to take a lot of nutrients to develop to its maximum.
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10. Strawberry Banana Auto

This is one of our most potent strains, an unbelievably easy to grow autoflowering plant, great for beginners. This Indica hybrid is a very popular choice for growing outdoors in a cold harsh weather like in the UK due to her lineage.

Delivery was a bit slow. other than that I’m satisfied with the buying process. EVen got some freebies with my order which is always nice.

You will be amazed by her ability to fight off bugs, and withstand cold weathers, while yielding 600gr/m2 of beautiful resinous and dense buds in around 10-11 weeks, a perfect variety for the lovers of trichome-rich strains.

Grow Tips
  • We recommend flushing 2 weeks prior to harvest to remove excess nutrients and reveal her true flavor and aroma.
  • Even though she’s highly resilient to cold and humidity, we recommend LST to provide air flow to avoid bugs when growing outdoors.

11. Purple Punch Auto

Purple Punch Auto is very easy to grow and one of our most productive strains, a great strain to grow in the UK because thanks to her Indica heritage she can yield up to 600gr/m2 even in cold climates.

I got way over a pound in my 4×4 tent, the color and the smell are beautiful, tested one nugget before the cure and it was fire.

Even though she can withstand harsh climates, we recommend LST techniques to provide more airflow to the buds, because they are extremely dense, water can get stuck in them and that is where mold thrives.

Grow Tips
  • Be extremely careful when growing outdoors as she reeks of a pungent smell and can bother your neighbors.
  • Despite growing tall this plant develops quite compact, perfect for a discreet outdoor grow.

12. In Conclusion

If you’re thinking of starting your next growing cycle outdoors you can’t go wrong with these strains, and if you’re a medical patient, have a look at our autoflower CBD seeds for the UK. Have in mind that even if they’re resistant to disease and cold climates, they still need a minimum amount of maintenance and care so you avoid any problems. Remember that even though these strains grow well outdoors in colder and more humid climates such as in the UK, you can always build a basic greenhouse structure to protect your crop from stronger wind, rain or snow. The strains mentioned in the blog are quite resistant to colder climates but they’re living beings so if you want to get the most out of every single plant, it’s a good idea to keep them well-fed, protected from rain or snow, and keep an eye on them every day to make sure there are no signs of pests or mold attacking your garden.

We hope our 2022 autoflowering cannabis seeds for the UK selection will help you to prepare for your outdoor growing season in the UK and if you have grown autoflowering strains in the harsh climate before share your experience in the comment section.

The Best Outdoor Cannabis Seeds UK

The UK is wet. And cold. At least 80% of the time. So, not really the best place to cultivate your cannabis outdoors. Googling ‘outdoor cannabis seeds UK’ can be quite a frustrating undertaking. That’s probably how you ended up here.

Of course, the weather outside doesn’t matter when you’re harvesting indoors. But some of us just want to plant a seed and let it grow without worrying about ventilation, and lighting conditions, and everything else that comes with an indoor grow.

Every cannabis seeds present their pros and cons, but in general, if you’re looking for the best outdoor cannabis seeds in the UK, you should go for an autoflower.

Autoflowers need less attention and take less time to flower. If you’re looking for the best outdoor cannabis seeds in the UK, get yourself some autoflowers.

So, with that being said, here are 3 of the best outdoor autoflower cannabis seeds you can buy today at Seedsman.

Pink Kush CBD 30:1

Pink Kush CBD Auto results from crossing Pink Kush CBD Auto with Pink Afghan CBD Auto strains. It is 90% indica, has a fast life-cycle and a CBD: THC ratio of at least 30:1.

As an auto-flowering strain, it will be suitable for just about all environments. Taking a scant 9 weeks from germination through to harvest yields is good, although we do not yet have any exact figures. Outdoor growers in warm climates will be able to achieve 2 or even 3 harvests per year. It displays an attractive pink colour in the buds.

Bubble Gum Auto

Auto Bubble Gum is the product of crossing the sweetest and most pungent auto-flowering indica plants that 00 Seeds possesses. Its 12% THC and high CBD production make this a potent medicinal strain.

Auto Bubble Gum grows to a height of between 80 – 130 cm. with outdoor plants nearer the top of the range.

Resin production is high, and the dried buds have a delicious flavour of strawberries and red fruits. Its effect is powerful, and it is a medicinal strain with general applications. Bubble Gum is one the best outdoor cannabis seeds UK, Europe or anywhere with a shy sun!

White Widow Auto

Auto White Widow takes the legendary White Widow strain a stage further so that growers no longer need to worry about reducing photoperiods to stimulate the flowering cycle’s onset. The White Widow marijuana strain has long been one of the most popular of the Seedsman strains, and with good reason. It is famous for its fast and hard-hitting high, which evolves into a pleasant, relaxing effect.

The introduction of ruderalis genetics allows harvesting trichome-covered frosty buds in only 11 weeks from germination from vigorous, quite short-statured plants that enable discreet outdoor crops to be grown almost anywhere.

Cultivation information, and media is given for those of our clients who live in countries where cannabis cultivation is decriminalised or legal, or to those that operate within a licensed model. We encourage all readers to be aware of their local laws and to ensure they do not break them.


Not only do we have one of the most comprehensive libraries of cannabis seeds in the world, we now offer a diverse range of cannabis related goods for you to enjoy including storage products, clothing and books.

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