How To Germinate Weed Seeds In Cold Weather

germinate your cannabis seeds you will only need water, heat and air to break open to break the shell that covers them and give life to the main or primary root When it comes to seeds, most people want them to start growing as soon as possible. Here are some tips on how to speed up seed germination! How cold is too cold for cannabis? Whether that’s indoor or outdoors, growing cannabis in cold climates present extra challenges you'll learn to overcome in this guide.

How to Germinate Cannabis Seeds in Winter

First of all, we tell you that to germinate your cannabis seeds, you will only need water, heat, and air to break the shell that covers them and give life to the main or primary root. They do not need hormones, fertilizers, or additional additives. The sprouting of the seeds takes place without light with certain temperature ranges. Seeds that are in a healthy state germinate in 2 to 7 days.

When germination occurs, the outer protective shell of the seed opens and a small white shoot emerges called the taproot. Then, the cotyledon leaves emerge from the ground with their respective stem from inside the seed shell, seeking the light.

If you want to keep the seeds for later cultivation, it is best to keep them in an airtight pot with a hemertic bag and in complete darkness in the area where you keep the vegetables in your fridge. This allows good conservation of the seeds and prevents major germination problems in the future. On the contrary, the seeds will germinate easily and quickly if you preserve them in this way.

Step by step guide to germinating seeds in winter

1- First 24 hours: You can let the seeds rest in a glass of water. Make sure the ambient temperature of the place does not drop below 15ºC or 59ºF.

2- Second, take the seeds and put them on a damp napkin in an airtight plastic container that you can put on top of a heat source such as a television or internet modem. Make sure that the napkin has a certain thickness so that the seed does not burn with the heat of the modem and try to maintain the room temperature so that the container and the seed do not suffer from sudden changes in temperature.

3- After 24 to 72 hours, the seeds will germinate. Try to always keep the container and the napkins moist. If you wish, as soon as you see the root come out from inside the seed, you can transfer it to the ground. In other cases, you can wait for the taproot to spread a bit more before putting it in the ground which some growers prefer.

What does the seed need to germinate?

You may already understand what you need to be able to germinate your cannabis seeds in a great way. However, we are going to leave you with a list of the basic and fundamental elements to carry out the process.

A great level of water:

When you soak cannabis seeds in water, it allows the moisture to penetrate the protective shell of the seed in minutes. In a few days, this allows the hormones to be activated and send enough signals to produce the main root. The white radicle means that it is ready to go into the ground and start its cycle as a plant.

It is also good to say that some seeds need a lot of humidity to germinate. You must be careful because too much water deprives the seed of oxygen, reducing its quality, or damaging it completely. On the other hand, when the seeds are fragile and they are germinated and they suffer water stress (excess water), the growth of the seedlings is weaker.

Good temperature:

Generally speaking, pot seeds germinate with temperatures of 70 ° F to 90 ° F (21 ° C to 32 ° C) and grow best at 78 ° F (26 ° C). Temperatures below 21 ° C (70 ° F) and above 32 ° C (90 ° F) can damage germination and low temperatures can slow germination. When you germinate cannabis seeds in high temperatures, they can be chemically affected and the result will be poor germination.

Air and oxygen:

When starting the germination process, it is necessary to take into account that the seeds require fresh air at certain times to have a successful germination. For this reason, we recommend that every 4 or 5 hours, you open the airtight plastic pot that you are using in order to let the air circulate and if necessary, we suggest that you change the wet napkins because in some cases they tend to produce fungus that can affect the cannabis seeds you want to germinate.

The best strain for growing in winter

Now you know the main tips to germinate your weed seeds in winter, so you are ready to start growing your own cannabis plants. We will leave you with the best strains that you can have in your garden during the winter temperatures. We made this list thinking about the level of difficulty of the plants, how heavy their harvests are, their aromas and flavors, as well as the power of their buds.

Gorilla G4

We put Gorilla G4 on this list because it meets the requirements to be grown indoors during winter. In the first place, it is a mostly sativa variety that produces heavy indoor yields of 500gr – 600gr/m2 and is ready to be harvested in a period of 9-10 weeks of flowering.

The spicy pine and sweet flavors such as cherry are accompanied by its power that reaches 27% THC. These combine in a great way with the effects of this variety that are euphoric, super energetic, and happy with a lot of laughter and also relaxed in terms body effects.

Cafe Racer

This wonderful variety that we baptize as Cafe Racer is a favorite of growers and followers of Blimburn Seeds as it stands out for being a very great producer of buds with indoor yields from 350gr – 450gr/m2 in a relatively short time of only 70 – 75 days of flowering indoors.

Also, it stands out for the deliciousness of the flowers that produce citrus flavors of grapes and earth, a combination that permeates the palate and that is also released with the smoke in each puff. The potency of this variety can reach 27% THC, causing effects of creative moments with laughter and joy. If you go beyond the limits, you will feel a bearable body relaxation.

Black Domina Fast Version

Black Domina Fast Version should undoubtedly be on this list because it has mostly indica genetics with ultra fast flowering, taking only 6 – 8 weeks which is very beneficial for indoor winterizers. The harvests are abundant with 350gr – 450gr/m2 of buds indoors, a non-depreciable quantity, even more so if you are a fan of indica genetics.

Its effect is absolutely relaxing, perfect for smoking after a long day of work. This strain has a potency that ranges from 11% – 18% THC. The flavors are delicious as they have fruity notes with spicy touches and earthy fragrances.

Tips for growing indoors in winter

Here, the most advisable thing is to grow completely indoors. If you try to do a mixed culture, that is, that the plant grows with natural light and adding indoor lighting, be warned that your cultivation could be a failure because the plant will produce much fewer flowers and also its structural development will be less. Due to that, it is best to have an indoor space where the plants can develop with growth power and then move on to an abundant flowering.

Taking into account the above, we are going to share some tips for successful cultivation in winter. First, the temperature is essential when growing cannabis, especially in winter, so we recommend daytime temperatures of 24-30 °C (75-86 °F). However, at night, the optimum temperatures are between 18-22 °C (64-72 °F).

As a good grower, try to avoid temperatures below the range indicated above and also ensure that the changes in indoor temperatures between day and night are not so abrupt in order to avoid any type of stress to the plants.

It is good to point out that temperature changes cause the plants to make longer and more spaced internodes during the first weeks of flowering.

On the contrary, if the temperature difference between day and night is the minimal during the first flowering phase, this will reduce the internodal spaces in the weed plant. The maximum ideal temperature difference is 2-4 °C (3.6-7.2 °F) during the first 2-3 weeks of flowering. For the rest of the flowering period, temperature changes should not exceed 10 °C (18 °F) and your plant will flourish happily.

A good way to keep the grow room at the optimum temperature is to use HPS or high pressure sodium lighting. These bulbs emit heat, causing the low temperatures inside to decrease. This trick is widely used by old-fashioned gardeners who have experience growing indoors during winter. Unlike in summer, when grown in winter, producers turn on the lights at night and use the day as the night period. This allows the grower to take advantage of the warmer temperatures during the day.

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To maintain proper temperatures, we recommend that you use a heater during the day if the temperature drops beyond the ideal range of 18-22 °C (64-72 °F). The above, you can keep controlled with a digital thermometer which will indicate the fluctuations in the crop. If you use LED lighting, the best thing you can do is keep a heater on for a longer time in order to stabilize temperatures as these emit much less heat.

In winter, there is a tendency for low temperatures to increase humidity. For the same reason, mold and other fungi can appear and damage your harvest completely. Make sure to follow our advice and use heaters and the humidity meter. If the humidity problem is very intense, a dehumidifier is needed to lower humidity levels.

There is the possibility that your growing area will be drier in winter as it is for many other growers. If the humidity is too low in winter and that is felt in the grow room, your plants can be affected in their growth because weed plants need a relative humidity of 55% to 60% in growth. In flowering, the humidity should be between 40% to 50% as the ideal maximum.

In short, you already know how to germinate the seeds in winter and we have also shared some tips on how to grow at this time of year so that you will have excellent harvests and a great experience growing. Do not forget that if you have any questions or concerns, you can leave it in the comments and our expert team will give you the advice you need. Buy the best cannabis seeds that are 100% guaranteed here at Blimburn Seeds. See you on the next blog!

​How to Speed Up Seed Germination During Winter and Spring

If you live in a colder part of the nation and are an avid gardener, you’re probably champing at the bit to get some seeds in the ground. If you have a greenhouse, that might only be a few months away. If you’re a gardener in a colder state like Colorado, you’re going to have longer to wait. And no matter how long your growing season is, you’re likely to want to get to harvest faster once you plant your seeds. Which leads to a topic that often comes up here at our nursery supply company: how to speed up seed germination.

It’s a question that home gardeners and nursery suppliers have been asking for a very long time. While genetic engineering can help a plant grow faster, there are some aspects of speeding up seed germination that you can control. Let’s take a look at ways that you can get those seed popping faster.

Soak Them In Water

There’s not much easier advice than this! All you have to do is pre-soak the seeds in hot tap water for 24 hours. The water penetrates the seed coat and allows the insides of the plant to break from the seed more easily. Usually this occurs naturally in the soil, but it can take a much longer time.

The only thing you have to be careful of is letting the seeds soak for too long. Any longer than 24 hours and they could start to rot even after you put them in soil.


Scarification is another physical means of speeding up seed germination. The purpose of a seed is to protect what’s inside and then provide initial nutrition to the plant. Because of this, the seed coat is quite hard and fairly good at protecting its interior. Scarring the seeds will remove a bit of this seed coat in order to let water in, which starts the germination process.

There are a couple of ways that you can scar a seed before putting in a ground. If you only have a few that you’re planting, you can take a knife and knick each seed, or scrape each with a bit of sandpaper. But that can get quite tedious if you’re planting hundreds of seeds, so you can speed up the process by shaking them in a jar with a piece of sandpaper.

Seed Stratification

Seed stratification is the process of tricking a seed into germination earlier than it would when it’s out in the wild. Stratification is often used for wildflowers that have a very hard outer coat on their seeds. This coat prevents the seeds from opening too early in the wild if there’s a particularly warm February day.

Seed stratification is necessary for plants that are expecting to overwinter in the ground. But if you get your seeds in the mail in March, you don’t want to have to wait another entire year before you can enjoy them. Seed stratification involves putting seeds in a moist, soil-filled bag for a time, usually 10 days to three months. This “tells” the seeds that they are cold, and that they can go ahead and wake up and start germinating. This process is especially good for our nursery customers who need full plants to sell to customers by April.

If you get your seeds in the fall and can actually make use of the natural cold outside, you can overwinter them in your garden. The problem with this is recovering the seeds later, because locating them can be difficult. The best way to find this is the put them in pots and bury the pots themselves, then dig them up and transfer to them wherever you want them when they start to sprout.

Keep Them Warm

No matter the kind of plants you are using, there’s one thing that most of just love: warmth. Keeping seeds warm tells them that the summer has arrived. Of course, that’s the purpose of most greenhouses. If you don’t have a greenhouse, keep the seeds in a south-facing window. You can even use something like a seedling heating mat that warms the seeds in their pots.

Don’t Forget to Harden Them Off

Plants that are started indoor have it pretty easy. After all, you soaked the seeds and scarred them so that the plant itself could emerge. Then you told them that winter was over and warmed them up considerably!

Since they didn’t have to work hard in order to get out of the seeds, seedlings haven’t been hardened by the world yet. They aren’t used to being cold or being whipped around by the wind, so seedlings that have been raised indoors are more likely to die than those that have been grown directly in the garden, even if they look identical.

Hardening plants is easy. Just take them outside in Spring for a couple of hours each day, then a bit longer each day after that. Eventually the wind will “harden” them to the wind and cold, at which point you’ll be able to plant them in the ground. Just don’t forget about them and leave them out overnight during their first day, or all of the work you did up above will be for nothing!

Then Come Back For Your Gardening Tool!

Of course, seed germination is on the first step to a healthy plant. Once your plants are growing in the garden, you’ll need to take care of them with the best garden hand tool around. Find them right here, and happy planting!

Top 10 Tips for Growing Cannabis in Cold Climates

Can weed grow in cold climates? Some growers worry at the thought of trying to grow cannabis in cold climates, whether that’s indoor or outdoors. Yes, cold climates present extra challenges for cannabis growers. But they also present some advantages and opportunities. You may find it easier to grow buds with hints of autumnal colours, or easier to prevent grow room temperatures from getting too hot, for example. With good planning and the right cannabis seeds, growing cannabis in cold climates isn’t merely possible, it’s quite straightforward and may even offer some surprising benefits.

Indoor weed growing in cold climates basics

Growing cannabis indoors can seem like the best approach if your climate is simply too cold and the outdoor growing season is too short. Indoor cannabis cultivation is a chance to avoid the worst of the early season and late season weather.

Although many consider it relatively easy to grow good quality cannabis indoors, there are some considerations when the weather is cold. If you are growing on a cold concrete floor, the root space of your cannabis plants will quickly find the heat drained from them. This can dramatically slow down growth, affect quality and cause issues with nutrient uptake if temperatures have dipped too low for too long. If your grow room is too cold results will be significantly below expectation and harvest quality may well be disappointing.

When growing indoors in a cold climate, consider which room to grow in. Perhaps, if you have the choice, you will want to avoid a room with too many external walls. This can cause the room temperature to drop further than you might like, especially during the ‘lights off’ period. You may also want to avoid trying to grow in the loft – this can also present problems with temperature extremes in mid winter when your lights are turned off.

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That’s why many indoor growers grow autoflower seeds during the winter months. With 20 hours of daily light (or even 24 hours!) your grow light will be able to help keep the grow room warm. Though it’s worth adding that some of the latest and most efficient LED grow lights don’t produce much surplus heat at all. Older HPS lights, however, are less efficient and do produce plenty of heat which may come in useful during winter grows.

A Dutch loft grower got a nasty surprise when the snow melted on his roof and the neighbours called the police. Indoor growing in cold climates can present certain challenges!

Loft growing during winter can result in tell-tale signs of snow melt on your roof, causing paranoia and worry. You need to be aware of the risks. But the indoor grower, with some creative thinking, should be able to overcome the challenges of growing cannabis in cold climates.

Outdoor weed growing in cold climates basics

Can you grow weed outside in the winter? Maybe not in a northern European winter. But you can grow cannabis well in cold climates. Much depends on your climate and temperatures. If trying to grow cannabis indoors in a cold climate isn’t for you, then you will be relieved to know that plenty of outdoor growers have great success in cold outdoor weather. Lots of growers manage to grow cannabis in the cold climates of Scandinavia and Northern UK. Outdoor growers in Denmark have even managed to get two successive outdoor autoflower crops per year. The first auto crop is an early season harvest, the other is a late season outdoor grow. The following article explains more:

Getting 2 outdoor auto crops in one season in Scandinavia. Cold climate outdoor grow guide

Growing weed in winter may only be possible in tropical climates. But growing cannabis outdoors in cooler temperate climates requires the right outdoor cannabis seeds combined with a good understanding of the length of the growing season. You will need to maximise your plants exposure to the sun, choose a sunny and sheltered spot perhaps with some protection from the prevailing wind.

What temperature is too cold for plants outside? Plants will tolerate the occasional nighttime low temperatures of around 10ºC but not for extended periods.

You will also need to ensure that your plants are protected from pests such as slugs and snails as well as protecting them from other animals such as rabbit, deer etc. If you’re growing cannabis on your own land you will also want to choose a private location that isn’t easily overlooked by neighbours.

Ultimate checklist for growing cannabis in cold weather

If you live in a cold climate you need to evaluate the pros and cons of indoor cannabis growing vs outdoor cultivation and then decide which best suits you. To help, we have listed our top 10 tips for growing cannabis in cold climates.

1) Pick the most cold-resistant cannabis strains

There’s no point trying to grow tropical cannabis strains outdoors in unreliable, marginal conditions. Instead, you need to consider specialist outdoor cannabis strains that have been selectively bred over many generations. Selective outdoor breeding uses genetics from plants that have adapted well to the difficulties of outdoor life.

The Dutch Passion outdoor seed collection has been fine tuned for over 3 decades with some of the very best outdoor cannabis seeds, created specifically for outdoor growers at Northern European latitudes.

You may prefer to select outdoor indica strains rather than trying to grow a late blooming Haze/Sativa strain in a cold climate. Indicas tend to have shorter bloom cycles which better suit the short summers.

How to grow weed outdoors in winter?/Growing cannabis outdoors in winter? Unless you live in a climate with warm winters (such as a country close to the equator) it is simply impossible to grow cannabis outdoors with good results in winter months.

If the arrival of the cold autumnal weather arrives too close to the harvest date for your feminised outdoor strains, you may prefer to grow autoflower seeds outdoors. Autoflower seeds are often ready to harvest outdoors around 100 days after germination. The means that you can grow them outdoors even in the shortest of summers.

Growing cannabis outdoors

2) Maintain a consistent temperature

The changes from daytime maximum to night-time minimum temperatures can be extreme in some areas. The successful outdoor cannabis grower knows the importance of avoiding extremes and trying to maintain a consistent temperature. Once outdoor temperatures dip much below 15ºC growth rates tend to slow dramatically.

Outdoor temperatures of around 23ºC (around 73ºF) are ideal for outdoor cannabis growing. Temperatures of above 30ºC are best avoided, though in a warming climate that is difficult. Even Scandinavia has recorded summer temperatures above 30ºC in recent years.

Many outdoor growers make a google check to find out the average date of the last Spring frost in their area. Putting/planting your cannabis plants outside after the last frost is always best practice. The experienced cold climate weed grower may well choose to germinate his outdoor plants in the warmth and safety of the indoors until the last frost has passed. Then the plants can be gradually acclimatised to the great outdoors for a few hours per day before being permanently planted into the best outdoor grow location you can find.

Cotton pads, the best way to germinate your cannabis seeds

Growing marijuana outdoors in winter isn’t easy. Choosing fast blooming varieties is the best way to avoid the worry of a fast approaching cold season. One other way to maintain a consistent temperature is to consider a greenhouse or polytunnel.

Does frost kill buds? Yes, a severe frost will not just ruin the buds it may kill the plant completely. If you are trying to bloom outdoor plants in frosty weather it may be time to consider growing autoflower seeds or early flowering photoperiod feminised outdoor seeds.

How to grow weed outside in the winter? Growing cannabis in a greenhouse during winter is possible if you have supplemental heating and lighting. This is the technique used by Californian greenhouse growers. Without supplemental lighting and heat, the winter harvests would be substantially lower than the summer greenhouse crops.

Even without supplemental heating and lighting, a greenhouse (or polytunnel) protects your delicate seedlings from the worst of the early season weather. It also protects your precious buds from the worst of the late season cold weather. With consistent temperatures you help the plants to deliver optimised growth, health, yield and potency.

Growing cannabis in a greenhouse

3) Control humidity levels at all time

Temperature and humidity are always important when growing cannabis. But for those growing in cold conditions, it is especially important. Controlling outdoor humidity isn’t possible, but the expert outdoor grower is aware of the seasonal fluctuations in his local conditions and will factor this knowledge into the planning.

During late bloom, the danger of mold and bud rot is always a threat. In cold weather, morning dew can form on your outdoor blooms. This can lead to botrytis (bud rot/mold). Bud rot is one reason why many outdoor growers look to find an outdoor grow location with plenty of morning sun and preferable all day sun! Morning sunshine encourages the morning dew to evaporate minimising the chances of rot.

4) Beware of overfeeding your plant with nutrients

Correct nutrient management is one of the cornerstones of cannabis cultivation. Maintaining your plants in the nutrient sweet spot, without over-feeding or under-feeding is a skill that improves with experience.

Outdoor growers need to be particularly aware of some issues that can be seen in cold climates. That’s because cool air tends to be dryer and cannabis roots may compensate with greater water/nutrient uptake. If the soil is particularly rich in nutrients that can cause slight nutrient burn, often visible on the leaf tips.

If temperatures get too cold, around and below 10ºC, the plant will struggle to absorb nutrients and may be unable to absorb sufficient Phosphorus. This is known as nutrient lock-out, the necessary nutrients may be present but due to cold (or incorrect pH) the nutrients can’t be effectively absorbed.

Indoor growers that experience cold temperatures should consider additional heating or perhaps some electrically heated grow mats which prevent the root zone becoming too cold.

5) Keep an eye on your root-system development

Smart outdoor growers will often use specially bred outdoor seeds (or perhaps autoflower seeds) for the best results. In both cases, the health of the cannabis root system is paramount. When outdoor plants are grown in containers the root zone can get very cold especially in early/late season weather extremes.

Plants that are rooted directly into the ground may not have the benefit of transportability. But the roots will stay much warmer in the ground than they would in a container above ground during a cold night. If you have chosen your grow location well with all-day sunshine, the sun will warm up the soil which retains heat during the night for those plants rooted directly in the ground.

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Cold roots simply can’t grow rapidly. If the root zone is left too cold for too long plant health will soon start to suffer and growth rates will slow. Indoor growers with plant containers positioned on a cold concrete floor will see the same issue.

All you need to know about cannabis roots

6) Choose the right lighting if you’re growing indoors

LED lighting may be all the rage, with optimised spectrum and longer life. But ageing HPS light technology does have one advantage – it produces a lot of heat. Often excess heat is regarded as a grow room problem. But if you have a cold grow room with cool external walls, an HPS light can perform the double function of lighting your plants and warming the room. Though be sure to consider grow room temperatures when the HPS lights are switched off.

7) Time your grow with accuracy

Just as loft growers may not want to consider a grow in the middle of summer, cold-weather growers also need to consider the timing of the grow and the temperatures that will be faced. For some growers, avoiding the summer heat problems can be a blessing. If your main issues are grow room temperatures getting too hot, then you may actually prefer to grow in the winter months. Conversely, if you know that it’s difficult maintaining grow room temperatures in the depths of winter, you may prefer to avoid growing cannabis in winter all together.

If you need to avoid the onset of winter, then growing autoflower seeds outdoors over the summer could be easier than risking an outdoor photoperiod grow which may not finish in time.

Use of greenhouses and poly tunnels can be essential for those growers that want to protect their plants form the worst of the early and late season weather. But if you can time your grow accurately and use early flowering outdoor seeds you can expect good results. The following article about a Danish grower who produces large plants in Scandinavia may be encouraging reading for those trying to grow weed outdoors in cold climates.

Growing large cannabis plants outdoors in Denmark

Are there cold weather autoflower seeds which will grow well in winter? Unfortunately not. Cold climate autoflowering seeds just don’t exist. Select the warmest and sunniest 3 month period of your outdoor growing season to grow your autos. Some outdoor weed growers have such short growing seasons they simply have no choice but to use autoflower seeds.

Top 5 best yielding autoflower strains

8) Learn to recognise your plant’s warning signs

Know the signs of a plant which is struggling to cope with poor outdoor conditions. The signs plants are too cold may include the following:

  • Leaf edges start to curl
  • Leaves turn yellow much faster and earlier than usual
  • Growth can slow or even stop completely
  • Leaves may brown and drop off, and the petioles (stalks which connect leaves to the stem) may turn brown

Knowing that your plant is in trouble is a warning sign to try to correct the situation, or avoid it in future.

9) Consider swapping your light and dark cycles

If you grow cannabis indoors in cold weather you may wish to consider having the ‘lights on’ period after sunset when ambient temperatures are coldest. This way, the lights-off period happens during your daytime when ambient temperatures are warmest. This helps maintain a more consistent temperature and avoids excessive temperature swings. In turn, this improves plant health and contributes to improvements in harvest quality.

10) Try force-flowering

If you’re growing photoperiod feminised cannabis seeds outdoors in a greenhouse you may want to consider greenhouse blackout blinds. These are used by many licensed greenhouse producers in legal grow environments such as the USA.

A blackout blind is used to force plants to flower in 12/12 light conditions even if the sun is shining outside. Using a blackout blind allows you to start 12/12 bloom conditions in early summer if you wish. It’s a great way to avoid the coldest temperatures later in the season.

Force-Flowering also has the benefit that you can select other, perhaps heavier yielding, cannabis strains which might not otherwise finish before the winter weather arrives.

Top 5 fastest growing cannabis strains

The following Dutch Passion strains have all been grown successfully by growers with challenging growing climates and cold weather. For those with the very shortest growing season, autoflower seeds are highly recommended.

Top 5 strains to grow in cold weather

Frisian Dew feminised (Dutch Outdoor)

Frisian Dew is one of Dutch Passion’s best selling outdoor cannabis seeds with literally thousands of repeat growers. She grows well as far north as Denmark/UK and tends to be ready for harvest around the start of October. Frisian Dew seeds are part of the Dutch Outdoor Seed Collection.

Auto Mazar (Afghani Kush)

Auto Mazar is a tough and hardy strain, part of the Dutch Passion Afghani Kush cannabis seed collection. Outdoors she takes around 100 days from seed to harvest. She often reaches around 75-100cm in height. If your growing season is very short, even for autoflowers, you can always consider germinating the Auto Mazar seeds indoors and keeping them there for a couple of weeks before placing them outdoors permanently. This way, the plants are protected from the weather/pests while they are at their most vulnerable.

Auto Mazar growing outdoors in a cold Welsh summer

Hollands Hope feminised (Dutch Outdoor)

Hollands Hope is another member of Dutch Passion’s cannabis cup winning collection of Dutch Outdoor cannabis seeds. It’s a large yielding indica with high THC levels and good mold resistance. This strain was bred outdoors in Holland and is a reliable outdoor photoperiod feminised seed which is fully proven over many years.

Holland’s Hope outdoor grow review in Canada, mold free harvest!

Auto Duck (Dutch Outdoor)

Auto Duck is an autoflower seed which performs very well in cold climates with short summers. She takes around 100 days from seed to harvest and is another solid autoflower choice for outdoor growers. One added advantage of Auto Duck is that she grows with a stabilised leaf deformity. This gives her natural stealth, you could walk past an Auto Duck and not realise that it’s cannabis! It’s a useful additional feature to a popular outdoor auto strain. The photoperiod feminised seed version called Frisian Duck is also highly recommended for outdoor growers in cold climates.

Auto Duck grown in a polytunnel

Durban Poison feminised (Dutch Outdoor)

Durban Poison is a photoperiod feminised seed variety with a great reputation amongst outdoor growers. Outdoors, Durban Poison seeds can grow to around 2m tall in typical conditions and is ready to harvest in early autumn. Just like the other outdoor cannabis seeds mentioned, Durban Poison is hardy and robust with solid yields and particularly strong buds.

Durban Poison is another member of the proven Dutch Passion Dutch outdoor seed collection with high THC levels and robust outdoor performance.

Durban Poison and Frisian Dew grown outdoors in Wales in a cold, damp summer

Specialist High Altitude cannabis seeds for cold climates

One other successful strategy used by those that grow cannabis outdoors in cold climates is to grow specially developed High Altitude cannabis strains. Such varieties have been selectively bred at high altitude. One by-product of these tough high altitude strains is that they are also particularly well adapted to cold weather. Many of those that grow these high altitude strains remark at how well the plants cope with particularly cold night temperatures.

Dutch Passion undertook some selective high altitude cannabis breeding in the Swiss Alps during the 1990’s. The best performing genetics were selected over several generations until two stand-out strains emerged, Snow Bud and Pamir Gold. Today, both these strains are relied on by many that grow their cannabis in high altitude locations such as the Alps, Pyrenees, Sierra Nevada and Caucasus. If your usual strains simply struggle to cope with the temperatures at your grow location then maybe growing some Snow Bud seeds or Pamir Gold seeds is the best strategy for you.

Can weed grow in cold weather?

Yes, cannabis can be grown in cold climates. But do your preparation well, know when the last frost of spring and the first frost of weather are likely to arrive at your grow location and plan accordingly with some early flowering outdoor cannabis seeds.

Understand whether you are more likely to succeed with autoflower seeds or feminised seeds, and remember you can germinate and grow your seedlings indoors if the early season weather is unpredictable. Good luck with your cannabis cultivation, don’t let cold weather stop you!