Tips For Growing Autoflower Cannabis Outdoors - RQS Blog (2024)

Contents:

  1. Before you start — planning your outdoor auto grow
  2. When to plant your autoflowers outdoors
  3. How to grow your outdoor autoflowers
    1. 1. germinate your autoflowering seeds
    2. 2. prepare your planting container or growing spot
    3. 3. watering and nutrients for your outdoor autoflowers
    4. 4. harvesting your crop
  4. Common problems when growing autos outdoors
    1. Pests
    2. Animals taking a liking to your crop
    3. Discovery of your crop by other people

Autoflowering cannabis strains are awesome. They grow fast and easy, and they fit pretty much everywhere because of their compact size. Although autoflowers are great for growing indoors, you can make the most of them with some love from Mother Nature outdoors.

Just a few years ago, many cultivators didn’t take autoflowers seriously. They saw them as something suited for beginners, as the first autoflowering varieties couldn’t really match the yield, aroma, and potency of photoperiod strains. But this has changed significantly in recent years. Modern autoflowers have great yields, and their buds are of a quality that rivals photoperiod strains. As such, it only makes sense that cultivators are growing these strains outdoors to make the most of their key features. Here are some benefits of outdoor-grown autos:

Sunlight means better yields and fatter buds
• You can achieve several harvests in a single growing season
• You can grow them outdoors at any time of year (weather depending)
• They are less susceptible to pests due to faster growth
• They fit in tiny spaces on your balcony, terrace, or garden
• They are ideal for stealthy outdoor grows/guerrilla grows due to their small size

BEFORE YOU START — PLANNING YOUR OUTDOOR AUTO GROW

One of the advantages of autos is their fast growth. Someautoflower strains can deliver their goods in an amazingly short 50–55 days from the moment you plant your seed. Although their very fast growth is normally an advantage, it also means that autos are less forgiving when it comes to certain mistakes, as you simply don’t have the time to correct things as you would with photoperiods. Likewise, if any major issues happen over their short lifetime, from diseases and overwatering to pests and whatnot, this will also greatly diminish your yield.

To avoid this, you want to carefully plan your autoflowering outdoor grow so your girls can reach their full potential in the short time they have. Before anything else, consider the viability of your location. What’s the climate like? Are you planning to plant your seeds directly in a garden bed or in containers? What type of nutrients will you use? Will your plants get enough sunlight? Will you be able to attend to your plants, or are you growing in a remote location where you can’t visit often?

For instance, if you happen to live in a colder, rainier climate, you may want to choose an autoflowering strain that doesn’t mind cooler temperatures and is also resistant to mould. Even these simple considerations can be enough to help you optimise your grow and avoid disaster.

WHEN TO PLANT YOUR AUTOFLOWERS OUTDOORS

Photoperiodic cannabis relies on natural daylight hours for its vegetative and flowering stages. You normally plant seeds in late spring where they will veg until late summer when the shorter daylight hours force them into flowering. By the end of summer/early fall, they will be ready for harvest.

The beauty of autoflowers is that they don’t rely on daylight cycles, which means you can plant and harvest autoflowers any time you want. If you live in a climate where there is no frost, such as in the Mediterranean, you can, in principle, grow autoflowers all year round.

Then again, cannabis, including autoflowers, grows best when it can get at least 10–12 hours of sufficient sunlight. As such, it is still best to plant seeds in spring, sometime from late April to early May in Europe, as the days are already longer, which will benefit your plants’ growth. You can then harvest in late July and start another crop in early August, which will be ready in October. If you happen to live in a warm climate with no frost, you can reap up to four harvests in one single year!

If you live further north, you may want to avoid the coldest and rainiest months of the year. In these climates, you can plant your autoflowers sometime in late spring when you know there is no danger of frost. The exact time depends on where you live, and could range from April to early June. The shorter summer in a colder climate is also a factor you need to think about. You shouldn’t sow too late either, as you want to avoid flowering your weed into the rainy season. If you live somewhere with a rainy fall, it can be good to plant in early June, so you can harvest late in August. This way, you can beat the bad weather and your buds won't fall victim to mould.

Bottom line: The best time to plant will depend on the climate where you are growing. Ensure your plants can get plenty of sunlight, and make sure to avoid frost and extensive rain.

Tips For Growing Autoflower Cannabis Outdoors - RQS Blog (1)

HOW TO GROW YOUR OUTDOOR AUTOFLOWERS

These days, you can find many great varieties of autoflowering cannabis seeds. Check out Royal AK Automatic, Amnesia Haze Automatic, Northern Light Automatic and the many other great autoflowers at Royal Queen Seeds. Once you find a strain you like—one that will grow well in your climate—you can get started with your outdoor grow.

1. GERMINATE YOUR AUTOFLOWERING SEEDS

You can germinate your autoflowering cannabis seeds just like you would photoperiod seeds. Some cultivators like to germinate using the “paper towel method” or by putting seeds into a glass of water. But you can also plant your seeds right into their final container. Know that re-potting autoflowering cannabis is not recommended, as the transfer from a smaller to a larger pot can slow its growth. Since the growing time of autos is already limited, you want to avoid this as it can lead to a decreased yield.

For best results germinating your autoflowering seeds, we recommend the Starter Kit Autoflowering. This kit comes with everything you need to give your cannabis plants the best possible start in life.

Tips For Growing Autoflower Cannabis Outdoors - RQS Blog (2)

2. PREPARE YOUR PLANTING CONTAINER OR GROWING SPOT

If you are growing your autoflower in a container, make sure that you choose a big-enough pot. Although autoflowers can normally do well with smaller pots compared to some of the larger photoperiod ladies, you still don’t want to restrict their growth. A pot that holds 7–15 litres will do. Again, keep in mind that your chosen pot will also be your final pot.

If you don’t use a container and want to plant directly in soil instead, know that the outdoor soil at your chosen location may not be optimal. The natural soil will likely not have sufficient nutrients, and it may drain poorly and/or contain harmful microorganisms that adversely affect the growth of your plant. For these reasons, outdoor growers often first dig holes for their outdoor plants, which they fill with a suitable substrate before planting their seed.

Tips For Growing Autoflower Cannabis Outdoors - RQS Blog (3)

3. WATERING AND NUTRIENTS FOR YOUR OUTDOOR AUTOFLOWERS

As autoflowers normally grow to a smaller size, they will not need as much water as a vigorous photoperiod sativa, but you still want to make sure that your outdoor auto has enough to drink. How much and how often you need to water will once again depend on your climate and the needs of your individual plant. Just like with any other type of cannabis grow, you want to avoid overwatering in particular, although underwatering isn’t ideal either.

As for nutrients, here too you will want to be careful with how much you administer. You can always start with ½ or ¾ doses of nutes to make sure you’re not overloading your plants. You can also consider slow-release nutrients. These can be ideal when you grow outdoors in a location that you can’t always visit. When you amend your substrate with slow-release nutrients, your plant will get everything it needs, and you won't need to bother feeding it. All you need to do is water.

Tips For Growing Autoflower Cannabis Outdoors - RQS Blog (4)

4. HARVESTING YOUR CROP

Some autoflowers can be ready in a short 50–60 days, but there are also those that take longer, up to 80 days. Just like with photoperiod strains, you’ll know that harvest time is close when the initially white pistils on the buds start turning brown. To really see when it’s time to harvest, you should examine the trichomes of your cannabis plant. Trichomes are tiny, mushroom-shaped outgrows on the buds and sugar leaves of your plant. During growth, trichomes are crystal-clear at first. Later in flowering, the trichomes turn a milky white colour, then around harvest time, they turn from white to amber. You can’t really see the trichomes with the unaided eye, so use a jeweller’s loupe to get a close look at them. Cultivators often harvest when a certain percentage of the tiny “bubble heads” of the trichomes turn amber. At this point, the leaves of your plant will normally have started to turn yellow.

When you're ready to harvest, swiftly cut the branches with the buds off of your plant, and don’t waste a lot of time drawing unwanted attention. Once you’ve safely brought home your harvest, you can trim the buds further. Alternatively, you can hang the branches with buds still attached for drying.

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Tips For Growing Autoflower Cannabis Outdoors - RQS Blog (6)

COMMON PROBLEMS WHEN GROWING AUTOS OUTDOORS

Growing outdoors can come with its own potential problems. Unwanted discovery of your weed out in the wild is one of them, but there is also the risk of animals and insects taking a liking to your crops. Here’s what you can do about it.

PESTS

Fortunately, autoflowering cannabis varieties are somewhat less prone to pests and insect infestations. In fact, some autoflowering varieties are bred to have a particularly strong resistance against mould and pests. Likewise, due to the short life cycle of autoflowers, insects often don’t have the time they need to become a serious problem. Otherwise, if you notice an insect infestation such as aphids or whiteflies, no need to go all synthetic about it: insecticidal soap and neem oil can deal with most common cannabis pests in a safe and natural way.

ANIMALS TAKING A LIKING TO YOUR CROP

If you grow outdoors, chances are your crops may also attract the attention of animals such as birds, cats, or deer. If you grow somewhere where cannabis-loving critters are roaming about, you may want to protect your plants with cages made from chicken wire or bamboo stakes.

DISCOVERY OF YOUR CROP BY OTHER PEOPLE

Your precious plantation may also be at risk if someone discovers it. Someone may snatch your plants or you may get in trouble for growing. The smaller size of autoflowers already helps reduce the risk of accidental discovery. To further reduce the risk, choose a remote growing spot some distance away from paths and other public places, where it’s unlikely that someone would come around. With autoflowering varieties that are low in odour, you can further mitigate the risk for discovery. When you plant your weed together with companion plants such as herbs, flowers, or vegetables, you not only camouflage your grow and keep it hidden, but also prevent pests from taking hold while improving the surrounding soil.

With these tips, you can look forward to a bountiful harvest from your autoflowering cannabis outdoors.

Happy growing!

Tips For Growing Autoflower Cannabis Outdoors - RQS Blog (2024)

FAQs

How long do Autoflowers take to grow outdoors? ›

Do autoflowers take longer outdoors? Yes, they might take slightly longer outdoors. However, it shouldn't be that noticeable—most autoflowering seeds take 8 to 12 weeks to grow fully, and your outdoor ones might be on the higher end of that range.

How much light do Autoflowers need outdoors? ›

Similar to photoperiod cannabis strains, automatics love strong sunlight. Growing autoflowers outdoors requires at least 10 hours of sunlight per day, but 16 hours a day ensures excellent yields and potency. The regular planting season is between April and late July, depending on where you reside.

Do Autoflowers need 12 12? ›

Autoflower plants don't have a photoperiod dependency that requires daily light to be 12 hours (or less) in order to bloom. Apart from that, autoflowers grow like normal cannabis, producing the same terpenes and cannabinoids.

How tall do Autoflowers get outdoors? ›

Autoflowering Cannabis plants will have a tendency to finish flowering at a height of 60-100cm. This means it is possible to grow a large number of Cannabis autos discreetly in the comfort of your back garden, polytunnel, greenhouse, or sunny roof terrace or balcony.

How much does an outdoor autoflower yield? ›

If you have access to these conditions, you can expect a rewarding outdoor autoflower yield of around 150–175g/plant; genetics and climate will affect these numbers. However, if you have to make do with a shaded spot with significantly less sunlight, reel in your expectations to around 50–100g/plant.

How often should you water Autoflowers? ›

As your autoflowers get bigger, they need more frequent watering and larger quantities. During the germination and seedling stages, give each plant 3-7 ounces every 4-7 days. During the vegetative stage (when your autoflowers are growing leaves and branches), give each plant 10-20 ounces every 2-4 days.

How far should light be from autoflower? ›

Most lights are placed at a distance of at least 18-22 in (46-56cm) away from seedlings, and you can do that too. Once you observe how the plants react, you'll be able to judge the distance yourself. Autoflower seedlings need to be observed much more because the plants can get stunted if the tender leaves get burnt.

What temp do Autoflowers like? ›

Autoflowers thrive with day temperatures around 23–28°C (73–82°F) and a drop of no more than 5–10 degrees at night. The humidity should be ideally between 40 and 60%. Ruderalis genes presumably make autoflowers more cold-resistant.

Can you give Autoflowers too much light? ›

Normally growers give autoflowers this light cycle when they have them growing in the same tent as photoperiods. By giving your autos 12/12 you're not growing them to their full potential.
...
Cons:
Autoflower grow light schedule pros and cons
Light ScheduleProsCons
24/0Faster growth.May be too much for some strains.
3 more rows
17 Jun 2022

How do you maximize autoflower yield? ›

Don't worry; we have five tricks you can pull to achieve the best results with your autoflower yields.
  1. Grow Indoors. ...
  2. Grow Your Autoflower Seeds in The Pot Where You'll Harvest Them. ...
  3. Don't Feed Your Autoflower Plants Excessive Nutrients. ...
  4. Give Your Plants the 18/6 formula When it Comes to Light. ...
  5. Add a Root Stimulant.
5 Aug 2021

What nutrients do Autoflowers need? ›

What Nutrients Should I Use for Autoflowering Cannabis? The three most important macronutrients for growing cannabis, including vegetative growth, are nitrogen (N), phosphorus (P), and potassium (K). Most fertilizers are labeled with an N-P-K ratio showing how much of these nutrients they contain.

What is the biggest yielding autoflower? ›

The highest yielding autoflower is Green Crack . This autoflower produces yields of up to 650g per square meter after only 9 weeks from seed to harvest.

Should you train outdoor autos? ›

Many cannabis growers hesitate to train their autoflowering cannabis plants because they worry about slowing down growth. Typically, an autoflower does very well without training but for those who want to make the most out of each seed, it's possible to get even better yields by using training techniques.

What is the best outdoor autoflowering strain? ›

Autoflowering Seeds for Outdoor Growing
  • Auto Super Lemon Haze.
  • Auto Purple Kush.
  • Auto AK-47.
  • Auto Lemon Skunk.
  • Girl Scout Cookies.
  • Jack Herer.
  • Blueberry.
  • Critical Mass.
28 Jun 2019

How tall should autoflower be before flowering? ›

Most reach an average autoflower height of around 50-100cm. The final autoflower size depends on the genetics and the growth conditions which you provide. Sativa autoflower seeds can stretch a little more than indica autos.

Should you top outdoor Autoflowers? ›

In simple terms, autoflowers can indeed be topped but it is not often recommended. Many autoflower growers have never topped a plant and would be cautious about ever doing so.

How many Autoflowers grow in a 4x4 tent? ›

Most growers will choose to grow 8-12 plants in a 4×4 tent.

Do Autoflowers do better inside or outside? ›

Autoflower plant growing in indoor grow operations is the industry standard and because of the ruderalis genetics these plants usually stay small so they can be grown in small spaces and because they are very stress resistant almost anyone with no experience can manage to get a couple of grams in in their first grow.

What water is best for Autoflowers? ›

Tap water, reverse osmosis, and distilled water are some popular choices for watering your autoflowers. Distilled water, in particular, is excellent for your autoflowering cannabis plants for a few reasons.

What is the best soil for autoflowering plants? ›

Peat moss and compost are essential ingredients for autoflowering cannabis soil, making this the perfect potting mixture for your plants to thrive.

Is rainwater good for Autoflowers? ›

The Best Type of Water for Autoflowers

Most growers don't overthink and simply use tap water for their cannabis plants, but it's also possible to use rainwater, as it's free from salts and other chemicals found in tap water.

How many watts does an autoflower need? ›

Usually, you would need around 75 W per plant, so by following the table we can calculate how many watts we would need for 30 plants in a 6 square meter (64.5 ft2) space.

What is the best light for autoflower? ›

The best light spectrum for autos and photos is a full-spectrum. That's why it's essential to choose your cannabis light spectrum carefully, we recommend using a mixed light spectrum of warm and cold light bulbs (CMH and HPS) or a full-spectrum LED during the whole lifecycle of your autoflower.

How many hours of light does an autoflower need? ›

18/6 LIGHT CYCLE

And since autoflowering plants have short vegetative phases and often grow shorter than photoperiod strains, you'll typically want to give your autos at least 18 hours of light. This allows for robust growth, without overspending on energy.

Can you grow Autoflowers outside in winter? ›

Generally, autos grow in a range from 15 to 25°C and may be able to grow in colder climates depending on the overall conditions, so it's possible to grow autoflowers in winter. Cannabis plants love temperatures in that range, it helps even more if there's a bit of wind.

Do Autoflowers need humidity? ›

For this reason, autoflowers in the seedling stage require higher humidity levels; with their roots yet to grow, higher humidity allows seedlings to absorb water through their leaves. For this reason, we recommend keeping humidity levels between 65-70% during the seedling stage of the growing cycle.

Can you grow Autoflowers without nutrients? ›

IS IT POSSIBLE TO GROW AUTOFLOWERS WITHOUT NUTRIENTS? In principle, yes. It may be possible to grow an autoflower from seed to harvest without giving any extra nutrients. But this can come with some downsides: lower yields and lower-quality cannabis.

How many days do Autoflowers take? ›

The average time it takes for an autoflower seed to grow and reach harvest is around 75 days. This can partly depend on the specific phenotype as well as environmental conditions.

Can LED grow lights burn plants? ›

While LED lights do produce some heat, they deal with that heat more effectively than other light types. Plants can grow much closer to LEDs than other lighting types because of this. Usually crops can grow right up to the light without burning.

What is a super autoflower? ›

Super autoflowering cannabis or also called super autos are the newest development in autoflowering genetics. These auto plants are called super autos, because they can match the strength, potency and yield with regular cannabis Indica and sativa strains.

How do I get my Autoflowers to grow big buds? ›

10 tips for bigger autoflower harvests
  1. Pick the right strain. ...
  2. Germinate autos in their final pots. ...
  3. Stick to an 18/6 light schedule. ...
  4. Avoid high-stress training. ...
  5. Try sea of green (SOG) ...
  6. Get the nutrients right. ...
  7. Avoid overwatering. ...
  8. Encourage healthy soil.
11 Aug 2022

Should you trim fan leaves on autoflower? ›

Also, it's not necessary to only remove fan leaves that are located at the lower nodes. The idea is to ensure that the canopy receives a uniform distribution of light. Thus, you can also remove leaves that are obstructing the growth of the buds situated down below. And, you do this even if they are at the top.

Do Autoflowers take longer in bigger pots? ›

Basically, a smaller pot means a smaller plant so you need to experiment with what pot sizes are good for your autoflower grow and stick to that one size because transplanting autoflowers will decrease their yields therefore it is best to start them in the container that they will be grown in!

How often should I feed my autoflower? ›

Nutrients in soil

If you are growing very fast-growing autoflowering strains that can be done in less than two months from seed then the premium soil will almost able to supply your auto plant with the necessary amounts of nutrients and you will probably need to feed them only once or twice.

Should I use nutrients every time I water? ›

You don't want to use liquid nutrients every time you water—use them every other watering, or two waterings on, one off. It depends on the complexity of your soil and the health of your plants. Too many nutrients will damage your plants. Giving weed plants the proper amount of nutrients requires careful monitoring.

Do autoflowering plants need darkness? ›

Autoflowering plants do not need darkness

As autoflowering plants are not dependent on changes in the light cycle to commence flowering, they can successfully be grown using a lighting cycle of anything from 16/8 to 24/0.

What is the easiest autoflower to grow? ›

Easiest Autoflowers Strains to Grow in 2022
  • Northern Lights Autoflower Strain.
  • Afghan Autoflower Strain.
  • Bruce Banner Autoflower Strain.
  • Gorilla Glue Autoflower.
  • Girl Scout Cookies Extreme Autoflower.
  • Sour Diesel Autoflower.
  • Zkittlez Autoflower Strain.
20 Dec 2021

What is the fastest autoflower to grow? ›

With a lightning-quick flowering time of only six weeks indoors and 5–6 weeks outdoors, Green O Matic is regarded as the world's quickest autoflowering marijuana. The quick and long-lasting effects of this marijuana, combined with its mildness, make it a fantastic choice for daytime use.

Do commercial growers use Autoflowers? ›

Autoflowers are the most popular variety in amateur growing but play no role in commercial cultivation.

Can you plant Autoflowers outside? ›

They grow fast and easy, and they fit pretty much everywhere because of their compact size. Although autoflowers are great for growing indoors, you can make the most of them with some love from Mother Nature outdoors.

Do Autoflowers do better inside or outside? ›

Autoflower plant growing in indoor grow operations is the industry standard and because of the ruderalis genetics these plants usually stay small so they can be grown in small spaces and because they are very stress resistant almost anyone with no experience can manage to get a couple of grams in in their first grow.

How many hours of light do Autoflowers need? ›

And since autoflowering plants have short vegetative phases and often grow shorter than photoperiod strains, you'll typically want to give your autos at least 18 hours of light. This allows for robust growth, without overspending on energy.

What is the best outdoor Autoflowering strain? ›

Autoflowering Seeds for Outdoor Growing
  • Auto Super Lemon Haze.
  • Auto Purple Kush.
  • Auto AK-47.
  • Auto Lemon Skunk.
  • Girl Scout Cookies.
  • Jack Herer.
  • Blueberry.
  • Critical Mass.
28 Jun 2019

How do you maximize autoflower yield outdoors? ›

7 Tips and Tricks to Maximize Yields in Autoflowers
  1. 1) Prepare ahead. ...
  2. 2) Don't take the risk of transplanting. ...
  3. 3) Choose containers that drain well. ...
  4. 4) Reduce nutrient strength. ...
  5. 5) Keep an eye on the pH. ...
  6. 6) Light cycle. ...
  7. 7) Use proper training techniques.
4 Feb 2019

What temp do Autoflowers like? ›

Autoflowers thrive with day temperatures around 23–28°C (73–82°F) and a drop of no more than 5–10 degrees at night. The humidity should be ideally between 40 and 60%. Ruderalis genes presumably make autoflowers more cold-resistant.

Should you train outdoor autos? ›

Many cannabis growers hesitate to train their autoflowering cannabis plants because they worry about slowing down growth. Typically, an autoflower does very well without training but for those who want to make the most out of each seed, it's possible to get even better yields by using training techniques.

What is the best soil for autoflowering plants? ›

Peat moss and compost are essential ingredients for autoflowering cannabis soil, making this the perfect potting mixture for your plants to thrive.

How many days do Autoflowers take? ›

The average time it takes for an autoflower seed to grow and reach harvest is around 75 days. This can partly depend on the specific phenotype as well as environmental conditions.

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