Tips and products for increasing the yields of cannabis plants grown outdoors. Are you interested in growing cannabis outdoors this summer? Find out what you’ll need to get started and how to get the best yield from your plants. Growing marijuana outdoors produces a higher yield, gives your buds a unique flavor, and it's far less energy-intensive than using indoor grow lights. Outdoor cannabis plants can grow up to tall and produce of quality weed per plant–and…
Outdoor cannabis growing
How to protect guerilla cannabis plants from wild animals
Guerrilla cannabis growers are beset with challenges on all sides. If it’s not the worry of somebody discovering their secret grow plot, then it’s the danger of losing the crop to any of the various pests and pathogens that every cannabis grower must deal with, but often with the added complication of difficult access and infrequent visits to care for the plants. As well as this, guerilla cannabis plants are vulnerable to the actions of various wild animal pests which can ruin a crop very quickly, either by eating it, digging it up or trampling all over the plants. In this article, we will look at some techniques to keep your cannabis plants safe from these beasts.
In our previous blog articles, we’ve already dealt with the principal diseases and pests that attack cannabis plants, as well as outlining the basics of setting up a guerrilla cannabis grow. In this new post, we will help you to protect your precious plants from the various wild and domesticated animals that seem intent on undoing the grower’s hard work. These animal pests are varied and can include (but are not restricted to) small mice and rats which will eat germinating seeds and chew the plants’ stalks, moles and voles which tunnel around the roots and damage them, rabbits and hares which eat the tender leaves and stems, foxes, dogs and cats which will dig around the plants and use them as a toilet, wild boar which dig up, trample and eat plants, and finally, goats and deer, which, if hungry, can quickly devastate your crop.
What is Dry Farming?
The method of cultivation known as dry farming is one that is widely used in conventional agriculture (especially with cereals) and that has many advantages over traditional growing techniques when applied to cannabis. In fact, many people will have heard of rainfed crops, a centuries-old cultivation technique. Therefore, dry farming by definition is a crop that does not need to be watered by the farmer but instead grows with the water that nature provides, either through rainfall or from underground sources.
In the case of cannabis crops that are being cultivated in California by this method, more specifically in Humboldt County, they rely on the second option, since they are located near rivers, allowing the plants to absorb the water that accumulates below the ground. It may seem impossible to imagine that majestic cannabis plants can develop and deliver quality crops without the grower watering them, but it is a method that really works.
Outdoor cannabis harvest: tips and tricks
As many of you know, cannabis legalization in numerous countries has led to an increasing interest in home growing from many users who, in other circumstances, would have been forced to resort to the black market. Thanks to this, marijuana cultivation has gained numerous followers in recent years, as currently many people grow a few plants in their balconies, patios or gardens, in order to stock up on marijuana.
However, the effort made during half a year (or longer in some cases) can be ruined if you don’t take into account a series of parameters when harvesting your cannabis plants. Today we are showing you a few tricks to bear in mind to ensure you’ll get high-quality buds. Nobody likes to see how the flowers they have been taking care of for months get covered in fungi due to an error!
Cannabis and allelopathy
Allelopathy is a naturally occurring phenomenon by which certain biochemical compounds produced by an organism have a direct impact on the growth or development of other organisms. The action of these compounds can be either positive, promoting the development of other organisms (positive allelopathy) or negative, causing a series of harmful effects on some (or all) of the organisms that are nearby (negative allelopathy). The biochemical substances equipped with these properties are known as allelochemicals.
As many of you know, these properties have been studied in botany and agriculture for decades for different purposes. Thanks to this feature, certain plants can be used to inhibit the growth of other plant species and the reproduction of insects that could result in a plague, significantly reducing the use of insecticides. This is probably the most common and widespread use among farmers all over the world. Nevertheless, there are other lesser-known but very interesting interactions, like the fact that certain plants promote the production of terpenes in nearby plants. something that could be very appealing for the cannabis grower!
Common errors in the cultivation of automatic plants
Spring is getting closer, and with it, the ideal conditions for cannabis cultivation, which is why many growers are already starting to plan their outdoor grow for the season ahead, while others are planning a last indoor crop before the dreaded summer heat arrives. It’s no secret that auto-flowering cannabis seeds (also known as automatics) represent a considerable part of the varieties that can currently be found in the market, with sales increasing year upon year, thanks in large part to the excellent work done by breeders and seed banks.
Whether you grow outdoors or indoors, in this article we’re going to show you a series of tips and tricks towards successful autoflower cultivation, highlighting the typical mistakes that are usually made when growing this type of genetics and proposing alternatives that will make your grow much more efficient, with greater yields and higher quality of the final product.
Growing cannabis in harsh climate conditions
Although cannabis performs well in many latitudes, a rigorous selection of the genetics that we’re going to grow is sometimes necessary in some places in order to harvest our plants successfully, especially outdoors. In this article we will focus on two classic, adverse climate conditions: cold and humid areas – like Northern Europe – and hot and dry climates, where the different cannabis seeds won’t develop in the same way.
Cannabis strains for humid and cold climate
While high humidity promotes a lush and healthy growth, things are different during the flowering stage, when flowers can be infected by mildew and other pathogenic agents due to the effect of cold temperatures and rains. However, it isn’t impossible to grow in these regions, and many growers from places like the Netherlands, UK, Germany, Canada or even Alaska successfully harvest their outdoor cannabis crops every year, mainly thanks to an accurate selection of the genetics grown – always looking for the most resistant strains – and of course the use of greenhouses, greenhouse heaters, etc.
Before presenting you a brief list of this type of genetics, especially suited for outdoor growing in these areas for being particularly resistant to moulds, we are going to explain a few desirable traits that might ensure the best possible results.
Guerrilla growing cannabis
Growing cannabis outdoors, guerrilla style
Guerrilla cultivation is often the only available option for many growers to keep themselves supplied with cannabis throughout the year, especially for those who have no garden for outdoor growing and don’t have the possibility of cultivating indoors. The idea is simple, it’s a question of finding a suitable piece of land to grow on, in a forest, woods, or scrubland where plants can be left to fend for themselves until harvest time. Naturally, the plants need not be completely abandoned, they can receive some care and maintenance depending on how accessible the grow spot is, and how much the grower wishes to risk being caught red-handed while attending to them.
Although the success of the crop will depend largely on luck, with the plants being more or less left to their own devices for most of their life, a series of steps can be taken that, while not guaranteeing a successful harvest, can certainly help the plants to remain healthy throughout the season. In this way, guerrilla growers can harvest cannabis crops of a quality rivalling that of the most pampered outdoor gardens, where it’s far easier to provide the plants with all they need.In the following article we will outline the most important elements to consider for achieving a successful guerrilla harvest in the safest and easiest way possible.
Growing automatic cannabis plants outdoors in Smartpots
Equipment, genetics and fertilisers employed
The following article details a grow report of autoflowering cannabis strains cultivated outdoors, mostly using Smart Pots. The purpose of this report is to examine their performance when used to grow auto-flowering varieties and note their suitability to the particular demands of this type of cultivation. Smart Pots encourage vigorous root development that in consequence tends to lead to bigger plants and more abundant harvests.
We grew two plants of each of 2 different varieties in order to be able to perform a comparative test. The idea was to cultivate one plant of each variety in Smart Pots of 18 litres, which would be the “main subjects,” and then two more, one of each variety, in a smart pot of 12 litres and a circular rigid white plastic pot of 11 litres. So, we will be able to make a comparison between the different automatic seeds we have grown and how they perform in the different containers.
Soil Food Web Gardening
While it may be old news for organic gardeners, with writers like Elaine Ingham championing soil food web gardening since the late nineties and the more recent success of Jeff Lowenfels’ highly influential book ‘Teaming With Microbes’, this approach has recently been catching on with organic cannabis growers who are being won over by the vigorous vegetative growth, increased plant health and more importantly, many claim increased yield and terpene production in their flowers!
The term ‘Soil Food Web’ was coined by Elaine Ingham and refers to the relationships between the many and diverse species of organisms found living in soil. A balanced, well functioning soil food web is vital for healthy plants – most gardeners are familiar with the physical and chemical aspects of soil science – taking care to provide the plants with the correct soil type/texture and with adequate nutrition, but are often unaware of the equally important role played by soil biology in a healthy, vibrant garden – it’s all too easy to focus on the activity and growth above ground to the exclusion of everything else, but in doing so we risk ignoring the vital interactions taking place out of sight below the ground in unbelievable numbers.
Growing marijuana in plant pots
Growing marijuana in soil is, by far, the most common type of crop throughout the world. In this post, we are interested in how to optimize our soil in a simple and fast way.
How Do I Grow Cannabis Outdoors?
Growing cannabis outdoors is as much art as it is science. Many cannabis cultivators swear by indoor growing. You can control your indoor environment a lot more easily than an outdoor plot, and pests are less of a problem. Also, many states that allow growing require a person to grow in an enclosed area. Indoor grows are more practical.
Yet, outdoor grows have a number of advantages. The taste and effects that come from sungrown cannabis are often deemed superior. Some growers claim that natural sunlight develops the full range of cannabinoids and terpenes (sunlight has various wavelengths, whereas indoor grow lights are often tuned to a specific spectrum, which can limit which cannabinoids are expressed in the final product). Other advantages include potentially massive yields and the natural environment’s soil and water (although some cannabis gardeners use coco coir and nutrients or a preferred organic potted soil).
Download Free Beginner’s Guide to Growing Cannabis
The only downside is that, due to the elements, outdoor growing is fraught with the possibility of failure. Here’s how best to ensure a decent outdoor cannabis grow, barring any major environmental changes or acts of God!. If you want more precise details with regards to germination, growth cycles and nutrients, check out our post on growing cannabis for beginners. Our friends at Homegrown Cannabis Co. also have an excellent article on growing cannabis outdoors, which we highly recommend reading for an even greater understanding of growing outdoors, and the knowledge being passed on by Swami Select.
What’s Your Latitude – How Much Light Do You Get?
Latitude is key to growing cannabis outdoors successfully. Where you’re located geographically will determine what time of year you plant and how much light you get everyday. Choosing an ideal cannabis seed suited to growing in that environment is also crucial. Here’s a rough guide:
The Northern Hemisphere, 25°N – 50°N: Most cultivators start their grow by the end of March to the beginning of June, which is when the plant vegetates and forms preflowers that you can separate into males and females. The longest day in the year occurs between 20 and 23 June (summer solstice), which is when the plant starts flowering. The shortest day (winter solstice) is between 20 and 23 December. Most outdoor grows are harvested between September and November.
Mediterranean climates are ideal for growing in this region. It is often possible to grow two large crops per year in such environments when done right, including long-flowering sativas. Outdoor varietals like Taängie (California Orange x Skunk #1) or Chocolope x Kush do extremely well in such regions.
Further North, and you may want to go for more indica-leaning and autoflowering varieties like Hawaii x Purple Skunk, Critical x No Name or Early Skunk x Northern Lights may be better choices.
The Southern Hemisphere, 25°S – 50°S: The growing season starts between September and October, although some growers plant as late as December. Harvest time is between March and May. Outdoor growers can harvest up to two large yields per year in a good growing season. You can grow similar strains to the ones mentioned above, just mirror-flipped for the South.
If you go too far North or South, outdoor growing becomes extremely difficult if not outright impossible, as there’s not enough light and temperatures are too low. With that in mind, there are some hardy strains that may do well in climates that are a little further than the 50°N or 50°S borderline, like Hindu Kush, which can withstand harsh, windswept mountainside regions. Master Kush may also do well, but has a slightly longer vegetative period. Autoflowering varietals mixed with such Kush genetics could be ideal.
Intertropical Zones & Equator: Lies between Tropic of Cancer and the Tropic of Capricorn, and receives an even 12 hours of light and 12 hours of dark per day. These regions are perfect for large equatorial sativa varieties. Cannabis can be grown year-round.
Cannabis ruderalis (autoflowering cannabis strains): Native to Central and Eastern Europe and Russia, this type of cannabis is dependent upon age rather than the light cycle to mature and flower. Autoflowering varieties can be grown from seed from June in the Northern Hemisphere and January in the Southern Hemisphere. A long vegetative period is not needed. Yields are usually lower, but is an excellent introduction to outdoor growing for beginners. Even experienced cultivators grow autoflowering varieties alongside their Cannabis sativa counterparts, due to their reliability and high CBD content.
Best Soil for Growing Cannabis
The best type of soil is loamy soil, which is a combination of sand, silt and clay soils, with a slightly acidic pH of between 5.5 and 7.0. Loamy soil is ideal for water retention, drainage and nutrient content. Some growers add bat guano as a natural fertilizer, fungicide and compost activator, speeding up the decomposition process. Many states have pockets of loam soil, including Ohio, Illinois, California, Oregon and Wisconsin. Many cannabis gardeners tend to buy their loam soil.
If you are fortunate to have plenty of earthworms in your natural soil, then count your blessings and grow away – earthworms are a sign that your soil is healthy and nutrient-rich!
Growing Cannabis in Coco Coir
Coco coir is a natural fiber extracted from the outer husk of coconut, and is an alternative medium to growing in soil. Coco Coir is mixed with sand, compost and fertilizer to make good quality potting soil, and has an acidic pH of 5.5 – 6.5. Coco coir is also inert; it contains no nutrients. All needed fertilizer must be added.
Watering a Cannabis Grow
Too much water can drown plants. Too little can dehydrate them. Any rain will water outdoor cannabis plants naturally, but you may still need to water your plants. A good standard is one gallon of water per day for each pound of processed flower you expect to harvest from each plant. Water accordingly.
Best Temperature Range for Cannabis Grows
Ideally, temperatures shouldn’t fall below 12℃ or above 30℃. Some form of shelter from excessive heat or torrential downpour can be helpful; a temporary tarpaulin or a greenhouse is ideal.
Wind and your Cannabis Plants
Limited wind can provide a cannabis plant with beneficial stress, helping it grow stronger. Too much wind, however, can knock plants down. You may need to erect barriers or fences. If you plan on mulching, go for heavier substrates pinned down with rocks, as opposed to straw and sawdust. Mulch is a thick layer of material placed over the soil and around plants, used to suppress weeds and lock moisture into the soil, while acting as a physical barrier to drying winds and direct sun.
Consider Other Light Sources
Can you ensure that your cannabis plants will receive the appropriate 12 hours of dark time during the flowering period, and that there won’t be other light sources (e.g. street lights, light pollution from buildings and cars) that prevent your crop from flowering, or cause your female seeds to hermie (produce male parts and self-pollinate)? Appropriate dark time is essential for growing cannabis successfully and getting a bumper yield.
Cannabis Plant Genetics
Choosing the appropriate type of seed for the environment you are growing in is the best way to ensure you get the best out of your plant. Equatorial sativas are not ideal for growing in cooler climates, where indicas and autoflowering strains may be a better bet. A landrace variety of cannabis from, say, Brazil may not be ideal to grow outdoors in the middle of Massachusetts! There are many examples of great, vigorous outdoor cannabis varieties available here.
For most people wanting to grow something sturdy and reliable, a well-established hybrid like Skunk #1, Blue Dream or Gorilla Glue could be better choices. Leave the rarer and unique cannabis strains for the more advanced growers, who may end up making a seed stock that’s more reliable in a few years’ time! Check out our post on where to buy cannabis seeds if you want to find the genetics right for you.
In What Sort of Outdoor Spaces Can I Grow Cannabis?
There are many locations where you can grow cannabis outdoors (except perhaps the front lawn!). These include:
The Balcony: If south-facing, can receive plenty of sunlight. The fresh air and breeze can provide some stress training. However, growing on an extremely high balcony may prove too windy, and you cannot grow well on a north-facing balcony.
Rooftop or Terrace: Receive sunlight all day long, plenty of rainwater, and much easier to conceal than balcony grows. However, rooftop grows are exposed to lots of heat and wind, and plants can be susceptible to being blown away or drowned during storms. Rooftop cannabis cultivation is more exposed to the view of any police helicopter cameras (the “eye in the sky”); so using other plants and camouflage is important for open sky grows.
The Garden: Growing naturally outdoors in your own garden can provide one of the most satisfying feelings. If there’s plenty of space, you can grow many different plants together in a polyculture, which can improve the soil and control pests, weeds, and disease without major chemical inputs. However, garden grows are also more susceptible to pests and mold. You can grow in pots in the garden, or a garden bed with loamy soil.
Greenhouses: Greenhouses can provide the best aspects of both indoor and outdoor growing, with natural light provided by the sun and protection from some pests and the more extreme elements. However, greenhouses must be properly ventilated in order to prevent stale air and humidity buildup. Plants may also become stressed and overheated during heatwaves.
Guerilla Growing: This is growing outside of a person’s own property, ideally somewhere concealed and out-of-the-way. Guerilla Growing is one of the cheapest ways of cultivating cannabis. You are letting nature do most of the work. You also don’t have to worry about being caught with cannabis on your own property, which can be an issue. However, in states where it is legal to grow cannabis, it is probably more of a legal risk to grow in a place not your own. You also run the chance of someone else stumbling upon your crop and co-opting or destroying your efforts.
Why Grow Cannabis Outdoors?
Growing cannabis outdoors can be a bit of a challenge. We certainly advise most beginners to grow their first cannabis indoors in order to develop a greater understanding of the plant’s growth cycle. Still, few cannabis related activities are more satisfying than harvesting a large, sungrown crop that produces a yield large enough to ensure you will probably not need to grow again for another year, let alone go to a dispensary or other vendor.
Download Free Beginner’s Guide to Growing Cannabis
Well-planned outdoor cannabis grows may also reduce your carbon footprint, reduce or eliminate any non-organic pesticide or fertilizer use and save you cash, making it the better choice for cannabis consumers who are more environmentally conscious. And for anyone who is finding it difficult to get their outdoor setup running, enlisting some advisors and an outdoor grow kit will make your work simpler!
Article written by
Dipak Hemraj Head of Research and Education
Dipak Hemraj is a published author, grower, product maker, and Leafwell’s resident cannabis expert. From botany & horticulture to culture and economics, he wishes to help educate the public on why cannabis is medicine (or a “pharmacy in a plant”) and how it can be used to treat a plethora of health problems. Dipak wants to unlock the power of the plant, and see if there are specific cannabinoid-terpene-flavonoid profiles suitable for different conditions.
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How to Grow Cannabis Outdoors
This article was co-authored by Jamie Corroon, ND, MPH. Dr. Jamie Corroon, ND, MPH is the founder and Medical Director of the Center for Medical Cannabis Education. Dr. Corroon is a licensed Naturopathic Doctor and clinical researcher. In addition to clinical practice, Dr. Corroon advises dietary supplement and cannabis companies regarding science, regulation, and product development. He is well published in the peer-review literature, with recent publications that investigate the clinical and public health implications of the broadening acceptance of cannabis in society. He earned a Masters in Public Health (MPH) in Epidemiology from San Diego State University. He also earned a Doctor of Naturopathic Medicine degree from Bastyr University, subsequently completed two years of residency at the Bastyr Center for Natural Health, and is a former adjunct professor at Bastyr University California.
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Growing marijuana outdoors produces a higher yield, gives your buds a unique flavor, and it’s far less energy-intensive than using indoor grow lights. Outdoor cannabis plants can grow up to 14 feet (4.3 m) tall and produce 4–8 pounds (1.8–3.6 kg) of quality weed per plant–and it’s not rocket science to grow cannabis outdoors. We’ve put together a comprehensive guide to tell you everything you need to know about picking a location, germinating marijuana seeds, and maintaining your crop to get the highest possible cannabis yield.