Growing Marijuana outdoors is one of the best pleasures in life. The local climate plays a big part along with many other variables, below is a list of key points and tips to consider when growing Marijuana outdoors.
Growing Marijuana Outdoors: Location
The location where you are growing marijuana seeds is a big player in the outcome of your yields. We have a clear overview on our website of which zone is most suitable for each outdoor strain and auto flowering strain. There are certain strains that are better suited for hot sunny climates and some that will perform just as well in colder climates like The Netherlands.
When Do Most Photoperiod Plants Begin To Flower?
Indica varieties will begin to show signs of pre-flowering and stretching earlier than varieties that are more Sativa dominant. Plants need certain light cycles to induce the hormone production that triggers flowering. A plant can be kept in a vegetative state as long as it receives more than 12 hours of light. In nature the daylight hours are at their longest during the months of June and July. As August gets closer, many varieties will display a burst of white pistil pre flowers whilst stretching, indicating that the blooming cycle has been induced. Sativa varieties can take longer to show initial signs of flowering and also naturally take longer to bloom and ripen. If you are growing Marijuana outdoors in a tropical environment that receives a lot of light, both Indica and Sativa varieties will start flowering around August. Indica varieties will finish their flowering cycle by mid September. Sativa varieties will take 12 weeks to finish flowering and fully ripen, these can usually be harvested towards the end of October.
South Facing Is What You Want
In the northern hemisphere, the sun will always set in the south, so if you can grow Marijuana outdoors in a south facing location you can ensure your plants receive the most light possible. The hottest part of the day will be from 12pm until 3pm, after this point you want the plant to receive as much light as it can. In the evening the light will be less intense than throughout the day, however an extra few hours of sunlight every day will make a huge difference over the upcoming months.
Growing Marijuana Seeds Under Direct Sunlight
If you are germinating Cannabis seeds directly into the soil or growing medium and begin to grow directly in the sun, this can be the perfect start in many ways. Firstly the soil is gently heated to an optimum temperature to promote root development. Another reason is that the amount of lumens the sun produces is the highest you can achieve. Therefore as long as the actual temperatures are not too cold or too hot, seedlings can be grown under direct sunshine in any of the zones indicated on our website.
What Temperatures Are Too Hot And Cold For Growing Marijuana?
The temperature of the environment is a huge factor in root growth, plant growth, vigour and overall yield. When growing Marijuana indoors, the objective is to replicate the outdoor environment indoors. Therefore your daytime temperatures during the growing phase should be 22-25 °C and 17-19 °C at night.
Growing Marijuana outdoors can be more difficult depending on where you live. Temperature can strongly affect root growth if it is too high or too low. Avoid temperatures below 10 °C if you are in a colder climate, especially if the plant has just been watered. In hot climates, temperatures over 30 °C can cause serious stress and humidity issues and slow down plant growth. High temperatures can also encourage excess transpiration and can cause the plant to adapt to these dry conditions by slowing down its metabolism.
Starting Them Off Right
As spring approaches, it is a good idea to start your plants off indoors for the first week rather than planting directly outside. This is to give them the best possible start and to ensure they are protected from any insects or bugs that may want to harm the plant in this early stage. When growing Marijuana outdoors, there is nothing worse than discovering your freshly germinated seedlings have been eaten overnight. A good way to ensure that the young plants stay protected is to place large plastic cups over them during the night. This way you can sleep knowing that during this important time in the plant’s life, there are no unnecessary setbacks caused by nature.
Pot Size And Growing Medium
If you are growing Marijuana in pots then selecting the final pot size can usually determine the final size of the plant once flowering. A good way to think about this is the bigger the pots and root ball size, the bigger the yield. It is a good idea to prepare a final medium you will transplant into for the flowering stage. Ensuring excellent drainage is a big part of forming healthy roots that can breathe inside the medium. Below is a list of all the potential growth media that can be incorporated when growing Marijuana outdoors:
- Worm Castings
- Bat Guano
- Volcanic Rock
- Dry seaweed
Training Your Plants To Grow Right
Growing Marijuana outdoors means you will not be able to completely control the environment, which can cause your plants to grow into shapes and sizes that are not desirable for your current grow and may affect yield. Fortunately there are numerous methods to modify the appearance, growth pattern and yield of the plant, a list of these plant training techniques is provided below:
Low Stress Training (LST): When tying down the plant, it is a great idea to use metal wire to anchor the plants down into the ground. The closer to the ground the plant is, the more room you have to play with. Many plants that grow taller should be pinned back down and spread out to grow openly.
Super Cropping: A good time to supercrop and snap the plant stem, is at the same time as the tying or pinning. Alternatively you can tie the plant to a support like a piece of bamboo or fence. Once the plant has a support, you can snap the stem and allow it to recover and form a thick knuckle over the breaking point of the stem.
Topping: This means reducing the plant height and promoting more lateral growth. The best time to pinch and top the plant is during the vegging phase. When growing Marijuana outdoors, this will refer to the stage from April to July.
Something that is often overlooked when growing Marijuana outdoors as well as indoors is managing the root ball, air pruning is the way that existing roots grow new roots and create a large root mass. When a root detects there is low humidity, it will split similar to a plant forming a new shoot after topping. Root pruning is done naturally but using felt pots or any pot with a lot of holes in the side can really make a difference in terms of growing a heavy feeding plant. The roots will naturally be pruned as long as there is fresh air circulating in and around the pots.
A simple way to air prune roots is to take a plant pot and add a hole every inch of the pot. Air pruning should be done throughout the grow, from the start of the grow until the final pot.
Growing Marijuana Outdoors: Genetics
Now that you have discovered the many techniques that can be used when growing Marijuana outdoors, the other big player is which genetics you will be growing. This is the part where you need to calculate which strains can finish flowering before the weather turns bad during autumn. When growing Marijuana outdoors, short flowering Indica strains will be best suited for people who have shorter summers whereas almost any strain can bide well in the generous climate around the Mediterranean.
Tip: Spend time to research the genetics of the strains you want to grow. Outdoor growing is a long term commitment and it is best to know everything about a strain before spending time and money, certainly considering the added risk factors compared to growing indoors. Everything you need is only a click away and it could not be easier to start your venture of growing Marijuana outdoors. Because Spliff Seeds is a Dutch company, we take pride in the fact that we have bred many different lines of Cannabis that are suitable to grow outdoors even in our suboptimal climate.
A Recommended Indica To Grow Outdoors
Our Lemon Cream Kush Automatic is a Medical Kush x Dutch Automatic cross that has very strong resistance to mould and bud rot. Similar to the Medical Kush, this very reliable variety will smell pungent and have a powerful skunk and kush aroma. Expect yields of fluffy kushy buds in 10 weeks and a low profile plant of 60-80 cm tall. Yields of 40-60g per plant can be achieved with this medium difficulty strain in all three climate zones.
A Recommended Sativa To Grow Outdoors
Gold Rush Outdoor is our top seller and is a cross of Purple Power x Polm Gold x Afghan. Similar to the Polm Gold, this variety is a rock hard producer that is ready to harvest between the start and the middle of September. This is one of the earliest flowering varieties we have made thanks to the notoriously early flowering Purple Power, expect the best traits from Polm Gold and Purple Power to come through. Gold Rush Outdoor grows to a height of 2m and has an earthy diesel aroma, it can be harvested early to mid September. Very high resistance to cold, mould and damp environments. Outdoor yields from this medium difficulty Sativa are 350-450g per plant with great results in zone: A/B/C. For more information read our growing marijuana guide.