Two popular methods of low-stress training that increase yield are sea of green (SOG) and screen of green (ScrOG). Each technique is used very successfully to maximise yield per square metre. Autocorrect might hate them, but cannabis plants love SOG and ScrOG.
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LST is particularly advantageous when growing indoors domestically, where there is often not a lot of space. Artificial light has poor penetration and the strength of light reduces with the inverse square of the distance from the canopy. LST methods maximise yield per square metre by making efficient use of the lighting.
SOG and ScrOG are ideal for growers with space restrictions, as minimal height is required and every square centimetre of floor area gets used efficiently. There is no need for as much grow space volume as there would be for an untrained plant to get just as heavy a yield. SOG produces large individual buds with no popcorn or poorly formed flowers due to lack of light.
Strain selection plays its part for efficient use of space.
ScrOG: This entails a mesh screen with large enough apertures through which to feed cannabis leaves and branches. This can be made from commercial fencing wire or a plastic trellis, or made from wire or string and fixed to a frame. The purpose of the screen is to continually tuck under new growth into a flat sheet. What would have been undeveloped lateral branches with barely developed buds become healthy, stout branches with plenty of light exposure and their own dense flowers.
Typically, the SOG technique encourages apical dominance to strengthen and enlarge the main flower cluster. The ScrOG method, however, discourages apical dominance to promote many similarly sized flower clusters.
Using the right pots for your SOG or ScrOG garden is super important to ensure the health of your plants and the best possible yields. As a general rule of thumb, you’ll never want to grow using pots of less than 3–4 litres, but keep reading for a more detailed look at what pots to use for SOG and SCROG.
Screen of green is a plant training method with the same goals as SOG—to increase the yield per square metre at harvest time as much as possible. Larger pots are used to accommodate larger root zones for larger plants. Many flower sights are encouraged by bending and holding new growth horizontally. Even light distribution over a literal screen of green fills an entire grow room with fewer plants that have an abundance of homogeneously sized flowers.
Before we can switch our attention to the flowering or bloom phase, we have to make sure that we have raised large, healthy ladies during as short a growth or 'veg' period as possible
Thanks to GIVE_ME_ATTENTION for making this moving gif of an SoG in action!
Another example of a small SoG setup
These five auto-flowering plants started at the same time in this DWC setup. Without any training or special time schedules, they grew into this at harvest!
Here you can really see the SoG in action after all the plants start making buds. Even though each plant didn’t get very big, there are many, many bud sites! They completely fill the entire space!
Some growers flip to flowering when plants are just a few weeks old and a few inches high. Other growers may wait a bit longer to achieve bigger plants. If in doubt, I recommend waiting an extra week for the best result 🙂
After the switch to 12/12, plants start stretching and getting bigger.
Since each plant doesn’t get very big before the switch, the time to harvest time comes a few weeks earlier. However, since there are so many plants and bud sites, you get the same yield as you would from bigger plants.
Here’s an example of SoG in action during the vegetative stage using those eight seedlings. Notice how quickly the whole space got filled up since there were so many plants. It went from empty to completely filled in about four weeks. By the last picture, all eight plants are already flowering. Each of those plants will be able to support a fat main cola in this setup, and it took less time than if the grower had tried to fill that space with just one plant.
Many growers also “top” their seedlings by removing the tips of seedlings when they have about 4-6 pairs of leaves. Topping can increase the number of buds sites, but if you have enough plants, you will have enough bud sites. It’s often easier to grow fewer plants, so for a grower with time concerns, you can get a lot of the benefits of Sea of Green with fewer plants by simply topping your seedlings and giving them an extra few days or a week in the vegetative stage.
This tutorial shows you how you can use the practice of growing many small plants to increase your yields and get to harvest more quickly!