When a length of poultry netting is stretched over the grow area, it eliminates the need for conventional training methods. Tying, bending, and crimping are replaced by using the netting as anchors to keep shoots in position. The netting can also be perfectly shaped to make best use of the light. The netting is known as the screen, hence the name Screen Of Green or SCROG for short.
Plants are topped to promote branching, as the plants grow into the screen and their shoot tips start to grow through the holes in the screen, they are pulled back under the screen and guided to the next hole in the screen to continue their horizontal growth, all the time maintaining the profile of the screen to maximize light use. Growth is extremely robust. While now getting the same light intensity as the primary shoot tips, secondary growth seems to blossom, and from the secondary growth comes tertiary growth, etc., all at the top of the canopy, and all receiving maximum light intensity. How many plants are used depends on how much time the grower wants to take to fill the screen to a point where it will be full with buds at harvest. This will largely depend on the growth traits of the variety he uses, but one can fill a canopy with only one plant if desired. When flowered, only the slow growing buds typical of the post stretch phase are allowed to grow through the holes in the SCROG. The resulting harvest profile is indeed a Sea Of Green but with much fewer plants and the increased yields gained from making use of the void spaces found in a conventionally trained non-SOG canopy.
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