ScrOG — Screen of Green Method
The ScrOG method uses a horizontal screen to create an even canopy of bud sites just below your light. Executed well, it is the most efficient way to use indoor grow space and maximise yield per watt.
How ScrOG Works
A screen or net is stretched horizontally 30–40cm above your pots. As branches grow through the screen, you weave them back under and along the screen, training them horizontally. By the time you flip to flower, you have a flat, even canopy covering the entire screen. Every bud site is the same distance from your light — maximum light efficiency.
Building Your Screen
Use bamboo sticks or PVC pipe for the frame. For netting, 5x5cm or 10x10cm square mesh garden netting works well. Coat hanger wire bent into a grid works too. The screen should be adjustable in height if possible. Place it at a height where branches will reach through naturally without excessive bending.
The Vegetative ScrOG Process
In veg, weave all branches that grow through the screen back under and out along the screen. This creates a flat canopy rather than vertical growth. Fill 60–70% of the screen before flipping to flower. At flip, the plants will stretch and fill the remaining screen. Do not flip too early — an under-filled screen wastes potential.
ScrOG During Flower
Once you flip to 12/12, the plant stretches rapidly. Continue weaving new growth under the screen for the first 2–3 weeks of flower. After week 3, let vertical growth proceed — this is when your bud sites develop. Remove all growth below the screen (lollipopping) to direct all energy to the canopy.
Quick Tips
- ScrOG works best with 1–2 plants trained to fill a screen rather than many small plants.
- Combine with topping or manifolding to create more branches before the screen is placed.
- Leave 10–15cm between the screen and the top of your canopy for air circulation.