# SCROG

> SCROG (screen of green) trains a few plants under a horizontal net, tucking shoots so the canopy forms a flat, evenly lit layer of many tops.

- Canonical: https://genetixbay.com/knowledge/glossary/scrog.html
- Also written: screen of green, scrog net, scrogging, screen-of-green
- Glossary category: Cultivation and training · Evidence: Grower practice
- Status: Draft: awaiting expert review · Updated: 2026-10-31
- Licence: CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/), attribute "GenetixBay cannabis glossary"

SCROG, or screen of green, is a training method in which a horizontal net or screen is set above the pots, usually 20-30 cm (8-12 in) above the medium, and shoots are tucked under it as they grow through. The canopy spreads sideways to fill the screen, giving a flat, even layer of [tops](https://genetixbay.com/knowledge/glossary/top-shelf.md) close to the same light intensity.

## In practice

A SCROG uses few plants, often one to four per square metre, and longer veg: the grower flips to flower when the screen is about 60-80% full, since the [stretch](https://genetixbay.com/knowledge/glossary/stretch.md) fills the rest. Tuck daily during late veg and the first two to three weeks of flower, then let tops grow up through the screen. Remove or tuck weak growth beneath the screen, which gets little light.

SCROG pairs well with topping or mainlining and suits plant-count-limited home growers.

## Don't confuse with

- **SOG**: many small plants, little or no veg, one [main cola](https://genetixbay.com/knowledge/glossary/cola.md) each.
- **Trellis netting**: the same net can be used for support only, without SCROG tucking.

## Related terms

[SOG](https://genetixbay.com/knowledge/glossary/sog.md), [LST](https://genetixbay.com/knowledge/glossary/lst.md), [Tucking](https://genetixbay.com/knowledge/glossary/tucking.md), [Trellis](https://genetixbay.com/knowledge/glossary/trellis.md), [Even canopy](https://genetixbay.com/knowledge/glossary/even-canopy.md)

## Read more

- [SCROG: screen of green](https://genetixbay.com/knowledge/training/scrog.md)

## Sources

1. Danziger N, Bernstein N, 2022. Too dense or not too dense: higher planting density reduces cannabinoid uniformity but increases yield/area in drug-type medical cannabis. Frontiers in Plant Science 13:713481. https://doi.org/10.3389/fpls.2022.713481