Topping plants is a cannabis training technique that involves cutting off the top of a main stem. The technique is designed to give you a free way to create more colas as well as spread out the plant so you can take advantage of all your light. As a result, topping can help you achieve bigger marijuana yields!
Most plants naturally only have one main stem. The idea of “topping” is to cut off the top of a main stem to split it into two. If you let a marijuana plant grow naturally, it will usually grow one main stem.
The two growth tips that remain will each develop into their own stem. Each stem can turn into a bud/cola in the flowering stage, so by topping the plant once or a few times, you increase the total number of bud sites under the grow light, and it also helps you keep the plant flat and wide.