got green o matic.how to keep it as small as possible?

All plants only grow the size of the environmental allowance they have to grow in so you don't really have to do anything to make it shorter, however if you just slightly bend the branches down without breaking them on the top of the plant they will grow around the sides instead of on top.

thanks .so i need just to bend a little bit.anything else?

Low Stress Training. make a grow journal im trying to do a pc grow and want my future plant to be as short as possible lol

I would lst them. I have 2 green o matics going right now 42 days old from seed. Both dif pheno types ones about 14" tall with no side branching and one is 21" tall with alot of side branching. They started to flower around 8" tall.

how long and how often i should do LST?

I have found its a lot to do with the plant pot your growing in give it room to shine and your plant will grow massive, give it nothing but a solvent can lid and it will grow to 5 inch's or so get my drift lol ?