Please Help

At what point (size-height) of the plant do you move it from the nursery to the main grow room???

 

Well I move mine in at 7-8 inches and they get 2-3 foot tall.
they double or triple in height.(at the very least)

 

It depends on the strain and what size you want your final plant to be. Indica dominate plants tend to stretch much less than Sativa doms. I have a Lemon Chemo (Indica dom)that doesnt stretch at all and I have a Skunk that when flowered at 8" ends up at over 3 feet.