This is a question I'd only know about due to a horrible miscalculation in my grow room last winter. The plants were about a foot high and the stoner I am...I accidentally plugged the heating unit into the "un-timed" plug. So the heat kept cranking during my night cycle...which is day on the outside of the room and blah blah blah I fucking fried my plants. They were pretty much dead from a half a foot and up. Dry, withered and smokable...tho you'd get fuck all. Anyway, I decided to experiment. I cut the tops off. Long story short they continued to grow but only to about a foot again...yet this time they had 4 tops and yielded a good deal for a small plant that was fucked up with from the start. The smoke was top notch as well.
Novie
CANADA