Yeah i most definatly have try that on the next batch.. man these plants are all the way at the top of the grow chamber its way past the sodium lamp.. and some plants that are touching the lamp are dying.. maybe because its too close too the light or the heat from the lamp is killing them ..basically 5 mths waisted, most of the small ones are dead because the big ones blocked the light...

So if I start topping , this needs to be done around when the plant is 1/2 inches?

I'll post updated pics to show the bad results.