Quote Originally Posted by jon420
The ONLY time I will do any trimming is under the conditions I showed above...I have done the same thing to a couple of other plants (3 of the same strain) before but the none of the leaves were yellowing. I wanted to see if there were any difference. I found growth development to slow down when trimming pefectly health green leaves during flowering. I also noticed flower development to be less dense. Now, the only trimming I do is during flower when the leaves are yellow and I only do it once or twice at most. I also do not do any trimming or prunning during veg but I do like to play around with fimming and topping.:thumbsup:

+1!!

Cutting a green leaf hurts the plant as green leaves are still generating food and energy for the plant.

I leave all the fans on until they get really yellow, and for the most part they fall off if I give them the slightest downward pressure near the stalk.

Once the plant has started to yellow a leaf it's not costing energy, just circulation. There's lots of nutes tied up in the leaf, so the plant is pulling the nutes out of the leaf before discarding it. I read a post just after I joined discussing pruning all the big fans when you start flushing for this exact reason.