1st, I agree that knowmy knows his shit and has the Best Karma on the board...lol, and you are right
bob bobb; Knowmy said, "Nothing about pruning".

Pruning should only be done, when absolutely necessary*
In case of injury, disease, burns, etc...

If you cut off alot of Fan leaves you are disabling the plants ability to breath...which is just as important as nutrients water and light. LIP is 'right on' this time...KUDOS...LIP!

There is no increase in yield when you top** and/or prune a plant. In fact if you prune during flower photoperiod, you actually shock the plant, and instead of growing bud, It is spending important energy tending to the injuries instead of the buds...just to make it simple.

**topping basically allows you to control the height, and topped plants have a tendency spread out...thus creating the illusion of more yield. If you top; Yes you will create more budsites!!! But; they will be alot of smaller buds, than the plant that finishes 'un-toppped' and creates this Giant Mongo kola all the way up the stem.

However, when I repot into my biggest pot or transfer hydro vegging plants to the 'BIG' system...

*kickass tidbit of info:
I take off about 4-6inches of all the little crap, around the bottom of the stem. This is Good, because it allows air to circulate much better around the plant.

well I hope this sheds some light on the subject for you all, and this is one topic, that is actually pretty much factual, not just a matter of opinion. afterall. lw