FFS...were talking about cleaning away the growth under the screen.
hey thats not fair nibs
i consider my scrogs to be pretty decent and i leave all lower leaves. i think of my scrogs like a satellite dish.
i like to remove all the upper fans and leave anything below. this way you have all the buds above the screen acting like antenna catching light without all the fans shading them then below the screen is the satellite dish which catches any light that made it through past all the antenna (buds). also these big fans are the lungs of the plant and the back up generators.
also by leaving the lower fans and removing all the top ones your activating lower bud sites more as the plant is getting a light response down low on the branch and moves nutrients in a way which more evenly develops the buds from the base of the branch to the top, perhaps giving smaller crowns but more evenly sized buds over all.
another reason people say to remove the lower fans is for airflow, thats a load of rubbish too IMO i would rather have it thinned out on top so i can get appropriate airflow moving around my buds than around my trunk and branches.
I do remove all lower shoots. i dont want popcorn buds trying to grow and taking away from the uppers but there is nothing wrong with leaving lower leaves IMO.
and yes any leaves that are getting no light and not earning there keep will go yellow and drop off that is normal natural and healthy. that is the plant relocating those nutrients to some place they are needed more. also by having large fans when it comes to flush time you can flush for that little bit longer and get a cleaner product while the plant feeds itself from the stores in its leaves.
i understand why people trim there scrogs the other way and i used to do it myself. really there isnt much of a difference either way in the end its going to come down to your views and what you feel comfortable with.
Well, you do it how ya want Forget, I'm just trying to tell a Newb, the PROPER way to do a scrog
by trimming the undergrowth, which is what he asked about. After he has got it done the RIGHT way he can play around with ya theories.
You say it's rubbish cleaning under the screen mate , but makes more sense to you to do ABOVE the screen, thats just retarded.
The top where you DO get light shouold be left alone, leaves gather energy from light to produce buds........buds don't collect nearly as much.......
. And you do not increase lower bud size by trimming upper fan leaves....... it doesnt shift energy in the plant.... they just get more light. Think of the fan leaves as big water pumps and solar panels..... take them off while the plant is growing, you reduce it's efficiency.
Saying that though, I am all for defolation late in flower if thats ya thing, but you don't defoliate healthy growing plants.
Those leaves you leave under your screen are just draining excess power from ya plants as they try to keep em alive when they are getting minimal light and are basically useless, trim it all off.......taking off just the shoots is half a job.
Sometimes I wonder where you scientists get ya misguided theories on how plants grow...... basic 101 horticulture classes for you all and less farkin Pootube and online crap.