Check this thread out...

1st post, 5th photo "Potassium"

http://boards.cannabis.com/basic-gro...-pictures.html
ZZTops Reviewed by ZZTops on . Too Much yellowing happening just to be normal. ok I'm giving my ladies 1 tbs of molasses with their regular chems. but with this rapid yellowing creeping up 1 of my tree it can't be natural. I mean its rapidly climbing fast! Yesterday saw the problem today I need a solution. All my other plants seem to not have this problem just 1, so what could it be? The yellowing was just at the bottom of the tree, now it 3/4s of the way up the tree. Rating: 5