hi m8ty usally yellowing from the top could be due to sulfur deficiencie sometimes confused with N deficiencie i think epsom salts is good for this
wait for RUSTY because he seems to no his stuff could also be over nuiting/fertz
jaydee84 Reviewed by jaydee84 on . yellowing leaves hi, i've got 5 plants that are in there second week of flowering, all are doing fine but one, about 3 weeks ago the leaves at the top started to lighten and yellow, its now yellow about a third of the way down and the buds are tiny,:( i repotted about 4 days ago and it did look a bit rootbound, i have noticed a couple of little black flies in the room as well! anybody help!! Rating: 5