yellowing leaves

[nbonkp]

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!!

[jaydee84]

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]

[QUOTE=nbonkp;2179241 i have noticed a couple of little black flies in the room as well! anybody help!![/QUOTE]

also as for flys could be gnats you can get gnatoff at any hydro store or similar,its specifically for blackfly some are fungus gnats they like to lay eggs in the soil and if your soil is looking a bit fungusy that can root your plant from top down i no you re-potted could of happen from be for
how much are you watering and is it humid in g/room also are you giving nuits/fertz

any pls correct if im wrong

[polishpollack]

That does resemble sulphur deficiency, but I'm not entirely sure about that. Find an all-around fertilizer, one that has boron, sulphur, mg, mn, etc., and give that plant a dose as stated on the container's directions. Giving magnesium won't help with a sulphur def. You've got to give sulphur if that's what's missing. Many hydroponic ferts will have everything a plant needs. Supernatural comes to mind. Ask for this kind of thing at your grow shop.