Woke up this morning to a problem that, literally, seems to have popped up overnight. Here are details: Single indica (hash bomb feminized seed) in a basic waterfarm, closet set-up Two 125w warm spectrum cfls with reflectors Temps are 73-78 daytime & 65-70 night, not sure about humidity but "feels" fairly low 17 days into 12/12 Using GH nutes following "Bloom" schedule & kool bloom additive PH flucts between 5.5-7 About 3 weeks ago, I noticed some fungus gnats but felt that I had been battling them pretty successfully as I noticed no real change in my plant. This morning, on the newer growth of the lower part of the plant, appeared some rust-colored, watery looking spots that looked like someone had eye-dropped paint on the middle (not the edges) of the leaves. I apologize for the attached pics as my camera is old and sucks. I'm hoping that someone can help me just from the description and tell me what this might be. Thanks.
Maybe 7-8 which I nipped off. So far, all of the affected leaves were new growth near the bottom of the plant. Just went home for lunch and didn't notice any spread but since this popped up overnight I'm a little worried about tonight.
ummm i would say try and remove enough of the infection, keep your eye on it for a bit longer ill have a flick through my book for you see hwta help i can get you mate
dont cut em off. it will just go to new leafs if you dont fix the problem.try making your pics a little biger, cuz i cant see sh*t. from here it looks like cal/mag def. fix your ph and get some dolomite lime.
Thanks. I'm starting to think you're right about the mg deficiency and I'm also having a hard time controlling ph from day to day. Should I empty my rez and run only water for a day or two and then resume nutes?
well you def. need to fix your ph.are you growing hydro or soiless?never cut off a leaf unless its not geting light or its damaged more than 50%.especialy without fixing the problem, otherwise it will go to new growth and you dont want that.plus remember. cal/mag problem continues even after its fixed so dont freak out.