This Jack Herer is 2 weeks into flower and is just started showing this "deficiency". It's mainly near the top so am suspecting light burn since lowering the LED light for flowering but the pics don't quite match up with what I see here and elsewhere online.
It also looks a little like a PH issue but run-off has been consistently around 6.5. 1150ppm last feeding, 5 days ago.
Any suggestions? THX!
I'll do flush tonight and stop adding FF Grow Big. Yes; I appear to have a bad aphids problem on all my plants. (First timer blunder) Just started misting w/ACV and water. Capt Jacks arrived today! Thank you!
I see a combination of things. Looks like you may have nitrogen toxicity and some sort of pests like spider mites. That could be causing the plant to show other issues as well like the rusty-looking spots.