Hi guys, I've done a lot of reading and searching, without much luck on this. Any ideas of what could cause this speckling? It only seems to affect certain mature fan leaves... Thanks!
Your pictures look like the twelth picture down The Complete Guide to Sick Plants, pH and Pest troubles! - International Cannagraphic Magazine Forums
It does look a little like calcium too. Sounds like Mg can lock out Ca and vice versa. Anyone know how to distinguish?
Buddha Bloom for the last couple weeks. But I noticed it slightly even before flowering. It seems to be getting worse now.
I just watered with a gallon of bottled "drinking water", collected the runoff, and tested it with a pH tester that is meant for collecting a small soil sample, and filling with water. This one: It shows the pH to be 5.5, but I'm not sure if the reading is valid when using it this way.
I think it's time to back the nitrogen down a bit too. Maybe some dolomite lime to raise the pH, add Mg and Ca?
Did a mini-flush, then watered in 5 tbs of dolomite lime into each 3 gal container. Run-off already jumped from 5.5 to 6.5, and since I haven't used lime before, it should continue to bump up the pH. I'm hoping that between the higher pH and a little additional Mg and Ca, they will be pretty happy.
hey man check out Nutrient Knowledge Article's Merged the pic in this article has the same spotty pattern
Thanks for the link! I don't think it's heat burn for a couple reasons. First, the whole enclosure is ducted and fan fed. Also, I first noticed it on older fan leaves, well away from the lights.
Arg, the spotting has gotten a fair bit worse. I'm really hoping that the dolomite lime is going to get things in line, but maybe it will take a week+ to see the effects.