Please help, halfway through flower, spots on leaves, burnt tips, yellowing leaves

Im now a little over four weeks into flower, and im going Royal Dutch Genetics Special K (Northern light x OG kush).

For a little over a week now, the leaves have been turning yellow (supposedly normal, but still kinda early), but brownish red spots have been starting to appear on various fan leaves. The spots are only on some of the leaves, more towards the middle and top of the plant. The buds look fine though, no spots too close to them, but they are hardly getting bigger since it happened.

Ive been using GH's Florabloom, and i just realised after this happened that it was a three part system and i was supposed to be adding the Floragrow and Floramicro (for grow and going into flower)... so im sure this has something to do with it. I know, im an idiot but im also very new to these nutrient systems.

A few days ago i bought them and gave it the right feeding of it all, but the spots are only spreading, now with red veins on the spotted leaves. Also, all the affected leaves have what looks like burnt tips that are reddish brown. I cant afford for this to take all of my fan leaves at this crucial time. Im wondering could it be a def. and that something is locked out? Calcium or Mg?

I dont have a camera at the moment to take pictures, but ill do my best to help you diagnose it.

Please anybody who could help id greatly appreciate it, this is only my second grow and im new to most of this.

No leaf yellowing is "normal." Some growers hold back on the Nitrogen during flowering, but then the yellowing is intentional and the plants would be healthier if they were fed enough to stay green. Your plants at least were N deficient because the Flora Bloom has no Nitrogen. They aren't going to heal the existing damage, so you may have already fixed the problem with the latest feeding.

While they definately need N, what you described sounds like there's another problem as well. The spots, for example, aren't a typical symptom of N def. Try checking the soil pH if you haven't yet.

Mother's Finest said:

No leaf yellowing is "normal." Some growers hold back on the Nitrogen during flowering, but then the yellowing is intentional and the plants would be healthier if they were fed enough to stay green. Your plants at least were N deficient because the Flora Bloom has no Nitrogen. They aren't going to heal the existing damage, so you may have already fixed the problem with the latest feeding.

While they definately need N, what you described sounds like there's another problem as well. The spots, for example, aren't a typical symptom of N def. Try checking the soil pH if you haven't yet.

Click to expand...

thanks for the reply, and yes im pretty sure i somewhat fixed the nitrogen problem because the rest of the leaves are staying green except for a few minor fan leaves that are only just starting to yellow.

Ive been testing the PH and it stays at 7, both the soil and what i feed it. Im pretty sure its because my three pronged 4 in 1 PH tester is just a piece of fucking junk and its really getting on my nerves. I put a fan on it closer because i was wondering if it could have been the heat and himidity. The thing is its not like those other pictures of peoples problems where the spots are all over every leaf, its just a few spots on multiple leafs that slowly spread across the leaf. Also theres the occasional red dot that will appear as well.