OG Kush. I've noticed some patches on lover leaves. Any ideas where I should be looking? If suspected phosphorus after looking at a deficiency chart. Only on a couple of fan leaves. Flowering seems fine.
Feeding Bio Bizz Grow / Bloom / top max at 2ml / 2ml / 1ml.
Your plants need potassium and phosphorus. A little calcium would like do them good as well. Light nitrogen, plant does not use nitrogen in flowering like it does in vegging.