Does anyone have any idea what this is?
I have a mix of autoflower strains (white widow, ak47 and bubble gum). Outdoor grow. Some new growth (bud sites?) shows black in the leaves. None of the plants have this at all bud sites. One has this in 50% of them, most have 20% and a few have none. It does not rub off, it appears to be pigment in the leaves.
Is this normal?