Ridges in leaves

could be climate realted - high temps or low rh. Or, is a fan pointed directly in this area? Older leaves, especiially if shielded, do age, but they are still useful. If isolated or only on older leaves, i wouldn't overreact. just keep an eye on it.

Looks like early signs of nitrogen toxicity — the leaves are dark green, a bit shiny, and clawing slightly with ridged edges. At week 2 of flower, your plant should be transitioning away from high nitrogen. I’d recommend dialing back the veg nutrients and switching to a proper bloom formula with more phosphorus and potassium. Consider a light flush if you’ve been feeding heavily, and keep your pH in check (6.0–6.5 for soil). New growth should bounce back nicely if corrected early.