Curling leaves up high and nute burn

Hey there, have a plant (Black Betty) that is roughly 4 weeks into flowering, Black Gold soil, and light nutrients were used. Some of the leaves are curling downward higher up on the plant, and it appears that some sort of burn/deficiency occurred causing the middle layer of foliage to have orange tips. Also the leaves are not super green (nitrogen def?). I am admittedly not a chemist, anyone have any ideas?

You can expect some yellowing of the fan leaves as the buds get bigger.

Your leaves appear to be showing early signs of Phosphorus deficiency, at least. Here's an example of what P def would look like if it progressed further:


There may be other deficiencies but P seems to be the most prominent. I'd give them an all-around fertilizer with extra P.

Gave em an all arounder, they seemed to bounce back fine. The plants were nowhere near the point in flowering when I'd expect the leaves to yellow so props on the Phosphorous deficiency, seemed to be spot on. The buds are, well, way way bigger and developing nicely.