Purple petioles and cupping down

genetics, led? or lacking P. ml/gal and the like doesn't really tell you the dose of anything, so can't do much with that info unless someone uses exact products. red in the stem is something different, possibly. that could be a S-deficiency. or, again, genetics. i get red petioles and cannot stop it. this isn't unusual. Pretty sure it's correlated to high-powered LED. so, whatever you do, if you see other symptoms, dial back to previous formula and give it time to recover before trying something else. why is it droopy? again, you have to eliminate possibilities. one, use more perlite than 20%. if they droop after an irrigation this will solve that. Could be too much light per day, if it happens at end of day (end of light cycle), specifically. overfeeding can make leaves claw a bit, but your leaves don't look too lush. proper irrigation habits -- water entire pot -- not some volume you choose that is nicely rounded -- wait until top 1" dries and repeat. if not doing that, start doing that. how often you add fertilizer depends on how much you add each time. can do more frequently with lower dose or less frequently with a higher dose if not irrigating properly, fix that first, then re-assess in a week as long as symptoms don't progress quickly.