315cmh 20" above plant, 1/4 strength AN Micro Grow Bloom, 6.25ph in, 5.8ph out. Watering every 24-36 hours or almost completely dry. 18/6 light schedule.
My plants are drooping and some leaf undersides are turning purple. What am I doing wrong??
I agree, too much water. Your stems are getting a little lanky as well, you should repot them to bigger pots and plant them in so your stems are mostly covered in the pot soil. Leave only an inch or 2 above the soil. Your stem will start to grow roots and your plants will be short again.
You are using too big pots! Therefore overwatering is garanteed! If your roots are dying purple is the sign your plants using up more Mg as the roots can supply it. I can't explain it like this guy so head over to the grow boss-> www.youtube.com/channel/UCIr3U1IcBrdO073_e-JJr6A
And I would cut off those peat moss cups you have them in before replanting them. I know you are supposed to be able to plant them directly in the new pot but in my experience early on in my growing I had very poor luck with those. I stopped using them all together after the second time. Every one of my plants I left them on died. Just a heads up... lol