They're being grown in jiffy-mix (peat moss & perlite) under 35w spiral Fluorescents 2200 lumens each with a fan 18/6. I just tested the ph and it's 6.8 so you're probably right about the ph being too high and not allowing it to get nutes. I just started using Terracycle 3-2-2 plant food and superthrive on the last watering (bottom leaves were already yellowing but the leaves weren't drooping as bad). What is the desired PH level and how do I lower it?

Thanks.