Hello y’all. Grower here for more than 15 years and have exhausted every google search, tried networking and still am unsure how to correct the issue. My girls are in various stages in veg, seedling up to teens. In each of these stages I’m seeing purple reddish stems, leaves are yellowing and getting blotches drying crinkling off. Temps are good, lights are perfect, humidity is good. I’m using Canna Nutes ec and ph are all in check. Anyone have any suggestions if I should add a phosphorus additive? I have flushed and do so on a regular basis as well as check runoff with each feed. Totally lost.
