My guess is iron manganese deficient. Only an opinion. Recurring issue with some of my heavy micro nutrient needing plants. LOL. I suggest well water if in the upper mid west. LOL.
I have fed it nothing. Started life in miracle grow vegetable mix. They seem to take forever to suck up water. Temperature is around 70 degrees F, and humidity hangs around 40-50%. Im growing them under 320w kingbrights