Vera Lynn: Noob Gelato Indoor Auto

Feb 28 feeding....wasnt planning on doing another feeding so soon but Lynn has suddenly developed some yellowing on her leaves...definitely some kinda deficiency as I've been feeding once a week at most and usually with less than recommended concentrations....hopefully it gets corrected, so far Lynn has by far the most enticing buds, sparkling with crystals and a wonderfully sweet bouquet. Mar 2 - I'm beginning to wonder about sulphur def. so I added some Epsom salts to ph=6.3 water today and checked the runoff from Lynn, 5.9 which is a little acidic but I think still within acceptable range. I'll ph balance my water a little higher from now on to try and raise it in the soil. N and K should be covered with the nutes, taller plants arent being stressed by the lights and I cant do much about the low humidity at this point so I think I've done all I can to try and correct this issue, now I gotta wait, my least favourite part of this wonderful new hobby :-/ Mar 4 - after further reading, I realize acidic soil would explain the deficiency (s) even tho they're getting plenty nutes. Watered with 1 tbsp sodium bicarb in a gallon of water. Even before doing this the discoloration seems to have stopped so hopefully we're all good. Vera's getting some nice red/orange hairs and they both smell so good I've already started another Gelato bean for the next round.