yes, they are in soil, I don't know what is the ph, but every time I use quality soil -substral terra magma and water them with tap water...I fed them 2 days ago, I'll water them when pots will get light, and then feed once more...they are flowering, of course, because they are 50+ days old and they are autoflower plants...I had similar symptoms before, then I transfered plants in other pots with new soil, and they changed to better...maybe next time I'll keep them in smaller pots 40 days, and then transfer them to larger pots...so, you are sure this is not cal/mag lockout?