LOL WH I'm beginning to understand about that. Giving the old dirty stuff a go myself for this batch of mothers. Had some beautiful looking SIlver Haze & Crimea blue seedlings right up to they got five nodes & I thought I could add a bit of nutes. WRONG

They haven't grown at all since just before christmas so re potted them today into new potting mix & removed the badly affected leaves, fingers crossed they will come back especially on the CB as Barneys seeds proved to be pretty bad on the germ ratio's.