looks like my 'calcium-deficiency' diagnosis was probably correct ... I was using FF 'Grow Big', while waiting for my store to get their FF 'Grow Big Hydro' in stock ... I had wondered what the differences between FF 'GB' and 'GB Hydro' were, besides nutrient strengths ... comparing the two, guess what ? . .. the FF soil version of Grow Big does NOT have calcium in the formula, the Hydro version does ... cool, that explains it ... regardless, only the 'Sour Jack's showed a little bit of 'spotting', probably indicating the 'Killa Queen' and 'NorCal Daddy's Girl' aren't as calcium-dependent, or perhaps, more acid-loving ... ??? ... dunno, and may never know (or care ) ... here's the little ones on Day 17, from germination, still alive, despite my neglect ... I usually find my plants do better, when I leave them the hell alone ... :jointsmile: