I think it's also that the plants require little or no attention at this point. I may have let stuff go because the plants are still thriving compared to stuff I've grown in the past.
Actually saw it first on the BW, lower leaves getting splotchy about a week ago. So I upped the cal-mag (on all) and when I started doing the fan leaf pruning the BW has new leaves popping everywhere. I had to sort through them to find the old fan-stems.
So I have been treating them all roughly the same, based on what I have seen in one of them - since they have been treated the same. Which is also part if the problem. Hoping to nip problems in the bud (pun intended) on one plant by catching it early in another. With different strains it's probably a bad move