Black gritty stuff on leaves & one other problem
Mellow Yellow has some black gritty stuff on the leaves, looks like charcoal dust. It's not blackspot. The bush is by a busy street, but the other bushes don't have it.
Next situation, the mini Gourmet Popcorn has some leaves which are pale green with darker green veins. Not sure how to deal with that. I have fed it last in May, organic.