First they turn yellow, and then they fall off. its slowly working its way up. thought they could be in need of a bit more water, but I don't see any evidence of that. no drooping, no powdery mildew. so now im thinking its may be a deficiency of nutrients in the surrounding soil...? never had this problem with our Superba before. we usually only fertilize once in early spring with alfalfa meal and a good layer of compost. but something is different this year I fear. thoughts...?
