Ailment ID if possible
IÂm not sure when this ugliness first appeared, but I think about 1 Â½ years ago. ItÂs only on the old PBÂs and none of the new growth since seems affected. I think the black blotches have gradually gotten larger, but rather slowly. The PBÂs are dry, still firm Â no mushiness or anything like that. Black death? Sunburn? Any clues? IÂm actually kind of embarrassed by this since I usually take pretty good care of my plants.