This will be my third season taking care of this persimmon tree. The tree itself has always had lichen on its branches, but has tended to produce about 40-50 Fuyu persimmons every year.
This year, however, the tree seems to be dropping a LOT of buds and small fruits. This has not happened before. Could it be a result of some of the Espoma Citrus fertilizer that is in the soil? I have been giving it a good watering once a week. Pictures below. Thanks!
To me those leaves look scorched from intense sun, not fatal. Second photo—south or southwest side? Had hot weather? Can't rule out some nutrient deficiencies, but my experience with Fuyu persimmons just north of you in Sonoma County was that they produced abundantly with minimal care, moderate water. Sometimes fruit trees will self-cull when they've produced more fruit than they can maintain under prevailing conditions. Assuming you didn't OD the fertilizer and the watering is adequately deep and not too frequent, I'd just wait and see. Or contact your local UC extension service.
I think I remember you from a couple of years ago. Didn't you have a magnificent Meyer lemon?