I just talked to Edible Landscape that has sold Asian persimmons a long time. Number two staff person there said owner Michael usually suspects potassium deficiency as cause of healthy Asian persimmons not bearing much fruit and recommends applying Tree Tone fertilizer fall and spring. Thought I’d pass this along. Another wrinkle in the puzzle.
Giboshi (Smith’s Best)- takes a Long, long time to bear fruit per Just Fruit and Exotics so they suggest do not prune to limit height which could further delay fruiting.