Mine's only in 2nd season, but I can't say I've noticed anything like this or anything out of ordinary on my Rosseyenka,

Creek,

I got my Rossyanka from Cliff at England Orchard four year ago, so far I did not have any problem with leaves dropping off. I will keep an eye on it. Let me know if you want to try my scionwood at your place next year to test it out.

Tony

This is not a disease but a feature of this variety. Rosseyanka is the only true hybrid with 50:50 ratio of each species. Since the american and asian persimmon are not very cross compatible this first direct hybrid although vigorous shows some genetic instability. It may be simplified but I am not going into meiosis thing as I am not an expert in plant genetics.

Harbin, do you grow this variety and have you seen this phenomenon that I've described? If so, do the trees that you've seen with distorted leaves eventually become productive? I had condidered an explanation along the lines of what you say, but I'm puzzled as to why others are not reporting this far from subtle observation.

2nd year in ground for me and i have noticed the young weak wavy leaves on both my trees. they seem to advance past it last year and seem to be this year as well. Both my trees from Just Fruits & Exotics

Creekweb, yes I am growing Rosseyanka and made the same observation as you and others did. The trees will grow out of it as the season progresses and set flowers and fruits on the section with ordinary leaves.

Hmm. Have had it growing here since about 1998 - and had not noticed an issue - but after seeing this, as I passed by it today while mowing the orchard, I noticed that yes, most of the leaves are somewhat curled/crinkled/deformed. Looks OK otherwise.