Never heard of sweating. Just be careful you don't cook the tree. Anything over 100F is unlikely to be healthly or helpful.

Persimmon are slow to leaf out especially after planting. Sometimes not until summer or later.

I received a Smith from JF&E and it's just beginning to leaf out now. I hope this is not the case every year because it will need to go dormant before it even gets going.

Bare root trees always take longer to leaf out the first year.

Seems very late. I ordered some very late trees (bare root) ..some came only a few weeks ago, but even those have started sending out shoots all over.

Sounds dead, but who knows.

Not all bare root take long to leaf out the first year. In my experience, most of my trees leave out in a few weeks.

Not Nikita's Gift persimmon I planted bare root on April 14, this year. It took almost two months to bud out. Now it's late June, there are 3 small shoots with some leaves. Don't think the leaves are fully open, either.

I've heard that persimmon takes much longer time than most other fruit trees. It's true to me.

I planted it, mulched, and water it if no rain for a week, just like other trees.

The Smith I received last fall was not bare root. I up-potted and kept it in my garage with my figs. I hope this years slow start is an anomaly. After thinking it was dead though, seeing little green sprouts made me very happy.

You've got nothing to lose by giving it some more time, but I would be hesitant to "sweat" it. If it doesn't make it you won't be sure if it was the sweating or not that did it in.