Most asian persimmon varieties produce only female flowers. Coffeecake is the only one of your four that I have heard sometimes produces male flowers as well - which is good, because Coffeecake needs pollination or the fruit will taste horrible (it is a PVNA type). Probably the easiest way to avoid seeds is to throw away the coffeecake tree. Covering to prevent pollination can be done with plastic on a few branches but its hard to cover a whole tree during the whole pollination period. You could also try to recognize male vs female buds and cut off any male ones before they bloom (the male ones have a slightly different shape).

Scott

Hmm I neglected to answer your whole question -- I forgot to mention that most persimmon varieties don't need any pollination to produce good fruit. Coffeecake is the only one of your four that needs pollination and it is also the only one producing male flowers.

Another idea is to plant the Coffeecake hundreds of feet away from the rest so it will not pollinate them. I believe Coffeecake will pollinate itself; I have a Chocolate which is similar to Coffeecake and it produces both male and female flowers and seems to be pollinating itself.

Scott

Since I have only one tree that produces male flowers can I expect only a small percentage of fruit to have seeds?

Is it possible that one or more of the tree(s) will flower too early or too late to be pollinated by the male flowers?

I have only one tree, Chocolate, with male flowers, and all my persimmons are completely seeded. You may get different results than I do, but I would not be optimistic based on my experience.

Scott