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« on: February 17, 2015, 08:55:01 PM »
I'm sure it's mostly about variety, but in general, non astringents do better in warmer areas than astringents. If you wanted to know if an astringent persimmon is American or Asian, it's easy to tell. First of all, they each have their own distinctive flavors, so If you matched it up against a Hachiya, then it would be clear. Second of all, American persimmons can take much more cold than Asian persimmons. I would say that if you were growing Asian persimmon in zone 6 then it would be surprising, although there is the island heating effect (if you live in the city) to take into account and the popularity of Asian persimmons over American ones. Third of all, American persimmon fruit is much smaller than Asian persimmon. But if you haven't tried the fruit before, you could ask whether the tree suckers a lot (Americans sucker profusely). As for chill hours, if you have at least 100 chill hours, then you'll be fine. Most places say <100 chill hours, others say 200 just to be sure, so it's hard to say when it comes to like 50 chill hours or so. If you try, please put it in a cold micro climate and pour ice on the roots if like. It may also need frost protection if it never goes into dormancy, but you could try experimenting. To help your chances, try grafting more cold tender varieties (such as Hachiya or Giombo, for astringents).