I’ve read an article summarizing six PCNA persimmon varieties released by the Japanese breeding program from 1959-2002. The names are Soshu, Izu, Shinshu, Kanshu, Suruga, and Youyou.
– Soshu is the earliest ripening (late Sept / early Oct in Japan).
– Izu, Shinshu, and Kanshu may be OK (late Oct in Japan).
– Suruga and Youyou are too late for here (early/mid Nov in Japan).
– Izu appears to produce the best fruit. I’ve seen it mentioned in posts on this forum. Reports I’ve seen say it ay be hardy only to ~ +5 F.
– All the varieties produce fruit that is described as fast-softening after picking and “very sensitive to chilling injury” during storage.
Another paper discussing seven releases since 1990 repeats Soshu, Shinshu, and Kanshu but adds Yoho, Taishu, Yubeni, and Kishu. So that makes 10 in all.
– Yoho, Taishu, and Yubeni ripen too late (November in Japan).
– Kishu ripens (with Shinshu & Kanshu) in late October. But Shinshu and Kanshu reportedly suffer from severe skin staining.
So then Soshu and Kishu seem to have potential as medium to very firm but juicy fruit, with little cracking or skin discoloring.
Does anyone have information to add, especially regarding (1) ripening times, (2) cold hardiness, and (3) fruit quality?