Just as a side note. I’m in a 10b region and have noticed that two Suruga persimmon trees that I planted have struggled. They were planted two and a half years back with three other varieties, Nightingale, Daidai maru and Jiro. The latter three are thriving but I noted the two Suruga just seem to manage to leaf out then sit and look sad with two or three leaves per shoot. I’ve recently moved to this region from a more Mediterranean climate so I am not expert but it was something I noticed with the Suruga over the last few months.