Diospyros virginiana In respect to the power of making heartwood, the persimmon rarely develops any heartwood until it is nearly one hundred years old. This heartwood is extremely close-grained and almost black, resembling ebony (of which it is a true variety). It is a common misconception persimmon fruit needs frost to ripen and soften, called bletting. Some, such as the early-ripening varieties "pieper" and "NC21"(also known as "supersweet"), easily lose astringency and become completely free of it when slightly soft at the touch—these are then very sweet, even in the British climate. On the other hand, some varieties (like the very large
Diospyros mabacea 15 cm long, 2 to 5 cm wide. Paler below than on top of the leaf. Leaves alternate on the stem as is the case with other "Diospyros" trees. Small flowers occur in September. Red fruit appears between January and March. Similar to a cherry tomato of various shapes. Sometimes round or egg shaped, long and thin, or other times flat like a pumpkin. Up to four and a half cm long. The flesh is whitish, dry, without taste and unpalatable. Fruit usually contains between two and six seeds. Seeds are brown, curved and triangular in cross section. The specific