When Can I Eat the Japanese Plum Fruit From Our Tree?

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Japanese plums are delicious when eaten at their peak ripeness.
Japanese plums are delicious when eaten at their peak ripeness. (Image: plum image by Henryk Olszewski from Fotolia.com)

The most commonly eaten type of Japanese plum, the sumomo, ripens between February and June, depending on the climate and region. Typically, it is ripe for eating about 90 days after the flowers bloom.

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Types of Japanese Plum

Generally speaking, there are two types of Japanese plum that can be eaten: the sumomo and the ume. The milder tasting sumomo is the plum most typically sold in supermarkets in America. The ume can be eaten, though only after processing to make them more palatable.

Identification

Sumomo is larger and more oval-shaped than the ume, and turns from green to purple as it ripens. Ume is round with a groove running from the stalk to the tip, and turns from green to yellow as it ripens.

Peak Time for Sumomo

Sumomo will ripen anywhere between February and June, depending on the climate and region. Generally, the fruit is ripe for eating 90 days after the flowers blossom. But the best way to know when the fruit is ready for eating is to check the color: they will lose their green tinge and look ripe and be firm to the touch, but not rock-hard.

Peak Time for Ume

Ume ripens in late June or early July. The skin turns yellow, sometimes with a red blush, as it ripens, and the flesh becomes yellow.

Preparing Sumomo

For best results, pick the plums slightly early and allow them to ripen in a cool, dry place.

Preparing Ume

Typically, ume is not eaten, but is instead used in the production of a sweet liquor called umeshu or for umeboshi, a sour, pickled plum. The reason for this is not just the hardness of the raw fruit, but also the fact that the seeds of early-harvest, green fruit can break down to prussic acid, and if the seed fractures inside the fruit, the raw fruit becomes dangerously poisonous.

References

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