Prunus domestica and related species
Plums are stone fruits with juicy flesh, a taut skin, and enough acid to keep sweetness from turning flat. In the Northeast they are still less common than apples or pears, but cold-hardy hybrid plums and some European types can do well enough that Maine growers have treated them as a serious local-market crop rather than just a backyard novelty.12
The category is broader than it first appears. Food books tend to group together European plums, damsons, bullaces, gages, and related fruits, while orchard guides in Maine usually divide the practical growing conversation into Japanese plums, European plums, and hardy hybrids selected for colder winters.23 Japanese plums generally ripen earlier and read juicier and more overtly fruity; European plums usually come later with firmer flesh and a sweeter, denser profile.1
That balance of sugar and acid explains why plums move so easily between fresh eating and preservation. They typically carry about 10 percent sugar and around 1 percent malic acid, which is enough structure for jam, dehydration, and fermented or salt-cured preserves without tasting one-note.2 The broader plum family also includes the species used for traditional preserved plums in East Asia, which is why an experiment like Cherry Umeboshi makes sense as an adaptation even though ume is not the same fruit as an ordinary market plum.2
Footnotes
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University of Maine Cooperative Extension, “Plum Production in Maine,” accessed July 29, 2026. ↩ ↩2
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John Vaughan and Catherine Geissler, The New Oxford Book of Food Plants, 2nd ed. (Oxford University Press, 2009), p. 76 (PDF p. 111). ↩ ↩2 ↩3 ↩4
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University of Maine Cooperative Extension, “Types of Fruit Trees,” accessed July 29, 2026. ↩