Plum

• 1. Introduction

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  Plum sits at the oldest intersection of human hunger and cultivation. Before grain fields spread across the ancient world, before olive groves lined Mediterranean hillsides, people were already gathering and tending wild plums across Eastern Europe, the Caucasus Mountains, and China. Plum remains have been found at Neolithic archaeological sites alongside olives, grapes, and figs, placing this fruit among the very first foods that humans chose to domesticate rather than simply forage.

  Three of the most widely cultivated plum species cannot be found growing in the wild at all. They exist only near human settlements, which tells us something remarkable: people did not merely harvest plums, they transformed them, generation after generation, into something entirely dependent on human care. How did a fruit from the highlands of Eastern Europe and China become a global crop harvested in volumes of more than twelve million tonnes a year? And what happens when a drupe crosses oceans, changes names, and gets pressed into brandy, pickled for rice balls, or marketed so successfully that its quality almost doesn't matter?

• 2. A Fruit Without a Wild Home

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  Prunus domestica, the species that accounts for most plums and prunes sold in Europe, has been traced to the East European and Caucasian mountains, yet it does not grow wild there. The same is true of Prunus salicina and Prunus simonii, both of which originated in China. These three species exist because people kept them alive, selected the best trees, and passed cuttings and seeds across generations.

  The scholar Ken Albala has placed plum origins specifically in Iran. From there the fruit moved westward, reaching Britain from Asia. By the twelfth century, plum cultivation in Andalusia, in southern Spain, was considered organized enough to appear in Ibn al-'Awwam's Book on Agriculture, a major agricultural text of that era.

  Medieval English monasteries kept records of plum cultivation as well. The poet Geoffrey Chaucer mentioned a garden containing 'ploumes' and 'bulaces', anchoring the fruit in English cultural memory well before the horticultural explosion of the seventeenth and eighteenth centuries. It was during those two centuries that greengages received their English name and the Mirabelle plum became firmly established as a distinct variety.

• 3. Thomas Rivers and Victoria

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  The breeder Thomas Rivers made advances in English plum development during the period when variety work was at its most productive. Two of his cultivars, Early Rivers and Czar, are still esteemed today, which says something about the durability of careful selection over commercial novelty.

  The Victoria plum offers a different kind of lesson. First sold in 1844, it became one of the most recognizable plums in Britain, yet observers have attributed its fame to good marketing rather than to any inherent quality of the fruit itself. That a plum could achieve lasting celebrity through promotion rather than flavor is a surprisingly modern story for a fruit with Neolithic roots.

  The Mirabelle, by contrast, earned its place on merit and geography. Dark yellow in color, it is predominantly grown in northeast France and carries a regional identity that the more universally marketed Victoria never quite developed.

• 4. The Drupe's Architecture

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  Commercially grown plum trees are typically pruned to a height of 5-6 meters, though without pruning they can reach 12 meters and spread across 10 meters. The timing of their blossoms varies widely by climate: trees in Taiwan flower in about January, while those in the United Kingdom do not blossom until early April.

  A plum is technically a drupe, meaning its fleshy exterior surrounds a single hard fruitstone that encloses the seed. The fruit ranges from 2-7 centimeters in diameter, globose to oval in shape, with a smooth peel carrying a natural waxy surface that adheres directly to the flesh. In a good year, roughly 50% of the flowers on a plum tree are pollinated and develop into fruit. Flowering begins after 80 growing degree days.

  Conditions have to be right. Too little rain and the developing plums fall from the tree while still tiny green buds. Too much rain at harvest time, or any delay in picking ripe fruit, opens the door to a fungal condition called brown rot. Brown rot is not toxic and affected areas can sometimes be cut away, but if it is not caught immediately the fruit becomes inedible. The tree also feeds the larvae of several Lepidoptera, including the November moth, the willow beauty, and the short-cloaked moth.

• 5. Brandy, Rice Balls, and Dried Snacks

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  Raw plums are 87% water and 11% carbohydrates, supplying 46 calories per 100 grams. They provide a moderate amount of vitamin C, at 11% of the Daily Value, with no other micronutrient in significant quantity. What they lack in nutritional density they more than make up for in culinary range.

  In the Balkans, plums are distilled into slivovitz, a brandy called šljivovica in Bosnian, Croatian, Montenegrin, and Serbian. In Romania, 80% of the entire plum harvest goes into a similar brandy called tuica. Hungary grows large quantities of the Damson variety, known locally as szilva, and uses them to make lekvar, a plum paste jam, along with palinka, plum dumplings, and other foods. In central England, a cider-like drink called plum jerkum is made from plums in the traditional style.

  In Japan, umeboshi, pickled plums, are a standard filling for rice balls called onigiri or omusubi. The ume fruit used to make umeboshi is technically more closely related to the apricot than to the plum. Across Chinese grocers and specialty stores worldwide, dried plums come in cream, ginseng, spicy, and salty varieties, often flavored with licorice to intensify the taste. Licorice-treated plums also appear as toppings for shaved ice or baobing. Salted dried plums sold as snacks are sometimes called saladito or salao in other markets.

  Beyond food, plum kernel oil is pressed from the fleshy inner part of the pit. Plum wood, though not commercially available, is used by hobbyists for musical instruments, knife handles, and inlays.

• 6. China, Romania, and the Global Harvest

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  In 2023, world production of plums combined with sloes reached 12.5 million tonnes. China alone accounted for 55% of that total. Romania and Chile were the next largest producers, though at a considerable distance from China's dominant share.

  Japanese or Chinese plums, cultivars of Prunus salicina or its hybrids, dominate the fresh fruit market worldwide because of their large size, juicy texture, and long shelf life. The cultivars developed in the United States are mostly hybrids of Prunus salicina with Prunus simonii and Prunus cerasifera. Despite the name Japanese plums, two of the three parent species in these hybrids originated in China, and one came from Eurasia.

  Plum seeds, also called kernels, contain amygdalin, a cyanogenic glycoside that produces a cyanide-like poison. The same compound is found in many other members of the rose family. This detail, buried in the fruit's chemistry, is one reason prune kernel oil is processed rather than consumed raw, and why the wood and pits of the plum tree are handled with care even as the flesh remains one of the world's most widely eaten fruits.

• 7. Names That Travel

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  The English word plum descends from Old English plume, itself derived from the West Germanic loanword pluma, which came from Latin prunum, which borrowed from Ancient Greek proumnon, believed to be a loanword from an unknown language of Asia Minor. In the late eighteenth century, the word plum in English took on a secondary meaning: something sweet or agreeable, likely a reference to the tasty fruit pieces found in desserts, as in the term sugar plum.

  The name travels erratically across the world's languages and markets. In Thailand, Malaysia, and Indonesia, marian plums, also known as gandaria or plum mango among many other names, are called plums despite being quite different from the fruit recognized under that name in Europe or the Americas. The loquat, likewise, is called Japanese plum and Japanese medlar in some contexts, while in South Asia the Jambul fruit from a tropical tree in the family Myrtaceae is sometimes called damson plums, even though it is unrelated to European damsons.

  The Jambul alone carries more than a dozen names: Java plum, Malabar plum, Jaman, Jamun, Jamblang, Jiwat, Salam, Duhat, Koeli, Jambuláo, and Koriang. A single fruit, wearing a dozen identities, is a reminder that the word plum has always meant something slightly different depending on where you stand, a pattern that goes back at least as far as the unnamed Asian language that gave Ancient Greek its word for the fruit.