Variety profile

Hirado Buntan Pummelo

(Citrus maxima 'Hirado Buntan')

Documented by Léo — grown in the ground, USDA zone 8b

The Hirado Buntan Pummelo (Citrus maxima 'Hirado Buntan') is an old Japanese pummelo variety grown for centuries on Hirado Island in Nagasaki Prefecture, considered one of the best pummelos in the world for its sweetness. Its hardiness reaches 12°F (−11°C) on the tree, among the hardiest pummelos, making it suitable for in-ground growing in USDA zones 8a to 8b. The vigorous tree reaches 13 to 20 ft (4 to 6 m) with an imposing rounded habit, glossy evergreen foliage, and very fragrant white blossom. Its golden yellow, very large fruits (14 to 28 oz, or 400 to 800 g), with thick skin, ripen in winter and offer juicy, sweet, low-acid, pinkish-white flesh that is exceptionally fragrant. Excellent for fresh eating and refined fruit salad. A variety for lovers of sweet pummelos. Graft onto Poncirus trifoliata, plant against a south-facing wall, in well-drained soil.

A citrus tree bearing large pale yellow fruit
Photograph: Hirado buntan arbre.jpg by Jpbrigand, CC BY-SA 4.0, via Wikimedia Commons
Cold hardiness 12°F (−11°C)

Identity

OriginJapan (Hirado Island, Nagasaki Prefecture)
Genetic originOld pummelo (Citrus maxima) selection from a seedling on Hirado Island
USDA zone
Cold hardiness12°F (−11°C)
Fruit cold hardiness25°F (−4°C)
GrowthVigorous
Height13 ft (4 m)
HarvestJanuary, February, December
SeedsModerate
FlavorsSweet, Balanced, Highly aromatic

History & Description

Origin

The Hirado Buntan is one of the most renowned pummelos in Japan, native to the small island of Hirado, in Nagasaki Prefecture, off the northwest tip of Kyushu. Its history goes back to the 18th century, when a spontaneous pummelo seedling (probably from seeds brought from Indochina via the port of Hirado, then the only trading point with Europeans and Chinese under the Sakoku isolation policy) is said to have given rise to a tree with exceptional fruits. Selected and propagated by local farmers, the Hirado Buntan became over the centuries an emblematic regional specialty, grown in orchards on the sunny hillsides of the island and recognized as a product of the Japanese terroir. The term "Buntan" (文旦) designates pummelos in general in Japanese, and the prefix "Hirado" identifies this particular selection, distinguished by its sweetness without bitterness and its hardiness superior to classic tropical pummelos. Introduced to France by Pépinière du Bosc, it is now among the hardy pummelos most sought after by collectors of Japanese citrus.

Tree description

The Hirado Buntan forms a vigorous tree of 10 to 13 ft (3 to 4 m) at maturity, with an upright habit and evergreen foliage of a bright green, with the large leaves characteristic of pummelos. Its growth is fast and sustained, and the tree is productive from its fifth year on FA5 or Poncirus trifoliata rootstock. The very fragrant white spring blossom is abundant and lasts several weeks. Its remarkable hardiness, documented down to 12°F (−11°C) for a well-established adult tree, makes it one of the most cold-resistant pummelos marketed in France, superior to classic pummelos, usually limited to 18°F (−8°C).

Fruit quality

The fruits, voluminous (about 14 oz, or 400 g), have a round, slightly flattened shape and thick skin, golden yellow at maturity. The flesh, of an intense golden color, stands out for its particularly thin segment membranes, a very rare trait in pummelos that considerably eases eating. The flavor is remarkably sweet and juicy, without the bitterness typical of Citrus maxima, with very measured acidity and delicate floral aromas. Seeds are present in moderate quantity.

Flavor and ornamental interest

Harvested between December and February, the Hirado Buntan is ideally eaten fresh, cut into segments, where its thin membranes and juicy flesh make it one of the most pleasant pummelos to eat. Much appreciated by Japanese chefs, it goes into refined salads with olive oil and herbs, into delicate sorbets, or simply as a dessert fruit. As an ornamental, its medium stature, dense foliage, and golden fruits hanging in winter make it a remarkable landscape subject, evoking the traditional orchards of Hirado Island, a living heritage of Japanese citrus growing in a French hardy-citrus garden.
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"Growing rare citrus means accepting that nature has the last word, while whispering in its ear how to survive the winter."

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