Variety profile

Meiwa Kumquat

(Citrus crassifolia 'Meiwa')

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

Meiwa kumquat (Citrus crassifolia 'Meiwa') is a natural hybrid between the Marumi and the Nagami, regarded as the sweetest kumquat and the most pleasant to eat raw. The hardiness reference retained for the tree is 10°F (−12°C); whether it can be grown in the ground depends on the plant and the microclimate. Native to Japan, where it is very popular, the compact shrub reaches 6 to 10 ft (2 to 3 m), with a dense, rounded habit and evergreen foliage. Its dark orange, oval-round fruit, larger than that of the Marumi or Nagami, has a sweet skin and a pulp with more moderate acidity than other kumquats. Excellent eaten whole like a natural candy, in salads, or candied. Fragrant summer flowering. Choosing Poncirus trifoliata does not remove the need to protect young plants and fruit from frost. Prefers a south-facing wall and well-drained soil.

Identity

OriginChina
Genetic originProbable natural hybrid (Nagami × Marumi)
USDA zone
Cold hardiness10°F (−12°C)
Fruit cold hardiness25°F (−4°C)
GrowthSlow
Height10 ft (3 m)
HarvestJanuary, February, March, April
SeedsFew
FlavorsAcidless, Sweet, Very sweet

History & Description

Origin

Meiwa kumquat is an old variety from China, introduced to Japan in the Meiji era. Many consider it the best kumquat for fresh eating, often nicknamed the 'sweet kumquat'.

Tree description

The tree is small and slow-growing, with a bushy habit and thick leaves, slightly smaller than those of the Nagami. It is robust and adapts well to small spaces.

Fruit quality

Its fruits are round, sometimes slightly flattened, of medium size. The skin is thick, tender, and very aromatic, a deep orange when fully ripe.

Flavor and ornamental interest

It is the eating kumquat par excellence. Its flavor is markedly milder than that of the other varieties, with sweet flesh and very little acidity. It is eaten whole like a treat.

Hardiness — October 8, 2026 review: The reference is set at 10°F (−12°C) based on Agrumes de Provence. Listings range from 12°F (−11°C) at Aux Soleils de Manan to 7°F (−14°C) at Vessières. The latter figure is a nursery claim, not a guaranteed threshold. UCR historically reports a slightly lower resistance than Nagami, with no absolute figure. These temperatures apply to a mature, established, acclimated tree during a one-off frost; they guarantee neither the absence of damage nor a harvest. Wind, freeze duration, humidity, and pot culture change the risk.

Fruit resistance: The fruit reference of 25°F (−4°C) is kept: Aux Soleils de Manan advertises 25°F (−4°C), Vessières 23°F (−5°C). These figures concern the fruit, not the survival of the tree.

Hardiness references: Agrumes de Provence — Meiwa; Agrumerie Vessières — Meiwa; Aux Soleils de Manan — Kumquats et hybrides; UCR — Meiwa CRC 1471 (accessed October 8, 2026).
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What matters when choosing

Key points about Meiwa Kumquat

Meiwa is the kumquat to favor for fresh eating: its round fruit has a thick, sweet peel, less acidic pulp, and generally few seeds. Hardiness claims vary by grower; the selected reference is placed in context below.

Why choose it

  • Sweet flavor suited to eating the fruit whole.
  • Thick, sweet, aromatic peel.
  • Generally few seeds.

Its limits

  • Hardiness claims vary; protect the fruit separately from the tree.
  • Slow growth and sometimes limited availability.
  • Small fruit despite its rounded shape.

Practical notes

Shape
Round to slightly oval
Harvest
Late winter
Use
Whole fruit

Cold-hardiness reference: about 10°F (−12°C)

The selected reference is 10°F (−12°C), following Agrumes de Provence. Claims range from 12°F (−11°C) at Aux Soleils de Manan to 7°F (−14°C) at Vessières. The latter is a nursery claim, not a guaranteed threshold. UCR historically reports slightly lower resistance than Nagami without an absolute temperature.

Sources and method

The temperatures given are reference points for a mature tree with hardened wood. The table and callout repeat the same value as the profile. They guarantee neither freedom from damage nor a harvest after a freezing event.

Data reviewed on October 8, 2026.

"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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