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Fortunella japonica - (Thunb.)Swingle.

Common Name Round Kumquat
Family Rutaceae
USDA hardiness 8-11
Known Hazards None known
Habitats Not known in a truly wild situation[132].
Range E. Asia - China, Japan.
Edibility Rating    (3 of 5)
Other Uses    (2 of 5)
Weed Potential No
Medicinal Rating    (1 of 5)
Care (info)
Half Hardy Moist Soil Semi-shade Full sun
Fortunella japonica Round Kumquat


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Fortunella japonica Round Kumquat
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Summary


Physical Characteristics

 icon of manicon of shrub
Fortunella japonica is an evergreen Shrub growing to 2.5 m (8ft 2in).
It is hardy to zone (UK) 9 and is frost tender. It is in leaf all year. The species is hermaphrodite (has both male and female organs).
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.

UK Hardiness Map US Hardiness Map

Synonyms

Citrus japonica.

Habitats

Woodland Garden Sunny Edge; South Wall. By. West Wall. By.

Edible Uses

Edible Parts: Fruit
Edible Uses: Pectin

Fruit - usually cooked and used in jellies, preserves etc[183] or used as a flavouring, but it can also be eaten raw. The whole fruit, including the peel, is eaten[3, 132]. The fruit is acid whilst the peel is sweet[3, 132]. The peel is golden-yellow, smooth, thinner and somewhat sweeter than the oval kumquat, F. margarita[183]. The fruit is rich in pectin and makes excellent marmalades and jellies[240]. Vitamin C content is up to 0.24 mg/cc[240]. The fruit is about 4cm long[260].

References

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.
Antiphlogistic  Antitussive  Antivinous  Carminative  Deodorant  Expectorant  Stimulant

The plant is antiphlogistic, antivinous, carminative, deodorant, stimulant[178, 218]. The leaves and fruit contain an essential oil, whilst the fruit also contains sugars and organic acids[283]. The fresh fruit is antitussive and expectorant - in Vietnam it is steamed with sugar candy and used in the treatment of sore throats[283]. It is said to be very good for infants[283].

References

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An important new book from PFAF. It focuses on the attributes of plants suitable for food forests, what each can contribute to a food forest ecosystem, including carbon sequestration, and the kinds of foods they yield. The book suggests that community and small-scale food forests can provide a real alternative to intensive industrialised agriculture, and help to combat the many inter-related environmental crises that threaten the very future of life on Earth.

Read More

FOOD FOREST PLANTS

Other Uses

Deodorant  Essential  Pectin

The fresh leaves and young twigs yield 0.21% essential oil that might be suitable for perfumery[240].

Special Uses

Scented Plants

References

Cultivation details

Prefers a moderately heavy loam with a generous amount of compost and sand added and a very sunny position[200]. Prefers a pH of 5 to 6[200]. Plants are intolerant of water logging[200]. This species is not hardy in the colder areas of the country, when dormant it tolerates temperatures down to about -5°c[200]. The young growth in spring, even on mature plants, is frost-tender and so it is best to grow the plants in a position sheltered from the early morning sun[K]. Kumquats are widely cultivated in China for their edible fruit, there are many named varieties[3]. The plant is less vigorous, somewhat thorny and considerably more cold tolerant[183] (the report gives no details of what this is in comparison to!). Kumquats are hardier than the various Citrus species since they cease growth when temperatures drop below 13°c but, for best results, it is best to grow them in a climate where temperatures do not fall lower than between 4 and 10°c[3]. This is because the fruit is sweeter when it ripens in warm conditions[3].

References

Temperature Converter

Type a value in the Celsius field to convert the value to Fahrenheit:

Fahrenheit:

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Propagation

Seed - best sown as soon as it is ripe in a warm airy position in a greenhouse. When they are large enough to handle, prick out the seedlings into individual pots and grow them on in a greenhouse for at least their first two winters. Plant out in late spring or early summer after the last expected frosts and give some winter protection from the cold for a year or two.

Other Names

If available other names are mentioned here

Found In

Countries where the plant has been found are listed here if the information is available

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status :

Related Plants
Latin NameCommon NameHabitHeightHardinessGrowthSoilShadeMoistureEdibleMedicinalOther
Citrofortunella floridanaLimequatTree0.0 -  LMHNM20 
Citrofortunella microcarpaCalamondin OrangeTree5.0 -  LMHNM30 
Citrofortunella swingleiLimequatTree0.0 -  LMHNM20 
Fortunella margaritaOval KumquatShrub3.0 7-10  LMHNM301

Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.

 

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Expert comment

Author

(Thunb.)Swingle.

Botanical References

200275

Links / References

For a list of references used on this page please go here

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