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Juglans ailanthifolia
  • Japanese Walnut

a perennial woody deciduous member of the Juglans genus in the family Juglandaceae.

Niche
  • Canopy
    Canopy
    There are no details available for this niche.
Functions
  • None
    None
    There are no functions defined for this plant. Do you know of some? Click the edit button to add them!
Light
  • Full sun
    Full sun
    The amount of sun exposure that a plant prefers in ideal conditions.
    Key
  • no shade
    No shade
    The amount of shade a plant will tolerate without adverse health affects.
    Key
Water
  • Water Requirementsmoderate
    Moderate
    The amount of water a plant needs for healthy growth, relative to other plants.
    Key
Soil
  • acid,neutral,alkaline
    Acid to Alkaline
    The PH range (acidity or alkilinity) of the growth medium ideal for healthy nutrient absorbtion.
    Key
  • Sandy to Clay
    The soil texture this plant prefers for optimal growth.
    Key
Cold & Heat
  • 4
    Zone 4
    The USDA Hardiness scale assigns plants a number from 1 to 12 representing the minimum temperature a plant can survive.
    Key
    0< -53.9ºC< -65ºF
    1-51.1ºC-60ºF
    2-45.6ºC-50F
    3-40ºC-40ºF
    4-34.4ºC-30ºF
    5-28.9ºC-20ºF
    6-23.3ºC-10ºF
    7-17.8ºC0ºF
    8-12.2C10ºF
    9-6.7ºC20ºF
    10-1.1ºC30ºF
    114.4ºC40ºF
    12> 10ºC> 5ºF
  • ?
    Unknown
    The AHS Heat scale assigns plants a number from 1 to 12 representing the number of days per year a plant requires a temperature exceeding 30ºC (86ºF).
    Key
    11
    21 - 7
    38 - 14
    415 - 30
    531 - 45
    646 - 60
    761 - 90
    891 - 120
    9121 - 150
    10151 - 180
    11181 - 210
    12181 - 210
Juglans ailanthifolia has 0 edible uses listed
Juglans ailanthifolia has 0 material uses listed
Juglans ailanthifolia has 0 medicinal uses listed

Uses

Edible uses

Notes

Seed - raw, cooked or used in confectionery[1][2][3][4]. A very good flavour[5]. The shell is easily cracked[6].

An edible oil is obtained from the seed, but it tends to go rancid quickly[4].

Young buds (flower?) and fruit stalks - cooked[2][3][4].

Leaves

Unknown use

Unknown part

Oil

Seed

Unknown use

Material uses

A brown dye is obtained from the seed husks and the bark[7]. Rich in tannin, it does not require a mordant.

The bark is rich in tannin. It is used as a dye and also medicinally[8]. Plants produce chemicals which can inhibit the growth of other plants. These chemicals are dissolved out of the leaves when it rains and are washed down to the ground below, reducing the growth of plants under the tree[9][10][11]. The roots of many members of this genus produce substances that are toxic to many plant species, especially apples (Malus species), members of the Ericaceae, Potentilla spp and the white pines (certain Pinus spp.)[12].

Wood - soft, light, not easily cracked, of good quality. Used for cabinet making etc[13][7].

Unknown part

Dye
Herbicide
Tannin
Wood

Medicinal uses(Warning!)

The bark is anthelmintic, astringent, diuretic, lithontripic, pectoral, skin, tonic (kidneys)[8].

Unknown part

Anthelmintic
Astringent
Diuretic
Kidney
Lithontripic
Pectoral
Skin
Tonic

Ecology

Ecosystem niche/layer

Canopy

Ecological Functions

Nothing listed.

Forage

Nothing listed.

Shelter

Nothing listed.

Propagation

The seed is best sown as soon as it is ripe in individual deep pots in a cold frame[14]. You need to protect it from mice, birds, squirrels etc. The seed usually germinates in late winter or the spring. Plant out the seedlings into their permanent positions in early summer and give some protection from the cold for their first winter or two. The seed can also be stored in cool moist conditions (such s the salad compartment of a fridge) over the winter and sown in early spring but it may then require a period of cold stratification before it will germinate[15][14].

Practical Plants is currently lacking information on propagation instructions of Juglans ailanthifolia. Help us fill in the blanks! Edit this page to add your knowledge.



Cultivation

Requires a deep well-drained loam and a sunny position sheltered from strong winds[16][17]. Prefers a slightly alkaline soil[12].

This is the hardiest member of the genus, capable of growing in all areas of Britain[18]. It is also resistant to the attacks of most insects[19]. The young growth in spring, however, can be damaged by late frosts. This species is cultivated for its edible seed in Japan, it has the potential for producing very superior nuts, especially if hybridized with J. cinerea[6][19]. Trees can come into bearing within 3 - 4 years from seed[18]. Plants produce a deep taproot and they are intolerant of root disturbance[16][17]. Seedlings should be planted out into their permanent positions as soon as possible and given some protection since they are somewhat tender when young[16][17]. Flower initiation depends upon suitable conditions in the previous summer[12]. The flowers and young growths can be destroyed by even short periods down to -2°c, but fortunately plants are usually late coming into leaf[12]. Any pruning should only be carried out in late summer to early autumn or when the plant is fully dormant otherwise wounds will bleed profusely and this will severely weaken the tree[12].

Trees have a dense canopy which tends to reduce plant growth below them. We have no specific information for this species, but the roots of several members of this genus produce substances that are toxic to many plant species, especially apples (Malus species), members of the Ericaceae, Potentilla spp and the white pines (certain Pinus spp.)[12]. The leaves of many species also secrete substances that have an inhibitory affect on plants growing underneath them. All in all this is not a very good companion plant[K].

Crops

Problems, pests & diseases

Associations & Interactions

There are no interactions listed for Juglans ailanthifolia. Do you know of an interaction that should be listed here? edit this page to add it.

Polycultures & Guilds

There are no polycultures listed which include Juglans ailanthifolia.

Descendants

Cultivars

Varieties

None listed.

Subspecies

None listed.

Full Data

This table shows all the data stored for this plant.

Taxonomy
Binomial name
Juglans ailanthifolia
Genus
Juglans
Family
Juglandaceae
Imported References
Edible uses
[1][2][3][4][5][6]
Medicinal uses
[8]
Material uses & Functions
[7][8][9][10][11][12][13]
Botanic
[17][20][12]
Propagation
Cultivation
Environment
Cultivation
Uses
Edible uses
None listed.
Material uses
None listed.
Medicinal uses
None listed.
Functions & Nature
Functions
Provides forage for
Provides shelter for
Environment
Hardiness Zone
4
Heat Zone
?
Water
moderate
Sun
full sun
Shade
no shade
Soil PH
acid, neutral, alkaline
Soil Texture
sandy, loamy, clay
Soil Water Retention
well drained
Environmental Tolerances
    Ecosystems
    Native Climate Zones
    None listed.
    Adapted Climate Zones
    None listed.
    Native Geographical Range
    None listed.
    Native Environment
    None listed.
    Ecosystem Niche
    Canopy
    Root Zone Tendancy
    None listed.
    Life
    Deciduous or Evergreen
    deciduous
    Herbaceous or Woody
    woody
    Life Cycle
    perennial
    Growth Rate
    ?
    Mature Size
    20 x 15 meters
    Fertility
    self fertile
    Pollinators
    Wind
    Flower Colour
    ?
    Flower Type
    monoecious











    References

    1. ? 1.01.1 Sholto-Douglas. J. Alternative Foods. ()
    2. ? 2.02.12.2 Tanaka. T. Tanaka's Cyclopaedia of Edible Plants of the World. Keigaku Publishing (1976-00-00)
    3. ? 3.03.13.2 Kunkel. G. Plants for Human Consumption. Koeltz Scientific Books ISBN 3874292169 (1984-00-00)
    4. ? 4.04.14.24.3 Facciola. S. Cornucopia - A Source Book of Edible Plants. Kampong Publications ISBN 0-9628087-0-9 (1990-00-00)
    5. ? 5.05.1 Hedrick. U. P. Sturtevant's Edible Plants of the World. Dover Publications ISBN 0-486-20459-6 (1972-00-00)
    6. ? 6.06.16.2 Rosengarten. jnr. F. The Book of Edible Nuts. Walker & Co. ISBN 0802707699 (1984-00-00)
    7. ? 7.07.17.2 Usher. G. A Dictionary of Plants Used by Man. Constable ISBN 0094579202 (1974-00-00)
    8. ? 8.08.18.28.3 Stuart. Rev. G. A. Chinese Materia Medica. Taipei. Southern Materials Centre ()
    9. ? 9.09.1 Philbrick H. and Gregg R. B. Companion Plants. Watkins (1979-00-00)
    10. ? 10.010.1 Riotte. L. Companion Planting for Successful Gardening. Garden Way, Vermont, USA. ISBN 0-88266-064-0 (1978-00-00)
    11. ? 11.011.1 McPherson. A. and S. Wild Food Plants of Indiana. Indiana University Press ISBN 0-253-28925-4 (1977-00-00)
    12. ? 12.012.112.212.312.412.512.612.7 Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press ISBN 0-333-47494-5 (1992-00-00)
    13. ? 13.013.1 Uphof. J. C. Th. Dictionary of Economic Plants. Weinheim (1959-00-00)
    14. ? 14.014.1 McMillan-Browse. P. Hardy Woody Plants from Seed. Grower Books ISBN 0-901361-21-6 (1985-00-00)
    15. ? Sheat. W. G. Propagation of Trees, Shrubs and Conifers. MacMillan and Co (1948-00-00)
    16. ? 16.016.116.2 F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press (1951-00-00)
    17. ? 17.017.117.217.3 Bean. W. Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. Murray (1981-00-00)
    18. ? 18.018.1 Howes. F. N. Nuts. Faber (1948-00-00)
    19. ? 19.019.1 Natural Food Institute, Wonder Crops. 1987. ()
    20. ? Cite error: Invalid <ref> tag; no text was provided for refs named PFAFimport-58


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    Facts about "Juglans ailanthifolia"RDF feed
    Article is incompleteYes +
    Article requires citationsNo +
    Article requires cleanupYes +
    Belongs to familyJuglandaceae +
    Belongs to genusJuglans +
    Has common nameJapanese Walnut +
    Has drought toleranceIntolerant +
    Has edible partLeaves +, Unknown part + and Seeds +
    Has edible useUnknown use + and Oil +
    Has fertility typeSelf fertile + and Wind +
    Has flowers of typeMonoecious +
    Has hardiness zone4 +
    Has lifecycle typePerennial +
    Has material partUnknown part +
    Has material useDye +, Herbicide +, Tannin + and Wood +
    Has mature height20 +
    Has mature width15 +
    Has medicinal partUnknown part +
    Has medicinal useAnthelmintic +, Astringent +, Diuretic +, Kidney +, Lithontripic +, Pectoral +, Skin + and Tonic +
    Has search namejuglans ailanthifolia + and x +
    Has shade toleranceNo shade +
    Has soil ph preferenceAcid +, Neutral + and Alkaline +
    Has soil teclayture preferenceClay +
    Has soil teloamyture preferenceLoamy +
    Has soil tesandyture preferenceSandy +
    Has soil water retention preferenceWell drained +
    Has sun preferenceFull sun +
    Has taxonomy nameJuglans ailanthifolia +
    Has water requirementsmoderate +
    Inhabits ecosystem nicheCanopy +
    Is deciduous or evergreenDeciduous +
    Is herbaceous or woodyWoody +
    Is taxonomy typeSpecies +
    Tolerates nutritionally poor soilNo +
    Uses mature size measurement unitMeters +