Larix kaempferi (Japanese Larch)


Botanical Information

FamilyPinaceae
GenusLarix
Specieskaempferi
SynonymsLarix leptolepis
CategoryWoody
TypeTree (deciduous)
ReferencesDirr, Michael A. revised 2009. Manual of Woody Landscape Plants. Champaign, Illinois: Stipes Publishing L.L.C. Knopf, Alfred A. copyright Sibley, David A. 2009. The Sibley Guide to Trees. New York, New York: Scott & Nix, Inc.
OriginMountains of Japan in Central island of Honshu, and Northern island of Hokkaido.
Ethnobotanical Uses
Disclaimer
Best used for large areas such as parks or golf courses but also used as ornamental plantings.
Pronunciation

Details

USDA Hardiness Zone4 - 7b
USDA Hardiness Ref.
Canadian Hardiness Zone2 - 7a
Canada Hardiness Ref.
RHS Hardiness ZoneH7
RHS Hardiness Ref.
Temperature (°C)-35 -(-9)
Temperature (°F)-30 - 10
Height20-40 m
Spread9-12 m
GrowthMedium
Flowering PeriodApril, May

Description and Growing Information

General DescriptionIs a deciduous conifer. Large tree with whorls of light green needles that change to yellow and orange in the autumn months. Along with horizontal branching.
ID CharacteristicHas reddish-brown shoots. The bark is grey with a rusty-brown inner bark. Needles grow in a whorled form which fall off the tree in the winter.
ShapeStraight stemmed and pyramidal crown. Open conical shape. Horizontal branching.
LandscapeWell used in open areas such as golf courses and parks. Strong durable wood used for construction. Used as material for bonsai and used as ornamental piece in parks and gardens.
PropagationMain method of propagation is seed. Should be sown from late winter to spring. Propagate by softwood or semi-ripe cuttings in the summer. Graft in the winter.
CultivationGrown in full sun. Well-drained soils but can tolerate poorly drained soils. Acidic to neutral soil conditions. Tree is easily transplanted when it is in its dormant stage.
PestsPests may include Japanese beetles, woolly aphids, sawflies and larch bark beetles. Larch bark beetles are the greatest threat and will kill the tree (thought to only occur in Northern Britain). Potential diseases may include cankers, needle cast, needle rust and honey fungus.
HabitatJapan.
Bark/Stem DescriptionBark on young trees are scaly and grey with elongated plates. As the tree matures it gets a reddish-brown inner bark.
Flower/Leaf Bud DescriptionConical to rounded shaped buds that are a reddish-brown to glaucous purple. Pointed and scaled buds that are resinous.
Leaf DescriptionLeaves are needle-like and are 2.5-3 cm long. Start out as single leaves and as plant mature the leaf structure becomes whorled. Needles are green to glaucous-blue and turn orange to yellow before dropping in autumn.
Flower DescriptionMale flowers are small and rounded with a yellow colour. Female flowers may be yellow, red, pink or green with long, curved scales. Blossoms in early spring April- May.
Fruit DescriptionBrown cones ranging from 2-4 cm long. Cone scales that are strongly reflexed with a rosette appearance. Cones mature in autumn to early winter.
Colour DescriptionGreen foliage throughout spring and summer months. Needles turn a golden colour in autumn before dropping. The outer bark is a greyish-brown with the inner bark being reddish-brown. Brown cones in which the trees seeds are held in. Flowers in early spring range from yellow, red, pink to green.
Texture DescriptionIt has a fine to medium foliage texture but becomes coarser in the winter.

Photographs