Larix kaempferi

Japanese Larch

Pinaceae

Expand

Habitat

  • native to Japan
  • Zone 4

Habit and Form

  • deciduous conifer
  • 80' to 90' tall by 30' to 40' wide
  • very open conical shape
  • slender pendulous branchlets on heavy lateral branches
  • fine to medium foliage texture, coarse in winter
  • moderate to fast growth rate

Summer Foliage

  • deep green needles with two with stomatal lines on underside
  • 1" to 1.5" long
  • needles spirally arranged on long shoots
  • needles in clusters of 40 or more on short spurs
  • buds are brown, pointed and conical in shape with fringed scales
  • buds are resinous

Autumn Foliage

  • needles turn gold before dropping
  • typically showy

Flowers

  • monoecious
  • both male and female strobili cover tree in early spring
    • female: egg-shaped and about 0.25 to 0.75" long, in reds, pinks, yellows, or green
    • male: smaller and yellow
  • moderately attractive

Fruit

  • medium brown cones, stalked
  • 1" to 1.5" long
  • scales are overlapped, forming a rosette appearance
  • cones have reflexed scales
  • cones are persistent

Bark

  • grayish brown outer bark in thin, elongated plates
  • inner bark is a reddish color
  • dark brown young stems are furrowed and usually covered with some brown pubescence

Culture

  • easily transplanted when dormant
  • well-drained, slightly acidic to neutral soil is best, but can tolerate poorly drained soils
  • should be planted in the open, in full sun

Landscape Uses

  • open areas: golf courses, campuses, parks
  • specimen
  • good fall color

Liabilities

  • needs sufficient room to develop ideal form and habit
  • less hardy than L. decidua
  • larch case-bearer, woolly aphid and sawfly are pest problems
  • accumulation of cones and debris on ground
  • intolerant of shade, drought, pollution, and chalky soils

ID Features

  • spurs on branches
  • cones have a rosette shape
  • cones have reflexed scales
  • red-brown shoots
  • 2 white stomatal lines on underside of needles
  • cones are persistent on tree

Propagation

  • by seeds, grafts, and cuttings
  • cultivars: by grafting

Cultivars/Varieties

Numerous types have been discovered, but all one finds usually are the weeping cultivars.

'Blue Rabbit' - A shrubby form with irregular growth, this cultivar has bluish needles.

'Diana' - This is a very unusual form with contorted, twisted branches that resemble Corylus avellana 'Contorta' (Harry Lauder's Walking Stick).

'Pendula' (also listed as 'Inversa') - This is an umbrella name for various weeping larches of uncertain parentage. They usually form mop-headed small trees with distinctly pendulous branches.

© Copyright Mark H. Brand, 1997-2015.

The digital materials (images and text) available from the UConn Plant Database are protected by copyright. Public use via the Internet for non-profit and educational purposes is permitted. Use of the materials for profit is prohibited.

Citation and Acknowledgements: University of Connecticut Plant Database, http://hort.uconn.edu/plants, Mark H. Brand, Department of Plant Science and Landscape Architecture, Storrs, CT 06269-4067 USA.