Cryptomeria japonica

Japanese Cryptomeria, Japanese Cedar

Taxodiaceae

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Habitat

  • native to China and Japan
  • hardy to zone 6

Habit and Form

  • an evergreen coniferous tree
  • pyramidal or conical with a single trunk
  • dense when young, developing more clustered, tiered branching with age
  • has a graceful habit
  • medium texture

Summer Foliage

  • evergreen, spirally arranged, awl-shaped needles
  • needles are 4-angled and curve inward with a slight twist
  • needles persist 4 to 5 years
  • the first needles produced each year are shorter than later needles
  • dark green to bluish-green color; glossy

Autumn Foliage

  • evergreen foliage develops a distinct bronze to brown color during cold months, especially in windy exposed locations
  • foliage regreens in the spring

Flowers

  • monoecious, with male and female flowers
  • inconspicuous

Fruit

  • terminal cones are produced
  • cones are 0.5" to 1" diameter and are globe-shaped
  • color is dark brown

Bark

  • a very nice reddish-brown
  • it shreds in long strips, not unlike Chamaecyparis sp.
  • quite showy

Culture

  • prefers a rich, deep, moist soil that is light and contains significant organic matter
  • full sun is best
  • protection from wind is essential
  • likes a moderated environment

Landscape Use

  • as a specimen tree
  • for decoration
  • could be used in groupings as a large screen

Liabilities

  • most notable is the limitation of insufficient cold hardiness for exposed locations in zone 6 or colder
  • winter burn and injury
  • possibly difficult to find
  • retained dead foliage can detract

ID Features

  • evergreen, spirally-arranged needles persist 4 to 5 years
  • conical shape with tufted or plumed foliage
  • red-brown shredding bark
  • distinct bronze color in cold months

Propagation

  • by seed
  • by cuttings

Cultivars/Varieties

'Lobbii' - This is a fastigiate/columnar form, growing to 30' tall and much less wide. The foliage is deep green, bronzing in cold weather.

'Vilmoriniana' - A compact form to about 3' tall. Has dense foliage that turns a mottled gold and purple color in the fall. A good rock garden plant. Numerous other dwarf selections exist with slight variations on this dwarf theme.

'Yoshino' - Perhaps the most commonly available form in New England nurseries. The summer foliage is blue-green and it bronzes in winter to a purplish-brown hue. Reports indicate fast growth and pyramidal habit to 30' tall.

© Copyright Mark H. Brand, 1997-2015.

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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.