Cryptomeria japonica
Japanese Cryptomeria, Japanese Cedar
Taxodiaceae
ExpandHabitat
- 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.