Japanese Cedar
Cryptomeria japonica
Japanese cedar (Cryptomeria japonica, also called Sugi) is Japan's national tree and the sole species in its genus - an imposing evergreen conifer endemic to Japan. (It has been cultivated in China for centuries, but there is no firm evidence it ever occurred wild there.) In garden and landscape use it delivers year-round columnar presence, handsome fibrous coppery bark, and awl-like foliage that can bronze attractively in winter. The honest catch is scale and siting: in ideal conditions (deep, moist, acidic, well-drained soil with high humidity) it grows 131 to 197 feet tall and casts deep, dry shade that suppresses almost everything beneath it, and its pollen is the leading cause of seasonal hay fever in Japan.
Climate fit: moderate (41/100)
Focal point
Structure
Light
Full sun / Part sun
Water
Consistent moisture
Mature size
40-60 ft tall · 20 ft apart
Hardy in zones
6a-9b
cold to frosty winters
AHS heat range
2-9
Plant range authored in AHS heat-zone terms.
Native in Illinois
No
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No culinary use.
Cold hardiness
These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.
Now
Zone 6b
Plotwright
USDA Zone 6b
-5°F to 0°F
Well-suited
Zone 7a
Plotwright
0°F to 5°F
Well-suited
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
✓
Well-suited today and still thriving in 2050.
Heat tolerance
Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.
Loading AHS heat-zone data for this location...
Where this plant fits
Suitable across 27 ecoregions - 22 climate-resilient through 2070 · 2 suited today · 3 newly possible by 2070. Best matches first.
Similar plants
Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.
Educator packet
Plant packet
Japanese Cedar educator packet
Japanese cedar (Cryptomeria japonica, also called Sugi) is Japan's national tree and the sole species in its genus - an imposing evergreen conifer endemic to Japan. (It has been cultivated in China for centuries, but there is no firm evidence it ever occurred wild there.) In garden and landscape use it delivers year-round columnar presence, handsome fibrous coppery bark, and awl-like foliage that can bronze attractively in winter. The honest catch is scale and siting: in ideal conditions (deep, moist, acidic, well-drained soil with high humidity) it grows 131 to 197 feet tall and casts deep, dry shade that suppresses almost everything beneath it, and its pollen is the leading cause of seasonal hay fever in Japan.
Scientific name
Cryptomeria japonica
Plant type
tree
Hardiness
6a-9b
Light
full-sun, part-sun
Moisture
consistent
Spacing
240 inches
Classroom prompts
- Which plant traits are observations, and which are care recommendations?
- How would this plant fit change if the garden location moved warmer, colder, wetter, or drier?
- Which source-backed facts would you cite in a lesson handout?
Use the Sources & citations section below for page citation styles and the field-level source list.
Sources & citations
Cite this page
For lesson plans, articles, or research that uses this page. Use the source cards below to explore the references that informed this record.
Plotwright. (2026, May 17). Japanese Cedar (Cryptomeria japonica). Retrieved 2026, August 20, from https://plotwright.com/plants/cryptomeria-japonica
Sources used for this record
This record is compiled from the sources below.





