Species

Cryptomeria japonicaJapanese Cedar

18 other cultivars

tree

Rasen Japanese Cedar

Cryptomeria japonica 'Rasen'

The Story

Plant Bio

Cryptomeria japonica is a tall, pyramidal, evergreen conifer. 'Rasen' is a unique cultivar noted for its irregularly contorted and spiraling branches and foliage.

The name 'Rasen' means 'corkscrew' in Japanese, referring to its most distinctive feature: the spiraling needles and twisted branches that give it a highly textural and sculptural form. It grows as an irregular, upright pyramid.

Uses & Benefits:

Provides year-round greenery with elegant, feathery foliage that softens garden spaces.

Drought tolerant once established, requires minimal watering.

Supports local bird populations with its dense foliage.

SpeciesCryptomeria japonicaJapanese Cedar

Essentials

At a Glance

Plant Type

Tree

Height

240 inches

Width

96 inches

Light

Full Sun, Partial Sun

Zones

5, 6, 7, 8

Water

Medium

Humidity

Average

Lifespan

50+ years

Native To

Japan

Toxicity

Non-toxic to pets and humans

Bloom period

Late Winter – Late fall

In flower about 10 months of the year

Planting

How to Grow

Select a location with partial shade and well-drained soil.
Tuck young plants into prepared planting holes, ensuring root ball is level with soil surface.
Water thoroughly after planting to settle soil around roots.
Mulch around base to retain moisture and regulate temperature.
Mist cuttings regularly during propagation period, about 6 weeks.
Prune lightly to maintain shape and remove dead branches.

Pro Tip

Ensure good drainage and avoid exposed, windy sites for best growth.

Keep It Thriving

Care Guide

Do

Water regularly during dry spells 💧
Mulch annually to conserve moisture
Prune lightly to shape and remove dead wood

Don't

Avoid overwatering to prevent root rot ❌
Don’t expose to harsh, direct afternoon sun
Refrain from heavy fertilization

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Mulch
Pest Check
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Evergreen backdrop for gardensVertical accent in shrub borders

Companion Plants

Hostas Ferns Japanese maples Azaleas

Multiply

Propagation Methods

Good to Know

Common Questions

Rasen Japanese Cedar questions

What zones can Rasen Japanese Cedar grow in?

Rasen Japanese Cedar is hardy in USDA Zones 5–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Rasen Japanese Cedar deer resistant?

Yes — Rasen Japanese Cedar is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Rasen Japanese Cedar bloom?

Rasen Japanese Cedar typically blooms in late winter through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Rasen Japanese Cedar need full sun?

Rasen Japanese Cedar does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.