How to Grow Japanese Cedar
Cryptomeria japonica
Japanese Cedar is an elegant, fast-growing evergreen conifer with feathery soft needles that turn reddish-bronze in winter. Plant in moist, well-drained, slightly acidic soil with shelter from cold winds. It thrives in full sun to partial shade and needs very little pruning — just remove dead wood in late winter. Mulch annually to retain moisture and keep the roots cool. Garden cultivars stay at a manageable 10–15 m; dwarf forms suit smaller gardens.
Yearly Lifecycle
Care Essentials
Mulch generously with composted bark or garden compost in spring. A balanced slow-release fertiliser can be applied in early spring for young trees. Avoid high-nitrogen feeds.
Watch For
- Honey fungus
- Red spider mite in dry conditions
- Phytophthora root rot in waterlogged soils
- Needle browning from winter wind scorch
Care Requirements
Light
Full sun to partial shade
Grows best in full sun but tolerates partial shade. In hotter climates light afternoon shade helps prevent needle scorch. Avoid deep shade which causes sparse, open growth.
Watering
Regular moisture; drought-sensitive when young
Water regularly during the first two to three years after planting. Established trees are moderately drought-tolerant but prefer consistent moisture. Avoid waterlogged conditions which cause root rot.
Fertilizing
Annual spring mulch; slow-release feed for young trees
Mulch annually with composted bark or garden compost in spring. Young trees benefit from a balanced slow-release fertiliser in early spring. Established trees need little feeding beyond mulching.
Pruning
Minimal pruning; remove dead wood in late winter
Requires very little pruning. Remove dead or damaged branches in late winter before growth begins. Avoid hard cutting back into old wood as the tree will not regenerate from bare stems.
Spacing
6 m minimum; dwarf cultivars 1.5–3 m
Full-sized trees need at least 6 m from buildings, walls, and other trees. Dwarf and slow-growing cultivars can be planted 1.5–3 m apart. Always check the mature spread of your specific cultivar.
