Bartlett Tree Experts: Katsura Tree

Cercidiphyllum japonicum

Deciduous tree famous for its autumn colour and lush kidney shaped leaves. Native to East Asia: particularly Japan, China, and Korea where it is now endangered (although low risk). Plants are known to give off a sweet candy floss/burnt sugar scent in autumn hence the other common name of Candyfloss Tree. It can sometimes be confused with the Judas Tree (Cercis siliquastrum). However, the Katsura is generally much taller and can grow over 15m tall vs 8 to 12m for the Judas Tree. Japanese folklore says that the shadow areas on the moon are caused by Katsura trees there that cannot be cut down. Notable cultivars include Rotfuchs ' which has purple leaves; 'Amazing Grace' and 'Pendulum' are weeping varieties.

Culture
Concerns
Management

Culture for Katsura Tree

Prefers full sun to partial shade. Grows best in rich soils but prefers a sheltered site with slightly acid to neutral soil (pH 5 to 6.5).

Concerns about Katsura Tree

Susceptible to frost damage in spring. Shallow rooted, may be more susceptible to surface root damage, soil compaction, deep planting, constrained soil. Generally disease free.

Management Practices for Katsura Tree

Generally disease free. Monitor for nutrient deficiencies and pH imbalance, as this tree is prone to foliar chlorosis symptoms. The upright branches are naturally dense and tightly packed. Thinning is not generally recommended but removal of suckers/epicormic growth is recommended if a clear stemmed tree is desired.