Tall Stewartia

Stewartia monadelpha

Theaceae · broadleaf deciduous tree · introduced

Last updated

Tall stewartia is a deciduous tree native to Japan, reaching 40-60 feet tall in ideal conditions with smooth, mottled gray and tan bark. The tree produces white flowers with yellow stamens in midsummer and oblong leaves with excellent fall color in orange and red.

Stewartia monadelpha thrives in partial shade to full sun with well-drained, acidic, humus-rich soil and moderate moisture. Hardy to zones 5-8, it is slow to medium in growth and extremely ornamental year-round with summer flowers, fall color, and attractive winter bark. The tree requires consistent moisture and does not tolerate drought or heat stress.

Quick Facts

Height
20–25 ft
Growth Rate
Slow
Light
Part Shade
Soil
Well Drained
Water
Moderate
Hardiness
Zones 6a–8b
Fall Color
Red
Origin
Japan

Field Observations

Stewartia monadelpha - bud break
Field Observation
Stewartia monadelpha · Tall Stewartia
bud break
March 20, 2026 · Issaquah · 959 GDD₃₂ · BBCH 07

Phenological Calendar

Stage Typical Window
Bud break BBCH 07 Mar 15-Apr 1
Data Maturity
Baseline Extension data. Expert review underway.