Siebold Ash

Fraxinus sieboldiana

Oleaceae · broadleaf deciduous shrub · introduced

Last updated May 10, 2026

Quick Facts

Height

20–30 ft

Growth Rate

Medium

Light

Full Sun

Soil

Moist

Water

Moderate

Hardiness

Zone Zones 6a–8b

Origin

Japan and central China Alert: An invasive, non-native

Anthracnose (Shade Trees)High

Primary Spore Release

Nectria CankerHigh

Spore Release (Fall & Spring Rains)

Verticillium WiltHigh

Root Colonization Period

Oystershell scaleHigh

Crawler Emergence

+ 5 more — see full disease and pest lists below

Diseases: Regionally Documented (8)

Discula destructiva (dogwood), Kabatiella and Discula spp... Anthracnose Coin Canker Symptom category — not a single disease Leaf Spot Mistletoe Phytophthora syringae Phytophthora Canker Verticillium dahliae Verticillium Wilt Sclerotinia spp. White Mottled Rot Neonectria ditissima Nectria Canker

Pests: Regionally Documented (8)

Aphidoidea Aphid Ash borer Prionoxystus robiniae Carpenterworm Hyphantria cunea Fall webworm Parthenolecanium spp. Lecanium scale Caloptilia syringella Lilac leafminer Lepidosaphes ulmi Oystershell scale Coccoidea Scale insect

Pests: Other Associations (1)

Agrilus planipennis Emerald ash borer

Data Maturity

Structured Multiple sources. Expert review underway.