Siebold Ash

Fraxinus sieboldiana

Oleaceae · broadleaf deciduous shrub · introduced

Last updated May 10, 2026

Plant Profile

Size & Form

Height

20–30 ft

Growth Rate

Medium

Site Requirements

Light

Full Sun

Soil Drainage

Moist

Soil pH

4.5-8.5

Water

Moderate

Hardiness

Zones 6a–8b

Ornamental Interest

Origin

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

Verticillium WiltHigh

Root Colonization Period

Peak Population & Dispersal

Fall webwormHigh

Larval Feeding & Web Building

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.