Singleleaf Ash

Fraxinus anomala

Oleaceae · broadleaf deciduous shrub · introduced

Last updated April 7, 2026

Plant Profile

Site Requirements

Light

Full Sun

Hardiness

Zones 4a–8b

Ornamental Interest

Bloom Time

mid spring

Origin

extends from southeastern California west to Colorado and

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)

Neonectria ditissima Nectria Canker 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

Pests: Regionally Documented (8)

Ash borer Aphidoidea Aphid 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.