Russian Hawthorn

Crataegus ambigua

Rosaceae · broadleaf deciduous tree · introduced

Last updated March 8, 2026

Data Maturity Structured

This profile synthesizes data from multiple published sources. Expert field review is in progress.

Quick Facts

Height

15–40 ft

Light

Full Sun

Hardiness

Zone Zones 5a–8b

Origin

southern Russia ambigua: uncertain, doubtful (an apparent

Diseases (6)

Venturia inaequalis Scab Thekopsora minima and Naohidemyces vaccinii Rust Symptom category — not a single disease Leaf Spot Erwinia amylovora Fire Blight Symptom category — not a single disease Canker Multiple obligate biotrophic fungi (Erysiphales: Erysipha... Powdery Mildew

Pests (12)

Tetranychidae Spider mite Coccoidea Scale insect Caliroa cerasi Pear slug Dysaphis crataegi Hawthorn aphid Choreutis pariana Apple-and-thorn skeletonizer Acanthococcus azaleae Azalea bark scale Enarmonia formosana Cherry bark tortrix Hyphantria cunea Fall webworm Tortricidae Leafroller Pear sawfly (pear slug) Malacosoma spp. Tent caterpillar Pear sawfly