Crataegus crus
Crataegus crus
Rosaceae · broadleaf deciduous tree · introduced
Last updated
Data Maturity Structured
This profile synthesizes data from multiple published sources. Expert field review is in progress.
Quick Facts
Height
32 ft
Spread
32 ft
Growth Rate
Medium
Light
Sun to Part Shade
Soil
Wet Tolerant
Water
High
Hardiness
Zone Zones 4a–7b
Phenological Calendar
As of April 23, 2026, Puget Sound stations range from 1434.4 to 1592.7 GDD₃₂. Crataegus crus typically reaches leaf emergence at 1539 GDD₃₂, predicted around Apr 25.
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of Apr 23, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 1,593 | Leaf emergence | — | — |
| Seattle / UW | 1,554 | Leaf emergence | — | — |
| Kent / Auburn | 1,537 | Pre-season | Leaf emergence | 2 |
| Olympia / Tumwater | 1,505 | Pre-season | Leaf emergence | 35 |
| Bellingham / Whatcom | 1,483 | Pre-season | Leaf emergence | 56 |
| Tacoma / Puyallup | 1,472 | Pre-season | Leaf emergence | 67 |
| Sequim / Rain Shadow | 1,434 | Pre-season | Leaf emergence | 105 |
| Stage | GDD32 | Typical Window |
|---|---|---|
| ○ Leaf emergence BBCH 11 NEXT | 1539 | — est. Apr 25 (forecast) |
GDD = Growing Degree Days (base 32°F, Jan 1 start). Why base 32? Hover over GDD values for source details. Season tracker for Kent / Auburn as of Apr 23, 2026. Predicted dates use 16-day weather forecast through May 10, 2026, then climate normals.
Diseases (6)
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
Cultivars (1)
'Galli'
Common name: Cockspur Hawthorn; Mature height: 20–30 ft
Hardy to USDA Zone 4