Coralburst Crabapple
Malus 'Coralcole'
Rosaceae · broadleaf deciduous tree · introduced
Last updated
Malus 'Coralburst' (Rosaceae) is a compact deciduous crabapple cultivar, typically grafted onto a standard to form a small, rounded tree. Double coral-pink flowers appear in profusion in spring. Small persistent fruit follows.
Coralburst performs best in full sun on well-drained soil. Bloom begins around 217 GDD (base 50 F) with full bloom near 263 GDD, making it one of the earlier-blooming crabapple cultivars. Its compact size suits smaller garden spaces and street tree plantings.
Quick Facts
Phenological Calendar
As of April 19, 2026, Puget Sound stations range from 1342.9 to 1500.8 GDD₃₂. Coralburst Crabapple has passed full bloom (1184 GDD₃₂).
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of Apr 19, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 1,501 | Full bloom | — | — |
| Seattle / UW | 1,465 | Full bloom | — | — |
| Kent / Auburn | 1,441 | Full bloom | — | — |
| Olympia / Tumwater | 1,415 | Full bloom | — | — |
| Bellingham / Whatcom | 1,390 | Full bloom | — | — |
| Tacoma / Puyallup | 1,381 | Full bloom | — | — |
| Sequim / Rain Shadow | 1,343 | Full bloom | — | — |
| Stage | GDD32 | Typical Window |
|---|---|---|
| Beginning of flowering BBCH 61 | 977 | — |
| ● Full bloom BBCH 65 NOW | 1184 | — |
GDD = Growing Degree Days (base 32°F, Jan 1 start). Why base 32? Source GDD₅₀ thresholds from Herms 2004 (OSU, Secrest Arboretum, Ohio) and UMD IPMnet (Gill & Klick, mid-Atlantic), converted to GDD₃₂ via Kent bloom-date mapping. Season tracker for Kent / Auburn as of Apr 19, 2026. Predicted dates use 16-day weather forecast through May 5, 2026, then climate normals.