Firethorn
Pyracantha coccinea
Rosaceae · broadleaf evergreen shrub · introduced
Last updated
Data Maturity Structured
This profile synthesizes data from multiple published sources. Expert field review is in progress.
Quick Facts
Height
10 ft
Spread
13 ft
Growth Rate
Moderate
Light
Full Sun
Soil
Well Drained
Water
Low
Hardiness
Zone Zones 8b–9b
Bloom Time
May
Origin
Southern Europe, Western Asia
Phenological Calendar
As of April 23, 2026, Puget Sound stations range from 1434.4 to 1592.7 GDD₃₂. Firethorn has passed 'first bloom' (1490 GDD₃₂).
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 | 'First bloom' | — | — |
| Seattle / UW | 1,554 | 'First bloom' | — | — |
| Kent / Auburn | 1,537 | 'First bloom' | — | — |
| Olympia / Tumwater | 1,505 | 'First bloom' | — | — |
| Bellingham / Whatcom | 1,483 | Pre-season | 'First bloom' | 7 |
| Tacoma / Puyallup | 1,472 | Pre-season | 'First bloom' | 18 |
| Sequim / Rain Shadow | 1,434 | Pre-season | 'First bloom' | 56 |
| Stage | GDD32 | Typical Window |
|---|---|---|
| ● 'First bloom' BBCH '61' NOW | 1490 | '' |
Range: 1103–1372 GDD₃₂
(6yr)
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.