Firethorn
'First bloom'Pyracantha coccinea
Rosaceae · broadleaf evergreen shrub · introduced
Last updated
Plant Profile
Size & Form
Height
10 ft
Spread
13 ft
Growth Rate
Moderate
Size at 20 yr
9 ft
Lifespan
Moderate
Site Requirements
Light
Full Sun
Soil Drainage
Well Drained
Soil pH
5.8-8.0
Water
Low
Drought Tolerance
Low
Hardiness
Zones 8b–9b
Ornamental Interest
Bloom Time
May
Origin
Southern Europe, Western Asia
Watch for this season
Adult Flight
Root weevilModerate
Adult Emergence & Foliar Feeding
Diseases: Regionally Documented (1)
Pests: Regionally Documented (2)
Phenological Calendar
As of June 3, 2026, Puget Sound stations range from 2435.5 to 2672.8 GDD₃₂. Firethorn has passed 'first bloom' (1490 GDD₃₂).
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of Jun 3, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 2,673 | 'First bloom' | — | — |
| Kent / Auburn | 2,665 | 'First bloom' | — | — |
| Seattle / UW | 2,610 | 'First bloom' | — | — |
| Olympia / Tumwater | 2,570 | 'First bloom' | — | — |
| Tacoma / Puyallup | 2,535 | 'First bloom' | — | — |
| Bellingham / Whatcom | 2,533 | 'First bloom' | — | — |
| Sequim / Rain Shadow | 2,436 | 'First bloom' | — | — |
View full calendar (1 stages)
| Stage | GDD32 | Typical Window |
|---|---|---|
| ● 'First bloom' BBCH '61' NOW | 1490 | '' |
Range: 1103–1372 GDD₃₂
(6yr)
Source: 'Master catalog (OSU), converted GDD50->GDD32 via Kent bloom-date mapping' About GDD₃₂ →
Season tracker for Kent / Auburn as of Jun 3, 2026. Predicted dates use 16-day weather forecast through Jun 19, 2026, then climate normals.
Data Maturity Structured Multiple sources. Expert review underway.