Green Manzanita Greenleaf Manzanita
Arctostaphylos patula
Ericaceae · broadleaf evergreen shrub · native
Last updated
This profile synthesizes data from multiple published sources. Expert field review is in progress.
Greenleaf manzanita is recognized by its smooth reddish-brown exfoliating bark and bright green, urn-shaped leaves. Native to open coniferous forest slopes across western North America at moderate to high elevations, it thrives where cool temperatures and rocky soil match its ecological niche.
Grows to 7 feet tall in full sun with moderate water needs and high drought tolerance once established (Zones 5a to 8b). Prefers well-drained, adaptable soils. Pinkish-white flowers appear in late spring; resprout ability aids recovery from disturbance. Monitor for leaf spot, rust, and Phytophthora dieback, common in humid conditions.
Quick Facts
Phenological Calendar
As of April 23, 2026, Puget Sound stations range from 1434.4 to 1592.7 GDD₃₂. Green Manzanita Greenleaf Manzanita has passed 'flower buds visible' (840 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 | 'Flower buds visible' | — | — |
| Seattle / UW | 1,554 | 'Flower buds visible' | — | — |
| Kent / Auburn | 1,537 | 'Flower buds visible' | — | — |
| Olympia / Tumwater | 1,505 | 'Flower buds visible' | — | — |
| Bellingham / Whatcom | 1,483 | 'Flower buds visible' | — | — |
| Tacoma / Puyallup | 1,472 | 'Flower buds visible' | — | — |
| Sequim / Rain Shadow | 1,434 | 'Flower buds visible' | — | — |
| Stage | GDD32 | Typical Window |
|---|---|---|
| 'Bud break' BBCH '07' | 840 | '' |
| 'First bloom' BBCH '61' | 840 | '' |
| ● 'Flower buds visible' BBCH '51' NOW | 840 | '' |
GDD = Growing Degree Days (base 32°F, Jan 1 start). Why base 32? GDD₃₂ thresholds from USA National Phenology Network citizen science observations (WA+OR). Season tracker for Kent / Auburn as of Apr 23, 2026. Predicted dates use 16-day weather forecast through May 10, 2026, then climate normals.