Little Wood Rose
Rosa gymnocarpa
Rosaceae · broadleaf deciduous shrub · native
Last updated
This profile synthesizes data from multiple published sources. Expert field review is in progress.
Little wood rose (Rosa gymnocarpa), also called baldhip rose, is a broadleaf shrub in the Rosaceae family native to western North America from the Rocky Mountains to the Pacific Coast, British Columbia to California. It reaches 6 ft tall and produces pink solitary flowers approximately 2 inches across. It naturally occurs in shaded woods below 1,800 meters.
Little wood rose is hardy in zones 5a-8b and prefers sun to part shade with moist soil (pH 4.5-8.5) and moderate water. Twenty-seven diseases and 29 pests are documented. The fruit has a low edibility rating (2/5). Seeds contain hair irritants.
Quick Facts
Phenological Calendar
As of April 23, 2026, Puget Sound stations range from 1434.4 to 1592.7 GDD₃₂. Little Wood Rose has passed 'leaf emergence' (1471 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 | 'Leaf emergence' | — | — |
| Seattle / UW | 1,554 | 'Leaf emergence' | — | — |
| Kent / Auburn | 1,537 | 'Leaf emergence' | — | — |
| Olympia / Tumwater | 1,505 | 'Leaf emergence' | — | — |
| Bellingham / Whatcom | 1,483 | 'Leaf emergence' | — | — |
| Tacoma / Puyallup | 1,472 | 'Leaf emergence' | — | — |
| Sequim / Rain Shadow | 1,434 | 'Bud break' | 'Leaf emergence' | 37 |
| Stage | GDD32 | Typical Window |
|---|---|---|
| 'Bud break' BBCH '07' | 591 | '' |
| ● 'Leaf emergence' BBCH '11' NOW | 1471 | '' |
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.