Little Wood Rose
'Leaf emergence'Rosa gymnocarpa
Rosaceae · broadleaf deciduous shrub · native
Last updated
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
Primary Infection
Spring New Growth - Early Infection Window
Aecial Stage (Alternate Host)
Root Colonization Period
+ 8 more — see full disease and pest lists below
Phenological Calendar
As of May 14, 2026, Puget Sound stations range from 1926.1 to 2121.1 GDD₃₂. Little Wood Rose has passed 'leaf emergence' (1471 GDD₃₂).
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of May 14, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 2,121 | 'Leaf emergence' | — | — |
| Kent / Auburn | 2,113 | 'Leaf emergence' | — | — |
| Seattle / UW | 2,085 | 'Leaf emergence' | — | — |
| Olympia / Tumwater | 2,047 | 'Leaf emergence' | — | — |
| Tacoma / Puyallup | 2,016 | 'Leaf emergence' | — | — |
| Bellingham / Whatcom | 1,994 | 'Leaf emergence' | — | — |
| Sequim / Rain Shadow | 1,926 | 'Leaf emergence' | — | — |
| Stage | GDD32 | Typical Window |
|---|---|---|
| 'Bud break' BBCH '07' | 591 | '' |
| ● 'Leaf emergence' BBCH '11' NOW | 1471 | '' |
Source: 'NPN citizen science observations (WA+OR), n=10, median. services.usanpn.org' About GDD₃₂ →
Season tracker for Kent / Auburn as of May 14, 2026. Predicted dates use 16-day weather forecast through May 30, 2026, then climate normals.