Oregon woodsorrel (Oxalis oregana) is in the Woodsorrel Family family (Oxalidaceae). Across the U.S., iNaturalist users have logged 974 research-grade flowering observations of it in our sample, peaking in May.
Nationally it blooms mainly from April to September, but timing varies a lot by state and elevation — see the table below.
When to photograph Oregon woodsorrel: observations by month (U.S.)
About Oregon woodsorrel
Oxalis oregana (redwood sorrel, Oregon oxalis) is a species of the wood sorrel family, Oxalidaceae, native to moist Douglas-fir and coast redwood forests of western North America from southwestern British Columbia, Washington, Oregon, and California.From Wikipedia via iNaturalist — article, CC BY-SA.
Oregon woodsorrel by state
| State | Observations | Peak month | Main season |
|---|---|---|---|
| California | 479 | September | May–Sep |
| Oregon | 355 | May | Apr–May |
| Washington | 140 | April | Apr–May |
Main season = months with at least 30% of the state's peak-month count.
Related wildflowers (Woodsorrel Family)
Bermuda buttercup
Violet Woodsorrel
Redwood Sorrel
Mountain Woodsorrel
Upright Yellow Woodsorrel
Largeflower pink-sorrel
Photography tips
- Photograph flowers on calm, overcast mornings to avoid wind blur and harsh shadows.
- Get low: a shallow depth of field (f/2.8–f/5.6) isolates a bloom against soft color.
- Stay on trails — trampling meadows kills plants and ruins next year's display.
- Try a kaleidoscope abstract of a single bloom with our online kaleidoscope tool.
FAQ
When is the best time to photograph Oregon woodsorrel?
Nationally, May has the most observations, with the main season from April to September.
Where is Oregon woodsorrel most often seen?
The most observations come from California, Oregon, Washington.