Arrowleaf Buckwheat (Eriogonum compositum) is in the knotweed family family (Polygonaceae). Across the U.S., iNaturalist users have logged 944 research-grade flowering observations of it in our sample, peaking in May.
Nationally it blooms mainly from May to July, but timing varies a lot by state and elevation — see the table below.
When to photograph Arrowleaf Buckwheat: observations by month (U.S.)
Arrowleaf Buckwheat by state
| State | Observations | Peak month | Main season |
|---|---|---|---|
| Oregon | 429 | May | May–Jul |
| Washington | 400 | May | May–Jul |
| California | 113 | June | Jun–Jul |
Main season = months with at least 30% of the state's peak-month count.
Related wildflowers (knotweed family)
California Buckwheat
Low Smartweed
Desert Trumpet
Sulfur Buckwheat
American jumpseed
Naked Buckwheat
Japanese knotweed
American bistort
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 Arrowleaf Buckwheat?
Nationally, May has the most observations, with the main season from May to July.
Where is Arrowleaf Buckwheat most often seen?
The most observations come from Oregon, Washington, California.