
Booth's Evening Primrose (Eremothera boothii) is in the evening primrose family family (Onagraceae). Across the U.S., iNaturalist users have logged 881 research-grade flowering observations of it in our sample, peaking in March.
Nationally it blooms mainly from February to April, but timing varies a lot by state and elevation — see the table below.
When to photograph Booth's Evening Primrose: observations by month (U.S.)
About Booth's Evening Primrose
Eremothera boothii is a species of wildflower known as Booth's evening primrose. This plant is native to the western United States and northwestern Mexico where it is most abundant in arid areas such as deserts. This is an annual plant with hairy reddish-green stems and mottled foliage. The stem ends in a nodding inflorescence of many small flowers which may be white to red or yellowish, often with darker shades on the external surfaces of the...From Wikipedia via iNaturalist — article, CC BY-SA.
Booth's Evening Primrose by state
| State | Observations | Peak month | Main season |
|---|---|---|---|
| California | 856 | March | Feb–Apr |
| Nevada | 24 | April | Mar–Jun |
Main season = months with at least 30% of the state's peak-month count.
Related wildflowers (evening primrose family)

Fireweed

California fuchsia
Pinkladies

Browneyes

Ruby Chalice Clarkia
Winecup Clarkia

California primrose

Broadleaf Enchanter's Nightshade
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 Booth's Evening Primrose?
Nationally, March has the most observations, with the main season from February to April.
Where is Booth's Evening Primrose most often seen?
The most observations come from California, Nevada.