Threeleaf Foamflower (Tiarella trifoliata) is in the saxifrage family family (Saxifragaceae). Across the U.S., iNaturalist users have logged 3,183 research-grade flowering observations of it in our sample, peaking in July.
Nationally it blooms mainly from May to August, but timing varies a lot by state and elevation — see the table below.
When to photograph Threeleaf Foamflower: observations by month (U.S.)
About Threeleaf Foamflower
Tiarella trifoliata, the three-leaf foamflower, is a species of flowering plant in the family Saxifragaceae. The specific name trifoliata means "having three leaflets", a characteristic of two of the three recognized varieties. Also known as the laceflower or sugar-scoop, the species is found in shaded, moist woods in western North America.From Wikipedia via iNaturalist — article, CC BY-SA.
Threeleaf Foamflower by state
| State | Observations | Peak month | Main season |
|---|---|---|---|
| Washington | 1,582 | July | May–Aug |
| California | 785 | June | May–Jul |
| Oregon | 396 | July | May–Aug |
| Alaska | 228 | July | Jun–Aug |
| Montana | 126 | July | Jun–Aug |
| Idaho | 65 | July | Jun–Jul |
Main season = months with at least 30% of the state's peak-month count.
Related wildflowers (saxifrage family)
Creeping Foamflower
Virginia saxifrage
Twoleaf Miterwort
Fringe Cups
Hillside Woodland Star
California Saxifrage
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 Threeleaf Foamflower?
Nationally, July has the most observations, with the main season from May to August.
Where is Threeleaf Foamflower most often seen?
The most observations come from Washington, California, Oregon.