Based on 4,705 research-grade iNaturalist flowering observations in Washington, Pacific trillium blooms mainly from April to May, peaking in April. It ranks #1 among wildflowers recorded in the state in our data.
Trillium ovatum
Pacific trillium in Washington by month
Bars show research-grade observations per month. They mix true seasonality with how often people are outdoors, so treat small numbers with caution.
Also in bloom in Washington in April
Salmonberry
Western Skunk Cabbage
Pacific Bleeding Heart
Red-flowering Currant
Lawn daisy
Small Camas
Red Deadnettle
Annual Honesty
Places to look in Washington
National ForestGifford Pinchot National Forest
National ForestOlympic National Forest
State ParkPeace Arch Park
National ForestColville National Forest
National ForestMount Baker–Snoqualmie National Forest
Botanical GardenBellevue Botanical Garden
FAQ
When does Pacific trillium bloom in Washington?
Mainly April–May, with the most records in April.
How common is Pacific trillium in Washington?
It ranks #1 by number of iNaturalist flowering observations among wildflowers in Washington (4,705 records in our sample).