Based on 4,359 research-grade iNaturalist flowering observations in California, Pacific trillium blooms mainly from February to April, peaking in March. It ranks #22 among wildflowers recorded in the state in our data.
Trillium ovatum
Pacific trillium in California 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 California in March
Redstem Stork's-bill
Checker Lily
Blue Dicks
Distant Phacelia
Desert Dandelion
Pacific hound's tongue
Desert Lily
Musk Stork's-Bill
Places to look in California
Botanical GardenThe Huntington Library, Art Museum, and Botanical Gardens
State ParkHearst Castle
Botanical GardenSan Francisco Botanical Garden
State ParkAnza-Borrego Desert State Park
National ForestAngeles National Forest
National ForestSequoia National Forest
FAQ
When does Pacific trillium bloom in California?
Mainly February–April, with the most records in March.
How common is Pacific trillium in California?
It ranks #22 by number of iNaturalist flowering observations among wildflowers in California (4,359 records in our sample).