When does Pacific Trillium bloom?

Pacific Trillium blooms from April through June, displaying white three-petaled flowers in spring woodlands.

Where is Trillium ovatum native?

Trillium ovatum is native to California, Oregon, South Dakota, and Washington, typically growing in moist forest understories.

What pollinators visit Pacific Trillium?

Pacific Trillium flowers attract bees and beetles, which serve as important pollinators for this native woodland species.

What growing conditions does Trillium ovatum prefer?

Pacific Trillium grows best in partial shade to shade with medium to high moisture levels, mimicking its natural forest habitat.

Is Pacific Trillium HOA-friendly?

Pacific Trillium takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Pacific Trillium

Name: Pollinator Patch
Author: Pollinator Patch

Trillium ovatum

Last reviewed: June 2026

Pacific Trillium (Trillium ovatum) is a native spring wildflower blooming April through June in California, Oregon, South Dakota, and Washington. This woodland perennial thrives in partial shade with medium moisture and attracts bees and beetles.

Light

part shade

Water

medium

Size

6"–18" H × 6"–12" W

Bloom

Apr, May, Jun

Native to

CA, OR, SD, WA

Pollinators

bees, beetles

Browse plants for this ecoregion

Coast Range Central California Valley

Pacific trillium is a woodland wildflower with distinctive three-petaled white flowers that bloom in spring. This low-growing perennial prefers shaded areas and goes dormant in summer, disappearing completely until the following spring.

Growing Pacific Trillium

Grow Pacific Trillium in part shade and medium water. Mature plants reach 6 to 18 inches tall and spread 6 to 12 inches wide. Expect low maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

Pacific Trillium takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.

Works well in: backyard only.

Completely dormant and invisible for most of growing season
Wild woodland appearance may look unkempt

Wildlife value

The flowers attract bees and beetles during the spring blooming period. As a woodland species, it provides early season nectar when few other plants are flowering.

Common questions

When does Pacific Trillium bloom?: Pacific Trillium blooms from April through June, displaying white three-petaled flowers in spring woodlands.
Where is Trillium ovatum native?: Trillium ovatum is native to California, Oregon, South Dakota, and Washington, typically growing in moist forest understories.
What pollinators visit Pacific Trillium?: Pacific Trillium flowers attract bees and beetles, which serve as important pollinators for this native woodland species.
What growing conditions does Trillium ovatum prefer?: Pacific Trillium grows best in partial shade to shade with medium to high moisture levels, mimicking its natural forest habitat.
Is Pacific Trillium HOA-friendly?: Pacific Trillium takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

Ready to grow Pacific Trillium? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

Add this plant to your garden

iPhone app Android app

Not sure where to start? Take the 2-minute yard quiz