Alphabetical Plant Listing

Trillium ovatum (Western Trillium)

Pacific Trillium, Pacific Wake-Robin, Western Trillium, Western Wake-Robin, Coast Trillium, Coast Wake-Robin


Trillium ovatum (Western Trillium) is a vigorous clump-forming perennial with erect stems clad with a whorl of 3 broadly ovate leaves. From the center of the leaf whorl emerges a solitary, pure white flower in late winter to late spring, adorned with 3 recurved petals and golden yellow anthers. Long-lasting, the large and charming blossoms turn pale pink as they age and give way to berry-like capsules. Western Trillium is a very long-lived species that is primarily pollinated by beetles, moths, and bumblebees. Easy to grow, this graceful Trillium is a lovely choice for wildflower gardens or woodland gardens.

  • Grows up to 10-18 in. tall (25-45 cm) and 8-12 in. wide (20-30 cm). Will spread gradually if left undisturbed.
  • Performs best in part shade or full shade, in deep, humus-rich, acid to neutral, moist, well-drained soils. Keep well watered during dry weather in spring and early summer. Mulch in fall with leaves.
  • Excellent when massed in shaded beds and borders, underplanting shrubs or roses.
  • Because trilliums go dormant by midsummer, pair them with other shade-loving perennials that will look good the rest of the gardening season and share their place until they reappear the following spring.
  • Generally disease free, this plant requires little maintenance. Watch out for slugs and snails.
  • Propagate by rhizome division (in fall) or seed. Seeds do best when planted outdoors soon after fruits have ripened. 1 month stratification is necessary.
  • Young plants can take 3-5 years to bloom and another 5-8 years to develop into a lovely clump.
  • Native to western North America

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Requirements

Hardiness 5 – 8
Heat Zones 5 – 8
Climate Zones 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 14, 15, 16, 17
Plant Type Perennials
Plant Family Trillium - Wake Robins
Exposure Partial Sun, Shade
Season of Interest Spring (Early,Mid,Late)
Summer (Early)
Winter
Height 10" – 2' (25cm – 60cm)
Spread 10" – 1' (25cm – 30cm)
Spacing 12" (30cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Showy
Native Plants United States, California, Pacific Northwest, Idaho, Oregon, Washington, Rocky Mountains, Colorado, Montana, Wyoming
Attracts Birds, Hummingbirds
Garden Uses Beds and Borders, Underplanting Roses and Shrubs
Garden Styles Informal and Cottage, Prairie and Meadow

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Brewbooks, Thomas Quine, Flickr, Randy Bjorklund, Nikki Yancey, Shutterstock

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 5 – 8
Heat Zones 5 – 8
Climate Zones 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 14, 15, 16, 17
Plant Type Perennials
Plant Family Trillium - Wake Robins
Exposure Partial Sun, Shade
Season of Interest Spring (Early,Mid,Late)
Summer (Early)
Winter
Height 10" – 2' (25cm – 60cm)
Spread 10" – 1' (25cm – 30cm)
Spacing 12" (30cm)
Water Needs Average
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Moist but Well-Drained
Characteristics Showy
Native Plants United States, California, Pacific Northwest, Idaho, Oregon, Washington, Rocky Mountains, Colorado, Montana, Wyoming
Attracts Birds, Hummingbirds
Garden Uses Beds and Borders, Underplanting Roses and Shrubs
Garden Styles Informal and Cottage, Prairie and Meadow

Great Plant Combination Ideas with Trillium - Wake Robins

Guides with Trillium - Wake Robins

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