Trillium undulatum (Painted Trillium)

One of the most attractive woodland Trilliums, Trillium undulatum (Painted Trillium) is a clump-forming rhizomatous perennial producing whorls of three broadly oval, basal, blue-green leaves. From mid-spring to early summer, ravishing white flowers, 2 in. across (5 cm), adorned with a splash of pink are borne above the leaves on a short, arching stem.

One of the most attractive woodland Trilliums, Trillium undulatum (Painted Trillium) is a clump-forming rhizomatous perennial producing whorls of three broadly oval, basal, blue-green leaves. From mid-spring to early summer, ravishing white flowers, 2 in. across (5 cm), adorned with a splash of pink are borne above the leaves on a short, arching stem. Each flower has three red-edged green sepals and 3 crinkly-edged, white petals with a carmine basal stripe. Easy to grow, this charming Trillium is a lovely choice for wildflower gardens or woodland gardens, where it will carpet the ground, regaling those who view it.

  • Grows up to 8-18 in. tall (20-45 cm) and 12 in. wide (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 woodland gardens, naturalized areas, or wildflower gardens. Pretty groundcover too!
  • 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.
  • The best time for planting is late summer or early fall as it gives the rhizomes time to establish good root systems before the following growing season.
  • Propagate by seed in pots in a shady cold frame as soon as the seed is ripe; takes 5-7 years to reach flowering size. Propagate rhizomes by division after flowering
  • Native to North America.

Requirements

Hardiness 4
– 8

Heat Zones 1
– 8

Plant Type Perennials
Plant Family Trillium – Wake Robins
Exposure Partial Sun, Shade
Season of Interest Spring (Mid,Late)Summer (Early)
Height 8"
– 2'
(20cm
– 60cm)
Spread 1'
(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, Midwest, Michigan, Ohio, Northeast, Connecticut, Maine, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Southeast, Georgia, Kentucky, North Carolina, South Carolina, Tennessee, Virginia, West Virginia
Garden Uses Beds and Borders, Ground Covers, Underplanting Roses and Shrubs
Garden Styles Informal and Cottage