Great White Trillium plant profile
Trillium grandiflorum
A perennial flower for shade.
Last updated .
When to plant
When to plant Great White Trillium
Great white trillium blooms in spring (NC State, North Carolina: April to May) with a single large white flower above a whorl of three leaves. Plant or divide rhizomes in fall or early spring in shaded, humus-rich soil; it establishes slowly.
The calendar shows this cited seasonal window as an approximate band. It does not convert the season into frost-adjusted dates.
Open Great White Trillium in my garden calendarShows the source-backed planting season, not frost-adjusted dates.
Growing conditions
- Sun
- Shade
- Soil pH
- 6 to 8
- Lifecycle
- Perennial
- Hardiness
- Zones 4a to 8bFind my hardiness zone
Next steps
Continue with Great White Trillium
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Trillium grandiflorum (Great White Trillium)
North Carolina Extension Gardener Plant Toolbox (NC State Extension). Supports general reference. Checked 2026-06-18.