Zone 4 · Great White Trillium
Planting Great White Trillium in Zone 4
Trillium grandiflorum
✅ Great White Trillium thrives in zone 4 (hardy 4–8)
Can I plant today?
⏳ Too early to direct-sow
Last frost is in 4 weeks. Wait until soil warms.
Evaluated for April 27, 2026 ·
Zone's last frost
around May 15
Zone's first frost
around September 15
Bloom window
April – May
Peak bloom
April
Sun required
shade
Mature height
14"
Spacing
12" apart
Type
perennial
How to plant Great White Trillium in zone 4
Plant dormant rhizomes in fall in rich humus. Buy nursery-propagated only — never dig from the wild.
Pair with these for continuous bloom
Great White Trillium peaks in April. These companions keep your bed in color before and after.
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