1 named cultivar
The Story
Plant Bio
Trillium grandiflorum, commonly known as large-flowered trillium, is a perennial woodland herb distinguished by its three broad, ovate leaves and large, white, three-petaled flowers that bloom in spring.
This species is highly valued for its striking, showy flowers that turn pink with age and its ability to thrive in shaded, moist woodland environments.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Perennial
Height
15 inches
Width
15 inches
Light
Partial Sun, Shade
Zones
4, 5, 6, 7, 8
Water
Consistently moist
Humidity
Prefers moderate to high humidity
Lifespan
Decades with proper care
Native To
Eastern North America
Toxicity
Yes, toxic if ingested
Planting
How to Grow
- Choose a shaded woodland spot with rich, moist soil
- Tuck seeds into the soil surface and gently press them down
- Keep soil consistently moist during germination, about 6 weeks
- Mulch with leaf litter to retain moisture and mimic natural habitat
- Transplant mature plants in early spring or fall for best establishment
- Avoid disturbance during flowering period
Pro Tip
Plant in a shaded location with rich, well-drained soil for best growth
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist 🌱
- Mulch to retain soil moisture and protect roots
- Fertilize with organic compost in early spring
Don't
- Avoid direct sunlight which can scorch leaves ❌
- Don’t disturb roots during dormancy
- Refrain from overwatering to prevent rot
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Mulch | ||||||||||||
| Plant | ||||||||||||
| Propagate | ||||||||||||
| Prune | ||||||||||||
| Spring Cleanup |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Great White Trillium questions
What zones can Great White Trillium grow in?
Great White Trillium is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Great White Trillium deer resistant?
Not reliably. Deer may browse Great White Trillium, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Great White Trillium bloom?
Great White Trillium typically blooms in mid to late spring through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Great White Trillium need full sun?
Great White Trillium does best in part shade.
More Trillium to compare
Missouri form Large-flowered Trillium
Trillium recurvatum 'Missouri form'
Vasey's Trillium
Trillium vaseyi
Toadshade
Trillium cuneatum
Large-flowered Trillium
Trillium grandiflorum 'Mix'
Rugel's Trillium
Trillium rugelii
Trillium x flexatum white w dark eye
Trillium x flexatum 'white w dark eye'
Keep exploring
Explore the genus
Hardy in your zone?
Grow Great White Trillium with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.