461 saves
Trillium
We track 26 varieties; the ones most used by real gardeners.
The 24 most-saved Trillium varieties
See all 26 Trillium varieties →Search this genus →
10 species of Trillium
Each one is a parent of the varieties above.
Track your Trillium in Sow
Save the Trillium you grow and get care reminders timed to your zone.
How to grow Trillium
Whats common across all Trillium varieties in our catalog — drawn from the care records of the 26 most-grown of them.
The Trillium year
- MulchNovember and December92% of varieties
Maintain a thick layer of leaf mulch to keep roots cool and moist.
- PlantSeptember–November88% of varieties
Plant dormant rhizomes in late fall, shallowly in rich, moist soil.
- FertilizeApril54% of varieties
Apply a light top dressing of compost or leaf mold in early spring.
- DivideAugust and September35% of varieties
Divide large, crowded clumps every 5-10 years when dormant
Do
- Water regularly to keep soil moist 🌱
- Water consistently to keep soil moist 🌱
- Fertilize with organic compost in early spring
- Keep soil consistently moist 🌱
- Plant in shaded areas with rich soil
Avoid
- Do not let soil dry out completely
- Avoid direct sunlight which can scorch leaves ❌
- Avoid overwatering to prevent root rot ❌
- Don’t expose to direct, hot sunlight
What goes wrong with Trillium
| Problem | What you'll see | What to do |
|---|---|---|
| Slugs | Chewed leaves and damaged stems | Use organic slug bait or handpick at night |
| Aphids | Sticky residue and distorted leaves | Apply insecticidal soap or neem oil |
| Slugs and snails | Chewed leaves and flowers | Use organic slug bait or handpick pests |
| Root rot | Wilting and browning leaves | Ensure well-drained soil and avoid overwatering |
| Root rot | Wilting and yellowing leaves | Improve drainage and reduce watering |
| Fungal leaf spots | Spots on leaves | Remove affected leaves and improve air circulation |
| Powdery mildew | White, powdery fungal growth on the surfaces of the bracts. | Avoid stagnant air conditions by ensuring adequate spacing and ventilation. |
Making more Trillium
Division
- Divide mature clumps in early spring or fall
- Replant divisions immediately into prepared soil
Seed sowing
- Collect mature seeds in late spring
- Tuck seeds into moist soil surface
- Keep soil consistently moist for 6 weeks
- Transplant seedlings once established
Trillium questions
How many types of Trillium are there?
The Sow catalog tracks 26 distinct Trillium varieties. The most popular — ranked by 461 real gardeners — are shown first above.
What zones does Trillium grow in?
Across its varieties, Trillium covers USDA Zones 4–9. Individual varieties differ — each plant page lists its exact range, and Sow filters the catalog to your zone automatically.
When does Trillium bloom?
Most Trillium varieties bloom in early spring, mid to late spring, mid-spring. Staggering early, mid, and late varieties extends the genus's season in one bed.
Which Trillium should I choose?
Start from the most-saved varieties above — popularity across thousands of gardens is a strong signal of reliability — then filter by your zone and sun. In the Sow app you can preview any of them in a photo of your actual yard before you buy.