Formosan Toad Lily
Tricyrtis formosana · Liliaceae
📷 Didier Descouens · CC BY-SA 4.0
The gardener's calendar
Formosan toad lily is in full bloom: enjoy it, watch watering in hot weather and let spent flowers feed pollinators before pruning.
ID card
- Scientific name
- Tricyrtis formosana
- Family
- Liliaceae
- Type
- Herbaceous perennial
- Adult height
- 60 to 80 cm
- Flowering
- August to October
- Foliage
- Deciduous
- Hardiness
- Zone 6-9 (-20 to -15°C)
- Origin
- Taiwan (Formosa)
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability medium.
Expert tips
The key tip
Tricyrtis formosana loves dense shade and humidity. Plant under heavy canopy, enrich with compost.
The common mistake
Exposing it to sun or drought severely reduces plant vigor and flowering.
The pro's trick
Divide clumps every 2-3 years in April: reliable and free propagation.
Seasonal watch
Slugs August-September: major threat to young shoots.
Care
Light Exposure
Tricyrtis prefers partial to full shade, ideally under tree cover or in a semi-shaded spot in your garden. Dappled light throughout the day suits it perfectly. Avoid intense direct sunlight, which can scorch the delicate foliage and reduce flowering.
Watering
Keep the soil regularly moist, especially during the growing and flowering periods. Water deeply during dry spells, without waterlogging the substrate which should remain fresh yet well-drained. In winter, reduce watering after the plant goes dormant.
Soil
Plant your tricyrtis in soil rich in organic matter, slightly acidic to neutral and very well-draining. Improve the soil at planting time with potting mix or well-decomposed compost to promote moisture retention while preventing root suffocation.
Fertilizing
Apply balanced fertilizer in spring when growth resumes and again in early summer. Well-decomposed compost added in autumn naturally enriches the soil. Avoid excess feeding which would promote foliage at the expense of flowering.
Pruning and Cleanup
No formal pruning is necessary. Simply remove damaged or diseased stems in spring. In autumn after flowering, you can cut the plant back to ground level or leave the dried stems to protect the rhizomes during winter.
Diseases and Pests
Tricyrtis is generally hardy but may suffer from powdery mildew in humid, poorly ventilated conditions. Good air circulation prevents most problems. Inspect foliage regularly and remove affected parts to prevent spread.
Did you know?
Tricyrtis, nicknamed the 'poor man's orchid' by shade garden enthusiasts, bears extraordinarily exotic flowers with speckled petals that genuinely resemble orchids. Native to Taiwan's forested mountains, this rare and precious plant has become emblematic of modern Asian gardens for its spectacular ability to bloom in shade, where few other plants dare match its elegance.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
Add this plant to my garden →Plants from the same family
- Crown imperialFritillaria imperialis
- Hairy Toad LilyTricyrtis hirta
- Tulipa hybrTulipa hybr
- Fritillaria raddeanaFritillaria raddeana
- Gagea luteaGagea lutea
- Wild tulipTulipa sylvestris
Tips generated and checked by Viridia — adapt them to your local climate.