Tricyrtis Species, Toad Lily

Tricyrtis ohsumiensis

Family: Liliaceae (lil-ee-AY-see-ee) (Info)
Genus: Tricyrtis (try-SER-tis) (Info)
Species: ohsumiensis (oh-soo-me-EN-sis) (Info)



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Requires consistently moist soil; do not let dry out between waterings

Where to Grow:

Grow outdoors year-round


6-12 in. (15-30 cm)

12-18 in. (30-45 cm)


6-9 in. (15-22 cm)

9-12 in. (22-30 cm)


USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

Sun Exposure:

Full Shade


Unknown - Tell us

Bloom Color:

Pale Yellow

Bloom Time:

Late Spring/Early Summer


Unknown - Tell us

Other details:

Unknown - Tell us

Soil pH requirements:

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:


Propagation Methods:

Unknown - Tell us

Seed Collecting:

Unknown - Tell us


This plant has been said to grow in the following regions:

Dearborn Heights, Michigan

Hopkins, Minnesota

Minneapolis, Minnesota

Lincoln, Nebraska

Gardeners' Notes:


On Jun 12, 2010, ms_greenjeans from Hopkins, MN (Zone 4a) wrote:

I just got two of these and planted them this spring (2010). They are growing well and look like they are ready to bloom; there are many buds forming. I am pleasantly surprised that I will see flowers already this year. I also like it that they bloom earlier in the year than other toad lilies. I do have some of the Blue Wonder variety; these really bloomed well last year and have multiplied significantly this year. I will have to watch in light of the other comment that they tend to die out within a few years. I hope not, because I have a real fascination with these unusual plants.


On Jan 9, 2008, Malus2006 from Coon Rapids, MN (Zone 4a) wrote:

This plant is very vigorous and I have divided a few plants into many different patches. Have flowers that look like orchids up close. Very zone Minnesota 4 hardy compare to other species. The few other purple flower species or cultivars tend to die after three or four years for me after starting to spread well. Could be too low temperature or disease? The only purple flower to survive for me is a cutivar by the now dead Rice Creek Nursery "Rice Creek" which is a dwarfer form but it's barely spreading but I have it for 5-6 years now on shaded rock garden slope. Seedheads held up for longer period of time until heavy snow crush them. Look good with medium to large hostas as they bloom during early summer while most hosta bloom mid to late summer and grows to about 1 1/2 to 2 feet tall. Lik... read more