Photo by Melody

PlantFiles: Trinity Flower, Wood Lily
Trillium chloropetalum

Family: Trilliaceae
Genus: Trillium (TRIL-ee-um) (Info)
Species: chloropetalum (klo-ro-PET-al-lum) (Info)

14 members have or want this plant for trade.


12-18 in. (30-45 cm)

15-18 in. (38-45 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)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Partial to Full Shade

Unknown - Tell us

Bloom Color:
Bright Yellow
Pale Green
Maroon (Purple-Brown)

Bloom Time:
Mid Spring

Grown for foliage

Other details:
Average Water Needs; Water regularly; do not overwater
This plant may be considered a protected species; check before digging or gathering seeds

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
Unknown - Tell us

Seed Collecting:
Unknown - Tell us

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By Galanthophile
Thumbnail #1 of Trillium chloropetalum by Galanthophile

By growin
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By Kell
Thumbnail #3 of Trillium chloropetalum by Kell

By Kell
Thumbnail #4 of Trillium chloropetalum by Kell


1 positive
1 neutral
No negatives

Gardeners' Notes:

Neutral macybee On Nov 23, 2007, macybee from Deer Park, TX (Zone 9a) wrote:

The giant trillium is found from California to Washington in western USA, in wooded or streamside situations. Growing up to 24" tall, it's flowers may be green, white, pink or maroon, with the 3 petals held upright. This species is more tolerant of dry shade than others.

Positive caraboof On Mar 22, 2004, caraboof from Spring, TX (Zone 9b) wrote:

lovely little shrub. Spikey and open. Lovely little magenta flowers. Don't know the official name. One thing tho. My Irish wolfhounds think the blossoms are quite delicious. While I would not purport to be an expert, they have suffered no ill effects, but they are 140 lbs. only about 2 ft tall so far, but have seen some taller. Don't bloom well in full shade.


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

San Leandro, California
Atlanta, Georgia
Decatur, Georgia
Salem, Oregon

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