Painted Trillium

Trillium undulatum

Family: Trilliaceae
Genus: Trillium (TRIL-ee-um) (Info)
Species: undulatum (un-dew-LAY-tum) (Info)



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Unknown - Tell us

Where to Grow:

Unknown - Tell us


6-12 in. (15-30 cm)

12-18 in. (30-45 cm)


6-9 in. (15-22 cm)


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

Sun Exposure:

Light Shade

Partial to Full Shade

Full Shade


All parts of plant are poisonous if ingested

Bloom Color:

White/Near White

Bloom Time:

Mid Spring

Late Spring/Early Summer





Other details:

This plant may be considered a protected species; check before digging or gathering seeds

Soil pH requirements:

5.1 to 5.5 (strongly acidic)

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:


Propagation Methods:

By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:

Unknown - Tell us


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

Oakland, Maryland

Royal Oak, Michigan

Oneonta, New York

Newport Center, Vermont

Gardeners' Notes:


On Apr 3, 2016, coriaceous from ROSLINDALE, MA wrote:

This is a plant to enjoy in the wild, as its propagation and culture still elude the most skilled nursery people. Instead, try growing one of the many easier trilliums that can be nursery propagated.

In Michigan and Ohio, it's officially endangered. In Kentucky, it's listed as threatened, and in New York, it's considered exploitably vulnerable.

According to BONAP, it's also present but rare in South Carolina and New Jersey. Its range includes 18 states from Maine to Georgia and west to Michigan, and also 5 provinces from Ontario to Nova Scotia.


On Apr 22, 2009, CatskillDeb from Oneonta, NY (Zone 4a) wrote:

It is native in upstate NY, found at the higher elevations, often near tall pines. It blooms on our property in about the third week of May, usually after a warm rain. It develops a bright red seed in mid-summer that looks something like a fruit. The deer sometimes eat the flowers and the seed, so this trillium is not widespread. In addition to being known as almost impossible to transplant, it's also very slow to germinate from seed, taking 2 or more years to sprout and then up to 4 years to grow large enough to flower.


On May 18, 2008, malsprower from Daytona, FL wrote:

these plants are spectacular and they tend to grow everywhere here in Vermont. i saw one plant with six leaves!


On Apr 5, 2005, rcn48 from Lexington, VA (Zone 6a) wrote:

From William Cullina's Growing and Propagating Wildflowers of the United States and Canada:

Quoting: Painted Trillium is a striking species, with pure white, upward-facing flowers with a prominent triangle of red-purple in the throat that bleeds up along the veins of the petals to the tips. The fruit is a distinctive, smooth oval berry with a pointed tip. Painted Trillium is a common species in northern New England and southeastern Canada, but is very difficult to grow in cultivation, needing consistently moist, cool, acid soils and especially prone to rots in less than ideal conditions. I include it because this is a species often wild collected and sold as "nursery propagated", but you can be 99 percent sure that no nursery is really successfully propag... read more

I was fortunate to have large stands of this plant growing on the property I used to own in Maine. In early spring, its distinguishing feature is the bronze-green foliage versus the green of other Trilliums in the area.