Hardiness: 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: Light Shade
Danger: All parts of plant are poisonous if ingested
Bloom Color: Bright Yellow
Bloom Time: Mid Spring
Foliage: Herbaceous Silver/Gray
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)
On Nov 23, 2007, macybee from Deer Park, TX (Zone 9a) wrote:
Syns Trillium sessile var luteum, Trillium viride
From Appalachian woodlands of eastern USA, this species is distinguished by its rather pointed leaves that are spotted and splashed with paler green, and small stalkless yellow-green flowers that do not open very widely.
On Mar 14, 2006, Malus2006 from Coon Rapids, MN (Zone 4a) wrote:
This trillium was one of the few thriving populations that I have. Sadly I had to put it under neutral as all of one population which was my only population was wiped out along with several nearby native plants one winter. I have planted some new ones a short location away two years ago and is nonblooming. I don't know what happened even though there was a firepit nearby but leaves don't show sighs of scorching or stresses.
On Mar 18, 2004, Tiarella from Tunnel Hill, GA (Zone 7a) wrote:
This is probably the easiest trillium to grow and will naturalize through much of the country. Here in zone 7a (the southernmost area of it's natural population), it appears in mid-March and is usually gone by July 1 with a short bloom season in April.
The yellow flowers add a bright note to the garden and have a lemon smell. I like to plant trilliums with ferns to fill the bed before the ferns emerge.
Trilliums like moist soil but sharp drainage and are found on shaded hillsides in nature.
Seeds must be planted fresh to produce a seedling the following spring. Allowing the seed to dry out will delay germination by a year and germination rates will decline. First year seedlings resemble blades of grass, second year seedlings have a broader almost heart-shaped leaf, and the third year seedling will be a small, three-leaved plant. It may take 7 or more years to have a flowering plant.
On May 31, 2003, lupinelover from Grove City, OH (Zone 6a) wrote:
One of the last trilliums to bloom in this part of the country. The yellow sepals and petals remain for weeks, giving the impression that it is in bloom for a very long period.
As soon as the seed is ripe, the plant goes dormant.
Foliage is mottled with silver and white.
This plant has been said to grow in the following regions:
Blue Mountain, Alabama Cordele, Georgia Indianapolis, Indiana Hebron, Kentucky Louisville, Kentucky Lexington, Massachusetts Ann Arbor, Michigan Royal Oak, Michigan Fridley, Minnesota Minneapolis, Minnesota (2 reports) Honeoye, New York Glouster, Ohio Grove City, Ohio Butler, Pennsylvania East Norriton, Pennsylvania Laflin, Pennsylvania Wrightsville, Pennsylvania Hope Valley, Rhode Island Knoxville, Tennessee Middle Valley, Tennessee Newport, Tennessee Viola, Tennessee Kingston, Washington