Hardiness: 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)
On Nov 23, 2007, macybee from Deer Park, TX (Zone 9a) wrote:
It is easily identified with it's petiolate leaves, recurved sepals and relatively short petals. It has a similar color range to T lancifloium, although is normally a brownish-maroon to red-maroon. It has a very wide range for a sessile trillium and can be quite variable in size, petal color and leaf marking.
On Mar 14, 2006, Malus2006 from Coon Rapids, MN (Zone 4a) wrote:
This is a very thriving plant with interesting foliage for those who can't grow most of the southern species. It is rated to zone 4a hardy. I had no trouble with it, except for its slow spreading rate. I wish there are better words than "Prairie Trillium" since that makes people think it grows in full sun, not in woodland. It grows in neutral to slightly alkaline soil in woodland shade in sandy soil. It have smaller petals than the other sessile species that grows in zone 4.