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) USDA Zone 9a: to -6.6 °C (20 °F) USDA Zone 9b: to -3.8 °C (25 °F)
On Jun 23, 2008, jg48650 from Pinconning, MI (Zone 6a) wrote:
This is one of my favorite evening primroses. Last year, I bought one plant. It bloomed for three months, at least, and the stems were about 4' long. This year, I thought the plant hadn't survived, until I realized that it had self-sowed very easily. I probably have ten new plants, the first of which has just started blooming.
Has toothed, mid green, lance shaped leaves with a thick red vein running straight through the middle. Stems also have a reddish colouration. Bears saucer shaped, 4 petalled, brick red-orange flowers in late Summer.
Prefers a very well drained, poorish soil in full sun and self seeds where happy. Not always hardy in frost prone areas but produces many seeds, so keep collecting them just in case.
Ours grows in a container and nearly every year gets pulled up as a weed until I remember what it is.
This plant has been said to grow in the following regions:
Barbourville, Kentucky Pinconning, Michigan New Milford, New Jersey Newark, Ohio Allentown, Pennsylvania Vancouver, Washington Twin Lakes, Wisconsin