Hardiness: 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) USDA Zone 10a: to -1.1 °C (30 °F) USDA Zone 10b: to 1.7 °C (35 °F)
On Jun 3, 2009, trioadastra from Ellsworth, WI (Zone 4a) wrote:
"Reseeds" is an understatement. I planted a few seeds 3 years ago, and they keep coming back with such a vengeance! I had to move a nearby coreopsis before they could conquer it completely. It's nice to have such a reliable patch of them every year; they have smothered the area around my lilies and are great filler for after the lilies bloom. I have to remove the occasional seedling that pops up 20 ft away, but it's a small price to pay for their flower power.
On Jun 10, 2008, CurtisJones from Longmont, CO wrote:
From your friends at Botanical Interests, inc.: We were blown away when a supplier sent us photos of a field of California Poppy 'Mission Bells'! A confetti of color - the beautiful, silky saucer-shaped pink, rose, red, orange, white and yellow, double and semi-double flowers look best when planted in large groups. The plants are drought-tolerant, once established. This variety is perennial in USDA zone 7 and warmer, but may reseed itself in cooler climates. This native U.S. wildflower is an excellent choice for "naturalized" or wildflower plantings and for soil erosion control.
This plant has been said to grow in the following regions:
Sitka, Alaska Longmont, Colorado Minneapolis, Minnesota Roswell, New Mexico Ashley, Pennsylvania North Augusta, South Carolina Austin, Texas West Valley City, Utah Wilkeson, Washington Ellsworth, Wisconsin