Hardiness: USDA Zone 3a: to -39.9 °C (-40 °F) USDA Zone 3b: to -37.2 °C (-35 °F) 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) 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)
Sun Exposure: Full Sun
Bloom Color: Bright Yellow
Bloom Time: Mid Summer Late Summer/Early Fall Mid Fall Blooms repeatedly
Other details: Drought-tolerant; suitable for xeriscaping
On Jun 28, 2009, s_jones from Aurora, CO (Zone 5a) wrote:
Vigorous and long-blooming, my Sunrays thrive in mild shade or full sun, and seem unbothered by the heat of river rock mulch that I now regret ever having installed. Continuous, repeat flowers provide months of entertainment for seed collectors.
However, the plants seem prone to diseases and pest problems; they withstand the assaults quite well, but their foliage do not escape unscathed. Consider this a tepid positive rating, unless you are good at identifying and heading off such problems in advance.
On May 20, 2009, mcrousse from Holly Springs, NC (Zone 7b) wrote:
Easy plant from seed, and fast-growing its first year. Tall when in flower and very showy. However I have had trouble keeping this plant alive all summer, even with great dirt and good watering. About half of them do well and others don't. Could be that it doesn't like our humidity that well. Maybe someone else from the southeast can report.
On Apr 22, 2005, Jelaine from Chiloquin, OR wrote:
This is a beautiful plant which blooms all summer long in S. central Oregon, zone 5. The only problem is it is susceptible to cucumber beetles. Two years in a row my three plants have been devoured and almost destroyed.
On Jan 6, 2003, saya from Heerlen Netherlands (Zone 8b) wrote:
This is a fine blooming plant that flowers all summer special when you deadhead it or cut it a little back it goes on until frost comes. Very reliable !
This plant has been said to grow in the following regions:
Aurora, Colorado Between, Georgia Hebron, Kentucky Pinconning, Michigan Endicott, New York Holly Springs, North Carolina North Augusta, South Carolina Gillett, Texas Kalama, Washington Olympia, Washington Lake Lac La Belle, Wisconsin Madison, Wisconsin