Photo courtesy of Spotswood Greenery
Photo courtesy of Spotswood Greenery
Photo courtesy of Spotswood Greenery
Photo courtesy of Spotswood Greenery
Photo courtesy of Spotswood Greenery
Rosa 'Radslam' Orange Glow™ Knock Out® PP35,826
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Orange Glow Knock Out® Rose carries luminous orange flowers blended with yellow and pink, a warmer and more complex color than anything else in the family. Rosa 'Radslam' grows about 4.5 feet tall and 3 feet wide in full sun, hardy from Zone 4 through Zone 11.
Bloom repeats from spring to frost, abundant and continuous.
Knock Out roses were bred for disease resistance first. They hold clean foliage through humid summers with no fungicide, bloom continuously without deadheading, and need nothing beyond a hard cutback in early spring. That combination is why they took over the landscape trade.
The habit is bushy and upright, taller than wide, which suits a narrow bed or a spot where floor space is short. This is one of the newest introductions in the line and won the People's Choice Award at the 2026 American Rose Center trials. Cut back by about a third in early spring. Shipped on its own roots.
Height 4'- 5' Spread 2'- 3'
USDA Hardiness Zones 5-11
Lowest Temperatures -20°F to -10°F
Full sun - more than 6 hours of direct sun per day
Reblooming
Give your new plant the best start possible. Click here for general planting instructions.
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