Double Knock Out® Rose

One of the longest-blooming, lowest-maintenance roses you can plant — waves of bright cherry-red, double blooms from spring straight through fall with no spraying or fussing.

The Double Knock Out® Rose (Rosa 'Radtko') took everything gardeners loved about the original Knock Out and gave it fuller, more romantic flowers. Each bloom carries roughly two dozen petals in a rich cherry-red to raspberry tone, opening in flush after flush over a tidy, rounded shrub that matures around 3 to 4 feet tall and wide. The foliage emerges with a deep burgundy cast in spring before settling into clean, glossy green, giving the plant color and structure even between bloom flushes. It is the rare rose that earns its place through sheer reliability rather than constant attention.

Why growers choose the Double Knock Out® Rose

• Months of color. It blooms continuously from spring to fall, self-cleaning so spent flowers drop on their own without deadheading.
• Full, double flowers. Cherry-red, many-petaled blooms give a more classic rose look than the single-flowered original.
• Built-in toughness. Bred for strong resistance to blackspot and powdery mildew, so it stays healthy without a regular spray schedule.
• Wide hardiness. Reliable in USDA zones 5 through 10, shrugging off cold winters and hot, humid summers alike.
• Low-fuss habit. A compact, well-branched 3-to-4-foot mound that needs only one hard prune a year to look its best.

Its compact size and nonstop color make it a natural for foundation plantings, low informal hedges, mixed shrub borders, and large containers on a sunny patio. Plant a row for a season-long ribbon of red, or tuck a single shrub among perennials where you want dependable, long-lasting bloom.