Knock Out® Rose
Rosa Knock Out® cultivars
Description: This group of hardy, long blooming and disease resistant roses has made rose growing a more practical endeavor for busy home gardeners. Prior to the introduction of the first Knock Out® rose, easy, disease resistant roses were hard to find. Roses commonly available required extensive maintenance for meager rewards of bloom.
The family of Knock Out® roses now includes ten distinct selections: the original red-pink single (Rosa ‘Radrazz’); Double Knock Out® (Rosa ‘Radtko’) which is pink; Pink Knock Out® (Rosa ‘Radcon’)- a paler single pink; Rainbow Knock Out® (Rosa ‘Radcor’) which bears coral petals with a yellow center; Blushing Knock Out® (Rosa ‘Radyod’) with pale pink flowers that fade as the petals age; Sunny Knock Out® (Rosa ‘Radsunny’) which is a light clear yellow which fades to cream; White Knock Out® (Rosa ‘Radwhite’) with single pure white petal; Peachy Knock Out®(Rosa ‘Radgor’) with pink petals and yellow center; Coral Knock Out®(Rosa Radral) with brick orange fading to coral; Double Pink Knock Out®(Rosa Radtkopink) with double bubblegum pink petals.
These undemanding shrubs will grow 3-4′ tall, but can be maintained smaller. Blooming will occur off and on all summer until hard frost. The hedge of Knock Out® Roses that surrounds the elliptical lawn adjacent to the Winter Garden at Tower Hill began blooming in early June, rested a moment, and continued to flower until early November.
- Type/habit: Shrub rose
- Key season and features of interest: Abundant, colorful blossoms with long bloom season and light fragrance
- Flowering period: July thru frost
- Evergreen or deciduous: Deciduous
- Native? No
- Pollinator plant: Attracts bees
- Wildlife benefits: N/A
- Site/Condition tolerance: Drought and heat; light shade
- Sun/Shade Preference: Full sun
- Soil Condition Preference: Loose, organic, well drained, moist, slightly acidic soil; good air circulation
- Easy to grow; black spot resistant; powdery mildew tolerant
Growth Habit: Vigorous, compact, bushy habit; flowers tend to self-clean preventing rose hip formation
Size (mature height and spread): 3-5’ tall and wide
Hardiness (USDA Zones): 5-9
Nativity: Hybrid origin
Suggested Uses: Hedge, border, masses, accent, foundation
Year of award: 2012