Rosa Double Knockout®, commonly known as Double Knockout Rose, is a compact, repeat-blooming shrub rose valued for its vibrant red double blooms and ease of care. Blooming continuously from spring through frost, this disease-resistant rose grows 3 to 4 feet tall and wide, with a neat, rounded habit and glossy green foliage.

Although beloved for its ornamental beauty and low maintenance, Double Knockout Rose is not a native species and offers limited ecological support compared to native flowering plants.

Why Choose Rosa Double Knockout®?

• Brilliant red double blooms from spring to frost
• Disease-resistant and low-maintenance
• Compact habit makes it ideal for borders, hedges, and mass plantings

Cultivating Tips

• Plant in full sun and well-drained soil for the best performance
• Deadhead spent blooms to encourage continuous flowering
• Prune in early spring to maintain shape and vigor

Design Ideas for Your Garden

• Mass plantings for a bold display of continuous color
• Use in mixed borders and foundation plantings
• Pair with native perennials and grasses to create a wildlife-friendly garden

Ecological Benefits

• Attracts some pollinators but offers limited ecological support
• Non-native species with minimal benefit to local wildlife and ecosystems
• Native alternatives provide better support for pollinators, birds, and biodiversity

Since Rosa Double Knockout® is not a native species, here are three native alternatives available at Bumbee’s that provide ecological benefits:

• Clethra alnifolia – Summersweet: Fragrant white flowers attract pollinators; thrives in moist soils and offers seasonal interest
• Monarda didyma – Scarlet Beebalm: Bright red flowers attract hummingbirds and pollinators; provides bold summer color
• Liatris spicata – Blazing Star: Tall purple flower spikes attract butterflies and bees; excellent for borders and pollinator gardens