Double Knock Out® Rose

About the Double Knock Out® Rose Plant

Enjoy twice the blooms and classic rose beauty! The Double Knock Out® Rose (Rosa ‘Radtko’) features an abundance of lightly fragrant, cherry red double blooms with twice the number of petals as the original Knock Out® Rose. Its classic rose shape, paired with deep purplish-green foliage, adds a striking, colorful accent to any landscape.

Bred by Will Radler in Milwaukee, Wisconsin, this variety was released in the early 2000s. It quickly gained international recognition, winning an Australian Gold Medal (2004) and earning the Master Rose title in 2019 from the American Rose Trials for Sustainability.

Why Gardeners Love the Double Knock Out® Rose

• Continuous Blooms from late spring until the first frost
• Self-cleaning flowers—no deadheading required
• Excellent disease resistance to black spot and downy mildew
• Low maintenance and hardy, even in tough conditions
• Grows into a compact shrub, 3–4 feet tall and wide
• Works beautifully as a stand-alone specimen or rose hedge

Double Knock Out® Rose Uses

These edible rose petals are as practical as they are beautiful. As long as they’re chemical-free, the petals can be used to:

• Add color to teas, lemonade, or juices
• Infuse into butter, jams, or salads
• Steep for homemade rose water
• Dry for use in potpourri or crafts

And as a cut flower, Double Knock Out® Roses provide an almost endless supply of vibrant blooms for fresh floral arrangements throughout the season.

How to Grow Double Knock Out® Roses

These roses are heat- and drought-tolerant once established and are well-suited for gardeners of all experience levels.

• Sunlight: Full sun (6–8 hours daily)
• Spacing: Plant 3–4 feet apart on center for airflow and best growth
• Size at Maturity: 3–4 feet tall and wide
• Soil: Well-drained soil with moderate moisture
• Pruning: Optional; prune in early spring before buds form
• Container Friendly: Yes—just choose a pot twice the size of the original nursery container and keep it well-watered in full sun

A Rose That Delivers on Beauty and Performance

Whether you’re looking to buy Double Knock Out® Roses as a focal point, hedge, or container plant, this patented variety delivers unmatched flower power with almost no effort.

Order today and enjoy a landscape filled with vibrant red blooms on a rugged, easy-to-grow rose you can count on year after year.

This variety may be protected by USPP #16,202 or other patents and is sold under license from the patent owner.