Red Knock Out Rose

Light Needs

Full Sun

(At Least 6 Hours Of Direct Sunlight)

Mature Height

4-5 Feet

Mature Spread

4-5 Feet

Growing Zones

5 to 11

Red Knock Out Rose (Rosa ‘Radrazz’) is the original award-winning Knock Out variety that revolutionized rose gardening. Known for its continuous flush of vibrant red blooms from spring until frost, this shrub rose provides non-stop color throughout the growing season. New foliage emerges with a reddish tint before maturing to deep green, then transitions to a rich purple hue in fall, adding multi-season interest.

Unlike traditional roses, the Red Knock Out Rose is nearly maintenance-free, with excellent resistance to black spot and other common rose diseases. Its long bloom season, easy care, and outstanding garden performance make it one of the most rewarding roses for both new and experienced gardeners. Perfect for accents, foundations, borders, or mass plantings, this rose brings dependable beauty and resilience to any landscape.

Red Knock Out Rose Care

Plant in well-drained soil and water deeply during establishment. Once established, water as needed when the soil becomes dry. Mulching around the base helps retain moisture and suppress weeds. Deadheading spent flowers encourages repeat blooms, while annual pruning in late winter or early spring maintains a tidy shape and promotes healthy new growth.

Red Knock Out Rose Growth & Spacing

This rose typically grows 3–4 feet tall and wide with a rounded, bushy form. For shrub borders or mass plantings, space plants 5–6 feet apart on center.

Why Grow Red Knock Out Rose?

• Continuous color – bright red blooms from spring to frost

• Low maintenance – disease-resistant and easy to grow

• Seasonal interest – attractive foliage in spring, summer, and fall

• Versatile uses – excellent for borders, foundations, or group plantings

If you’re searching for a hardy, long-blooming shrub rose that thrives with minimal care, the Red Knock Out Rose is a garden favorite you can rely on year after year.