White Knock Out Rose (Rosa ‘Radwhite’)

White Knock Out Rose (Rosa ‘Radwhite’) is a bright, continuously blooming shrub rose prized for its crisp white flowers, vigorous growth, and exceptional disease resistance. Also known as the White Knock Out, this variety brings year-round appeal with minimal care, producing wave after wave of blooms from spring through frost on a clean, bushy plant.

Distinctive Features

This compact, rounded shrub reaches 3 to 4 feet tall and wide, with dark green foliage that contrasts beautifully with its pure white single to semi-double blooms. Each flower has a subtle yellow center and a light fragrance. Like others in the Knock Out series, it is self-cleaning and rarely troubled by black spot or mildew, making it ideal for low-maintenance landscapes.

Growing Conditions

• Sun Exposure: Full sun
• Soil Type: Well-drained garden soil or loam
• Soil pH: Slightly acidic to neutral
• Water Needs: Moderate; water deeply during dry periods
• USDA Hardiness Zones: 5 to 9

Ideal Uses

• Focal point in foundation or entryway plantings
• Massed in beds for a clean, modern aesthetic
• Low flowering hedge for borders or walkways
• Accent shrub in pollinator and cutting gardens
• Container planting on patios or rooftop gardens

Low Maintenance Care

• No deadheading needed to encourage rebloom
• Prune back in early spring to refresh shape
• Mulch to retain moisture and regulate soil temperature
• Apply a balanced fertilizer in spring and midsummer
• Space for air circulation to maintain healthy foliage

Why Choose White Knock Out Rose

• Classic white blooms with season-long interest
• Self-cleaning and continuous flowering habit
• Excellent disease resistance for easy care
• Compact, tidy form suits a variety of settings
• A clean and versatile focal point for contemporary or traditional gardens

White Knock Out Rose adds timeless beauty and dependable performance to the landscapeoffering a radiant focal point with lasting impact and very little upkeep.