Knock Out? Rose Tree - Rosa ?Radtko?

Knock Out® Rose Tree (Rosa ‘Radtko’)

The Knock Out® Rose Tree, botanically known as Rosa ‘Radtko’, is a popular flowering rose grown in an elegant tree form that delivers vibrant blooms from spring through fall. Known for its exceptional disease resistance and continuous flowering, this rose tree has become a favorite among homeowners looking for long-lasting color with minimal maintenance. Many gardeners buy Knock Out® Rose trees online because they combine the beauty of traditional roses with easier care and dependable performance.

Landscaping Uses

Knock Out® Rose trees are perfect for entryways, patios, garden beds, and decorative containers. Their upright tree form makes them ideal as accent plants or focal points in landscape designs. Homeowners often place them along walkways, beside front doors, or in decorative pots to add months of colorful blooms to outdoor spaces.

Specifications

Height: 4–7 ft
Width: 3–4 ft
Growth Rate: Fast
Sun: Full Sun
Water: Moderate; consistent watering preferred during establishment
Soil: Well-drained soil; adaptable to most garden soils
USDA Zones: 5–10

Why Homeowners Love It

• Produces vibrant blooms continuously from spring until frost
• Highly disease-resistant rose requiring minimal maintenance
• Elegant tree form adds height and structure to garden beds and containers
• Drought tolerant and adaptable to a wide range of growing conditions

Planting & Care

Knock Out® Rose trees grow best in full sun with well-drained soil. Dig a planting hole twice as wide as the root ball and plant at the same depth it was growing in the container. Water thoroughly after planting and mulch around the base to retain soil moisture and reduce weeds. Regular watering during the first growing season helps establish strong roots. Light pruning in early spring encourages fresh growth and abundant blooms throughout the growing season.