Knock Out® roses (Rosa 'Radrazz' and variants) are exceptionally disease-resistant, low-maintenance shrub roses known for continuous blooming from spring through hard frost, with no need for deadheading. Ideal for beginners and landscaping, they thrive in full sun (but tolerate partial shade) and typically grow 3–4 ft tall and wide in zones 5–11. 
Key Aspects of Knock Out Roses
Disease & Pest Resistance: Highly resistant to black spot, the disease that frequently plagues other roses.
Self-Cleaning: Flowers drop on their own, removing the need for deadheading.
Bloom Cycle: Produces abundant, continuous blooms from spring until the first hard frost, typically every 5–6 weeks.
Maintenance: Easy to grow; requires minimal care but benefits from annual pruning in early spring to maintain size and shape.
Varieties & Colors: Available in numerous colors, including the original cherry red, hot pink, sunny yellow, and white, with some, like the 'Sunny' or 'White' varieties, offering a light fragrance.
Uses: Perfect for hedges, borders, container gardening, or as a focal point in a mixed garden.