Overview
Uses: Foundation plantings, borders, mass plantings, low hedges, containers.
Benefits: Bright yellow blooms that soften to a creamy finish, with a long season of color and a naturally tidy habit. Bred for strong disease resistance and reliable repeat bloom with minimal fuss.
USDA Hardiness Zones: 4–11
Sun: Full Sun
Life Cycle: Deciduous Shrub
Growth Habit: Mounding, Rounded — dense branching with a full canopy.
Bloom Color: Yellow to Cream
Mature Height: 3–4 feet
Mature Width: 3–5 feet
Bloom Season: Summer to Frost
Growth Rate: Moderate
Summary
Sunny Knock Out® brings the cheerful look of classic roses without the classic rose workload.
From early summer through frost, this shrub rose produces wave after wave of bright yellow flowers that mature to a softer, creamy tone as they age. The plant keeps a naturally full, mounded form that looks polished in the landscape, making it an easy fit for borders, foundation beds, and repeating drifts of color.
Sunny Knock Out® is especially valued for dependable performance and strong resistance to common rose issues, so it stays attractive with simple, straightforward care. It’s a great choice when you want long-blooming color that still feels clean and refined in a mixed planting.
Care
Sunny Knock Out® Rose Care
Plant in full sun for the best bloom production and the fullest habit.
Choose well-drained soil and avoid consistently soggy sites. If your soil is heavy, amend planting areas to improve drainage.
Water regularly during establishment. Once established, water deeply during extended dry periods, especially in summer heat.
In early spring, apply a balanced slow release fertilizer to support strong growth and consistent flowering.
Prune in late winter or early spring before new growth begins. A light shaping prune helps maintain size and encourages fresh, vigorous flowering stems.
Size
What Size is the Sunny Knock Out® Rose for Sale Online?
Plants ship in a greenhouse-grade grow pot and are actively growing at the time of shipment. Size will vary slightly depending on the season and current growth stage. If you have specific sizing questions, please contact us.
How Large Does Sunny Knock Out® Rose Grow?
At maturity, Sunny Knock Out® typically reaches about 3–4 feet tall and 3–5 feet wide, forming a rounded, mounded shrub that fills in beautifully over time.
Additional Information
What is the botanical name of Sunny Knock Out® Rose?
The botanical name is Rosa ‘Radsunny’. Sunny Knock Out® is the trademarked name for this cultivar.
What are some common names for this plant?
This plant is commonly called a shrub rose.
Does Sunny Knock Out® need deadheading to keep blooming?
Sunny Knock Out® is known for repeat flowering without the need for frequent deadheading. Removing spent blooms can keep the plant looking extra tidy, but it isn’t required for continued bloom.
Where does Sunny Knock Out® perform best in the landscape?
It performs best in sunny beds with good airflow and well-drained soil. For similar options, browse our Roses collection or explore more easy-care shrubs in Shrubs & Bushes.
