Botanical profile

Hardy rose bush 'Double Knock Out' red

Latin name
Rosa 'Double Knock Out' (red)
Common name
Hardy rose bush 'Double Knock Out' red
Type
Flowering shrub
Family
Rosaceae

Rosa ‘Double Knock Out’, also known as the Double Knock Out Rose, is an extremely popular shrub rose recognized for its abundant blooms and remarkable disease resistance. This vigorous variety forms a dense, rounded shrub that easily integrates into flower beds, borders, and low hedges. From early summer until the first frosts, it continuously produces numerous double flowers of an intense velvety red that maintain their color well in the sun. The flowers appear in generous clusters and sometimes emit a light fragrance. Its deciduous, dark green, dense, and glossy foliage is particularly resistant to common rose diseases, which greatly reduces maintenance. Very hardy and easy to cultivate, Rosa ‘Double Knock Out’ is ideal for low-maintenance gardens while offering spectacular and long-lasting blooms.

Care guide

Growing conditions

Light, soil, water and hardiness

Hardiness zone
Zone 4
Exposure
Full sun or at least 6 hours of direct sun per day.
Watering
Very drought tolerant once established. Regular watering only the first year or during severe droughts.
Fertilization
Fertilize in spring with a rose or flowering plant fertilizer. Repeat every 4 to 6 weeks until mid-August. Do not fertilize after this time to allow the plant to fully enter dormancy.
Soil type
Rich, well-drained soil
Minimum temperature
'-34°C
Plant appearance

Blooming, foliage and shape

Blooming period
June to September
Flower color
Intense red
Fruiting
Few or no rose hips
Foliage color
Green
Foliage type
Obsolete
Shape
Rustic bush
Garden structure

Size and growth

Height
100 cm (40 inches)
Width
100 cm (3.5 feet)
Growth rate
Average
Pet friendly
Safe for pets

Pets

Pollinators
Attracts or supports pollinating insects

Pollinators

Butterflies
Plants that attract butterflies

Butterflies

The availability of our plants varies depending on arrivals, seasons, nursery production and supplier availability. Some varieties may be offered for a limited time only, depending on their natural cycle or current stock. These plant profiles are designed to guide and inspire you when choosing plants for the garden, landscaping projects, containers or long-lasting outdoor arrangements.