Shrubs

Hardy rose bush 'Double Knock Out' red

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Hardiness Zone 4

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Hardy rose bush 'Double Knock Out' red

FamilyRosaceae

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.

Hardy rose bush 'Double Knock Out' red

Soil and care

The rightconditions.

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.

Bloom and dimensions

The completeprofile.

Bloom periodJune to September
Flower colorIntense red
Foliage colorGreen
Foliage typeObsolete
FruitingFew or no rose hips
Maximum height100 cm (40 inches)
Maximum width100 cm (3.5 feet)
Growth rateAverage
Hardiness zoneZone 4
Minimum temperature'-34°C