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Rosa Knock Out® (Shrub Rose)

Rose Knock Out®, Rosa 'Radrazz' PP11836, CPBR#0993, Knock Out® Rose, Shrub Roses,

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Rose 'Knock Out®', Rosa 'Knock Out®', 'Knock Out®' Rose, Shrub Roses, Rose bushes, Garden Roses, Rosa'Radrazz', Red Roses, Red Flowers
Rose 'Knock Out®', Rosa 'Knock Out®', 'Knock Out®' Rose, Shrub Roses, Rose bushes, Garden Roses, Rosa'Radrazz', Red Roses, Red Flowers

Blooming its heart out, Rosa Knock Out® is a compact shrub rose which produces abundant clusters of single to semi-double, vibrant cherry-red flowers, up to 3.5 in. across (9 cm), adorned with up to 11 petals. The blossoms do not fade in the heat and stand out against the disease-resistant, dark purplish-green foliage. The flowers bloom continuously from spring until frost and are followed by decorative orange-red hips. The foliage turns purple to burgundy in fall. Easy to grow, low maintenance, drought tolerant, and self-cleaning, this immensely popular shrub rose is an exceptional choice for the landscape and suits every garden and lifestyle.

Rosa Knock Out® belongs to the Knock Out® shrub roses known for their compact size, long bloom season, bright colors, profuse flowering, exceptional resistance to black spot, and winter hardiness.

  • Winner of the 2000 All-America Rose Selection – the most prestigious rose award in the USA, and the Cary Award, which recognizes plants that are particularly adequate for New England, offer superior landscape appeal, are winter hardy and pest resistant.
  • Grows in a rounded, bushy, and well-behaved shrub, up to 3-4 ft. tall and wide (90-120 cm).
  • Best grown in full sun or partial sun, in rich, fertile with adequate moisture, well-drained soils. This rose is noted for its ability to bloom in as little as 3 hours per day of direct sun with excellent disease resistance.
  • An excellent choice for beds and borders where it can be planted among shrubs, annuals, and perennials. May be planted in large groups to create a colorful hedge or along a foundation to provide a bright border.
  • Total blackspot resistance makes this shrub a truly disease-free landscape rose.
  • This shrub rose does not require special care. However, for best performance, cut back every year in early spring after the last threat of frost has passed.

Requirements

Hardiness 5 - 11
Heat Zones 1 - 10
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, H1
Plant Type Roses
Plant Family Rosaceae
Genus Rosa - Shrub Rose, Rosa
Common names Rose
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)
Summer (Early, Mid, Late)
Fall
Height 3' - 4'
(90cm - 120cm)
Spread 3' - 4'
(90cm - 120cm)
Spacing 36" - 48"
(90cm - 120cm)
Maintenance Low
Water Needs Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Plant of Merit, Showy, Fruit & Berries
Attracts Butterflies
Garden Uses Beds And Borders, Hedges And Screens
Garden Styles Informal and Cottage, City and Courtyard, Traditional Garden
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Alternative Plants to Consider

Rosa rugosa ‘Alba’ (Rugosa Rose)
Rosa rugosa ‘Purple Pavement’ (Rugosa Rose)
Rosa Stormy Weather (Climbing Rose)
Rosa Enchanted Peace™ (Hybrid Tea Rose)
Rosa Pinkerbelle™ (Hybrid Tea Rose)
Rosa Sweet Spirit™ (Hybrid Tea Rose)
View All Our Rosa - Shrub Rose

Recommended Companion Plants

Nepeta ‘Six Hills Giant’ (Catmint)
Geranium ‘Rozanne’ (Cranesbill)
Alchemilla mollis (Lady’s Mantle)

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Great Rose Companion Plants: Nepeta, Salvia and Lavandula
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Combine Early-Flowering Clematis with your Climbing Roses
Pretty Roses and Clematis Combination Ideas (Part 2)
Combine Late-Flowering Clematis with your Climbing Roses
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Native Plant Alternatives to Rosa rugosa (Rugosa Rose)
Native Plant Alternatives to Rosa canina (Dog Rose)
Native Plant Alternatives to Rosa laevigata (Cherokee Rose)
Native Plant Alternatives to Rosa multiflora (Multiflora Rose)
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Best David Austin Roses for Pacific Northwest Gardens
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Pretty Rambler Roses for your Garden
Climbing or Rambler Roses for my Garden?
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Best English Roses for Hedges
Learn How To Plant And Care for Your English Roses
Plants with Purple Flowers to Add Charm to Your Garden
Plants with Pink Flowers to Add Romance to Your Garden
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 5 - 11
Heat Zones 1 - 10
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, H1
Plant Type Roses
Plant Family Rosaceae
Genus Rosa - Shrub Rose, Rosa
Common names Rose
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)
Summer (Early, Mid, Late)
Fall
Height 3' - 4'
(90cm - 120cm)
Spread 3' - 4'
(90cm - 120cm)
Spacing 36" - 48"
(90cm - 120cm)
Maintenance Low
Water Needs Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Plant of Merit, Showy, Fruit & Berries
Attracts Butterflies
Garden Uses Beds And Borders, Hedges And Screens
Garden Styles Informal and Cottage, City and Courtyard, Traditional Garden
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Rosa (Shrub Roses) Rosa (Rose)
Not sure which Rosa (Shrub Roses) to pick?
Compare Now

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    Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.

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