How to Grow Double Pink Knock Out
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Double Pink Knock Out
Rosa 'Double Pink Knock Out'
shrubDouble Pink Knock Out is a modern shrub rose renowned for its prolific double pink flowers and exceptional disease resistance. It blooms continuously from spring through fall with minimal maintenance, making it one of the most reliable landscape roses available. The plant grows as a compact, mounded shrub with glossy foliage and excellent landscape performance.
When should you plant Double Pink Knock Out in your zone?
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Example Double Pink Knock Out timeline · Pittsburgh, PA (Zone 6b)
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Plant Double Pink Knock Out
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Double Pink Knock Out
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Double Pink Knock Out dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-9; hardy to zone 4b with winter protection
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Establishment
4-8 weeksNewly planted shrub with initial leaf growth and root development. May appear stressed initially.
Water consistently 2-3 times weekly. Apply 2-3 inches of mulch around base (not touching stem). Avoid fertilizing first 4-6 weeks. Prune off any broken canes.
Vegetative Growth
8-12 weeksVigorous shoot development with glossy green foliage. Plant establishes bushy, mounded form.
Continue regular watering. Begin fertilizing monthly with balanced rose fertilizer once established. Deadhead spent flowers to encourage bushiness. Remove any diseased foliage.
Flowering
Spring through fall (May-October in cooler zones)Abundant clusters of double pink flowers (typically 1.5-2 inches) appear in waves. Blooms continuously with proper care.
Deadhead spent blooms regularly to maintain continuous flowering. Water at soil level only. Apply rose fertilizer every 4-6 weeks during growing season. Watch for spider mites in hot weather.
Peak Summer Bloom
6-8 weeks (July-August)Maximum flower production during warm months; plant may be covered in pink double flowers.
Increase watering frequency in heat. Maintain regular deadheading. Apply 1-2 inches of organic mulch to keep roots cool. Monitor for powdery mildew in humid conditions.
Fall & Dormancy
8-12 weeks (September-November)Flowering continues through fall. Plant gradually slows as temperatures cool; foliage may yellow before leaf drop.
Stop deadheading in late fall to allow hips to form (signals dormancy). Reduce fertilizing. Prune in early spring. In cold zones, mulch around base after ground freezes.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity and water leaves in early morning. Use neem oil or insecticidal soap. Strong water spray from hose can dislodge mites.
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Spray with strong water stream. Use insecticidal soap or neem oil. Encourage beneficial insects like ladybugs.
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Hand-pick beetles in early morning. Use Japanese beetle traps placed away from roses. Apply neem oil or spinosad.
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Ensure good air circulation. Avoid overhead watering. Apply sulfur or baking soda spray. Remove affected leaves. This variety is quite resistant.
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Remove infected leaves promptly. Water at soil level only. Apply fungicide if necessary. This variety has excellent resistance.
Uses
Landscape & Ornamental Use
HouseholdDouble Pink Knock Out is exceptional as a landscape specimen for borders, mass plantings, foundation plantings, and mixed beds. Its continuous flowering, disease resistance, and minimal maintenance make it ideal for public gardens, commercial landscapes, and residential properties. [source]
Cut Flower Arrangements
CraftThe double pink flowers can be cut for fresh arrangements, though they're primarily grown as landscape specimens. The long stems allow for attractive bouquets when cut in early morning. [source]
Pollinator Garden Support
WildlifeThe abundant double flowers attract bees, butterflies, and other pollinators throughout the growing season. The continuous blooming provides excellent nectar sources. [source]
Rose Hips & Tea
MedicinalIf allowed to develop seed hips in fall, the rose produces edible hips rich in vitamin C that can be dried for tea. Traditional herbal medicine uses rose hips for immune support. [source]
Edible Petals
CulinaryThe pesticide-free petals (if grown without chemicals) can be used to garnish desserts, crystallize for cake decoration, or infuse in syrups and honeys. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Deadhead spent flowers regularly by cutting just above the first 5-leaflet leaf to encourage continuous blooming. Cut flowers are not typically harvested but can be cut for arrangements in early morning when stems are turgid. Leave some flowers on plant in late fall to signal dormancy.
Fun Facts
- 🌱 Double Pink Knock Out was bred from the original Knock Out rose (released in 1999) and introduced in 2005. It inherited the parent's legendary disease resistance and continuous blooming but with fully double pink flowers.
- 🌱 The 'Knock Out' series was specifically bred to eliminate the need for chemical fungicides and frequent pruning—a major breakthrough in rose breeding for low-maintenance landscapes.
- 🌱 Each flower cluster contains 5-15 blooms that open in succession, providing weeks of continuous color from a single flowering cycle.
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