Knock Out Rose (Rosa 'Knock Out')

Knock Out Rose

Rosa 'Knock Out'

Its continuous blooms paint gardens in cheerful pink/red, a low-maintenance rose for busy gardeners. Deciduous flowering shrub; common name: Knock Out Rose.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun exposure for optimal continuous blooming; tolerates partial shade with reduced flower production
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Watering Water deeply when the top 5–7 cm of soil is dry; avoid overhead watering to prevent fungal leaf diseases
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Temperature Hardy to USDA zones 5–9; tolerates cold winters with mulch protection and hot summers with consistent moisture
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Characteristics

  • Leaf: Glossy dark green oval leaves with serrated margins; semi-evergreen in mild climates
  • Flower: Single to semi-double pink/red blooms (3–5 cm diameter) with yellow stamens
  • Stem: Thorny woody stems; dense branching habit
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Care Guide

Watering

Keep soil consistently moist during active growth; avoid waterlogging root zones

Fertilization

Apply balanced slow-release fertilizer once at bud break. Avoid over-fertilization to prevent excessive foliage growth at the expense of blooms

Banana peel compost tea:Compost banana peels for 2–3 weeks to break down nutrients; steep in water for 24 hours, dilute 1:20 for root drench; discard solid peels to avoid pest infestations
Pruning
  • Prune in late winter to remove dead, damaged, or crossing branches and shape the shrub
  • Deadhead spent blooms regularly to encourage continuous flowering through the growing season
  • Thin dense inner branches to improve airflow and reduce fungal disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic; minor skin irritation from thorns possible

Humans: No toxic effects from ingestion; minor skin irritation possible from thorns

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Garden Uses & Culture

Culture: Symbolizes classic rose themes of love and beauty; popular in cottage-style gardens

Usage: Ornamental garden shrub; suitable for cut flower arrangements