The landmark landscape shrub rose that revolutionised low-care roses, with cherry-red single blooms produced continuously. Outstanding disease resistance and self-cleaning, needing almost no spraying or deadheading.
At a glance
- Plant type: Shrub
- Mature size: 1.2 m H × 1.2 m W
- Aspect: full sun and part shade or morning sun
- Water: happy on low water
- Frost: hardy
- Maintenance: low maintenance
- Origin: Exotic
About Knock Out Rose
Rosa 'Knock Out' is a fast-growing shrub in the Rosaceae family. It reaches around 1.2 m tall and 1.2 m wide at maturity, with deciduous foliage. Red flowers appear for much of the year.
Where to grow Knock Out Rose
Knock Out Rose suits warm-temperate, cool-temperate, Mediterranean and subtropical climates and grows best in full sun and part shade or morning sun. It is frost hardy and shrugs off cold winters. It also is an award-winning selection.
Soil & planting
Knock Out Rose does best in free-draining, loamy and clay soil. Plant into well-prepared ground, firm the soil around the roots and water deeply to settle it in. For a screen, space plants about 72 cm apart.
Watering & feeding
Knock Out Rose performs well with relatively little water once established. Feed as new growth begins, following the rate on a balanced garden fertiliser. Keep a newly planted specimen evenly watered through its first season; established plants can then follow the water needs above.
Pruning & care
Prune Knock Out Rose after flowering to keep it compact and encourage the next flush of blooms. It clips well, so trim two or three times a year for a formal finish. For most gardens, it is low maintenance.
Using Knock Out Rose in the garden
Knock Out Rose earns its place for a feature or specimen planting, a fast screen or informal hedge, feeding bees and pollinators and pots and courtyard containers. It is equally at home in the ground or a large pot on a balcony or courtyard.
Companion planting & design
Knock Out Rose sits most comfortably beside plants adapted to low water use and warm-temperate climate. A small cluster gives stronger visual impact than isolated plants scattered through the garden.
Good to know
It is thorny — useful as a barrier, but wear gloves when pruning.
Buying Knock Out Rose
Plant Sale lists Knock Out Rose as potted plants and bare-root stock. Use the quote builder above to ask about current stock, sizes and pricing.
