Uniform mid-cherry red shade with a subtle pinkish tone. In light the colour deepens slightly. - landscape shrub rose - very weak, barely noticeable-scented rose - scent description not available
– Exceptionally healthy, disease-resistant shrub.
– Handles urban heat and drought remarkably well.
– Continuous cherry-red flowering all season.
– Dense, bushy growth ideal for low hedges.
– Award-winning, internationally acclaimed landscape rose.
– Special feature: Widely honoured, including ADR Award and WFRS Hall of Fame selection.
Expert background – Shapes and contours
pharmaROSA® ORIGINAL 2-litre own-root potted rose
21,30 £
Unfortunately, we are currently unable to ship to the United Kingdom; we only deliver to countries within the European Union. For more information, please contact us!
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KNOCK OUT® – cherry-red landscape shrub rose - Radler
Effortless cherry-red colour, reliable flowering and durable shrubs make KNOCK OUT® a go-to choice for tidy, low-input gardens, even where winds and rain demand solid anchoring and steady structure over time. Its bushy habit and naturally self-cleaning blooms keep borders looking fresh with very little deadheading, while disease-resistant foliage stays clean and presentable in typical British humidity. As an own-root rose it builds a long-lived, resilient framework that copes well with everyday family use and evolving planting schemes, giving you reassuring, low-fuss performance from planting onwards as it moves from root-building to fuller shoots and then complete ornamental impact.
Knock Out® showing its cherry-red blooms at full bloom
Semi-double, cup-shaped flowers of Knock Out®.
Usage options
Target area
Reasoning
Front garden feature shrub
This rose’s compact, bushy habit and even 90–120 cm height make it ideal for a prominent front-garden position that never looks straggly. The cherry-red blooms repeat reliably, giving a strong focal point without complicated pruning or feeding, suiting busy beginners.
Low-maintenance flower bed
Outstanding disease resistance and naturally self-cleaning flowers mean minimal spraying and almost no deadheading, yet the plant still looks freshly tended. In a simple mixed bed you gain continuous colour with very few tasks, giving confidence to time-pressed owners.
Urban and street-facing planting
Good heat and short-term drought tolerance, plus proven urban robustness, make this cultivar dependable in paved front gardens and exposed street-side beds. It copes with reflected heat and occasional neglect, fitting the needs of city householders.
Small groups in cottage-style borders
Planting 1–5 shrubs at 65–100 cm spacing creates a rounded, cohesive group that threads easily into cottage mixes. The bushy outline and repeat flowering provide structure and colour that blend with perennials, suiting style-conscious gardeners.
Informal flowering hedge
When set at about 55 cm for hedging, the consistent height and dense foliage line paths or drives with a soft but defined boundary. Repeat cherry-red blooms keep the hedge lively through the season, appealing to family homes.
Containers and large patio pots
Its moderate size and resilient root system adapt well to large containers of at least 40–50 litres with good drainage, where regular watering is easier to manage. You gain a durable, repeat-flowering patio accent suited to courtyard gardeners.
Mixed shrub groups in family gardens
As an own-root shrub it settles deeply, gradually thickening into a long-lived, balanced bush that integrates with other shrubs. This long lifespan and capacity to regenerate make it a sound investment for long-term planners.
Exposed beds in windy or coastal spots
The sturdy 90–120 cm framework and dense foliage give good stability where wind can buffet plants, helping it stand upright and hold its shape even in poor weather, supporting those gardening in areas where reliable anchoring matters to coastal residents.
Styling ideas
COTTAGE CLUSTER – Plant three shrubs in a loose triangle with sweet alyssum at the front for a soft, billowing cherry-red and white mix – ideal for cottage-style enthusiasts
URBAN RIBBON – Use a single row along a front path, underplanted with low Artemisia for silver contrast and neat structure – ideal for compact city gardens
PATIO ANCHOR – Grow one plant in a 50-litre terracotta pot with gravel mulch to highlight its tidy shape and continuous bloom – ideal for balcony and terrace users
MIXED SHRUB FRAME – Combine with cherry laurel and other evergreen shrubs, using the rose as a flowering accent within a long-lived backbone – ideal for low-maintenance planners
FAMILY-FRIENDLY BED – Arrange 5 plants in a small rectangular bed for an easy-care, season-long block of colour children can enjoy – ideal for busy family households
Technical cultivar profile
Characteristic
Data
Name and registration
Modern shrub rose, registered as RADrazz, marketed as Knock Out®; shrub/landscape type for beds and borders, verified authenticity for reliable long-term garden performance.
Origin and breeding
Bred by William J. Radler in the USA from ‘Carefree Beauty’ × ‘Razzle Dazzle’; introduced around 2000 by Conard-Pyle / Star Roses, selected for ease and resilience.
Awards and recognition
High-profile awards include AARS (2000), ADR (2002), Portland Gold Medal (2003) and WFRS Rose Hall of Fame (2018), reflecting sustained global garden reliability.
Growth and structural characteristics
Bushy, compact shrub reaching around 90–120 cm in height and spread, with dense, mid-green foliage (RHS 136A) and moderate prickles, forming a rounded, stable outline.
Flower morphology
Semi-double, cup-shaped flowers with 13–25 petals, borne in clusters, large-flowered size range, and remontant blooming with a generous repeat later in the season.
Colour data and phenology
Cherry-red blooms (RHS 53B–53C) with a subtle pinkish tone; colour may lighten in strong sun but remains vivid in cooler spells, maintaining a consistent red display.
Fragrance and aroma
Fragrance is very weak and barely noticeable, making it suitable where strong scent is not required; open-centred flowers still offer visual and pollinator appeal.
Hip characteristics
Rose-hip set is usually sparse due to strong self-cleaning; occasional small, spherical orange-red hips 7–11 mm in diameter may form late in the season.
Resistance and winter hardiness
Very good resistance to black spot, powdery mildew and rust, with hardiness to about −32 to −29 °C (H7, USDA 4b), ensuring reliable performance in cold, damp winters.
Horticultural recommendations
Plant 55–100 cm apart depending on use; prefers well-drained soil, tolerates partial shade and short droughts; minimal pruning and feeding needed for strong repeat flowering.
KNOCK OUT® offers easy-care cherry-red flowering, strong disease resistance and a long-lived own-root framework that settles securely into family gardens, making it a sound, low-effort choice to consider for your next planting.
Competition and Show Awards:
All-America Rose Selections (AARS) winner (2000); Germany – ADR Award (2002); Portland Gold Medal (2003); American Rose Society David Fuerstenberg Prize (2003); ARS Members
Pollinator Attraction:
Its single, open-centred flowers with easily accessible stamens attract bees, as the simple flower form and exposed stamens improve pollinator access.
Pollinator-Friendly Rating:
Semi-double, open-centred flowers with easily accessible stamens that attract bees well, therefore moderately pollinator-friendly.
Hip Comment:
Rose-hip formation is generally scarce due to strong self-cleaning; occasionally a spherical, orange-red rose hip 7–11 mm in diameter is produced.
Our product is a rose grown with pharmaROSA®’s unique cultivation technology!
2-litre, own-root, potted rose.
With a shoot system appropriate to the season.
With a root system that thoroughly permeates the growing medium.
Quality compliant with the requirements of the E.N.A. (European Nurserystock Association).
Supplied in unique packaging that prevents damage.
Can be planted during frost-free periods.
True-to-variety rose bush with a unique identifier.
The pharmaROSA® own-root potted rose is a well-rooted plant that supports reliable establishment when planted and cared for properly, so it can be planted whenever the soil is not frozen.
Crop overview: several varieties and growth stages in a short crop section.Shoot system: intensive growth of fresh basal shoots on a young plant.Root system: demonstration of a vigorous root system permeating the growing medium, by removing the pot.Balance: mature plant with root system and shoots in harmony with each other.
Information about the videos
The video series is not a “seasonal showcase”; it illustrates the essence of pharmaROSA® own-root cultivation in a tangible way: how the plant is built up, what the root system is like and how the shoot system regenerates. The recordings were therefore made at different times and with plants at various stages of development, so mixed foliage levels and differing stages of growth may appear in the videos. They are not a ‘sample’ of the batch dispatched, but a visual explanation of how the technology works. The current condition of the rose available to order — typical for the given period and similar to what you can expect to receive in the parcel — is shown in the upper part of the product page.
Pages for private customers Garden roses for the family garden, with minimal care → ORIGINAL® Premium garden roses – instant impact, a truly showpiece garden → EXTRA® Pages for professionals and private customers Roses for public spaces – large areas, sustainable maintenance → NATURAL® Roses for projects – hedge and row planting, fast implementation → RAPID® For professional partners only Production – propagation material for garden roses, wholesale → NEONATAL®
Company details
PharmaRosa Ltd. Company registration number: 01-09-717479 VAT number: 13075314-2-43 Plant health registration no.: HU130721 Bank account (IBAN): HU85117631891388688400000000 BIC (SWIFT): OTPVHUHB Bank name: OTP Bank Nyrt.
