shrub

Radral Coral Knock Out Rose

Rosa 'Radral'

The Story

Plant Bio

The Knock Out series of roses revolutionized low-maintenance gardening with their exceptional disease resistance, continuous blooming, and overall toughness in the landscape.

'Radral' stands out with its unique brick orange to coral-colored single flowers that fade to pink as they age. It maintains the same black spot resistance and continuous bloom cycle as the rest of the series.

Uses & Benefits:

The Coral Knock Out Rose provides a stunning and unusual color in the landscape, with flowers that shift from vibrant coral-orange to pink. It blooms prolifically from spring until the first hard frost, offering unparalleled seasonal interest.

Like its siblings, it is exceptionally low-maintenance for a rose, requiring no deadheading and minimal spraying due to its high disease resistance. It's a reliable choice for adding color to sunny, difficult spots.

The open, single-petal flowers are easily accessible to bees and other pollinators, making it a more wildlife-friendly choice than many heavily-petaled modern roses.

Essentials

At a Glance

Plant Type

Shrub

Height

54 inches

Width

54 inches

Light

Full Sun

Zones

5, 6, 7, 8, 9, 10

Water

Moderate

Humidity

Tolerant of high humidity

Lifespan

10-15 years

Native To

Cultivated hybrid

Toxicity

Non-toxic, but thorny

Bloom period

Late spring – Mid-fall

In flower about 6 months of the year

Planting

How to Grow

Plant in a location receiving at least six hours of direct sun daily.
Ensure the soil is well-drained and enriched with organic matter.
Dig a hole twice as wide as the plant's container.
Set the plant in the hole so the bud union is slightly above the soil line.
Backfill with soil, water thoroughly to settle.
Mulch around the base, keeping it away from the canes.

Pro Tip

Don't be shy with pruning; a hard prune in late winter results in a fuller shrub with more flowers.

Keep It Thriving

Care Guide

Do

Provide consistent water, especially in the first year and during dry spells.
Water the soil, not the leaves, to minimize disease risk.
Prune annually in late winter for best shape and performance.
Ensure good air circulation around the plant.

Don't

Don't plant in shade; it will result in poor flowering and more disease.
Avoid overhead watering late in the day.
Don't worry about deadheading; it's self-cleaning.
Don't plant too close together; allow space for air to move.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Mulch
Pest Check
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Vibrant mass planting for bold colorContinuous blooming specimen shrubCarefree hedge or property border

Companion Plants

Perovskia atriplicifolia Geranium 'Rozanne'Calamintha nepeta 'White Cloud'Stachys byzantina Nepeta x faassenii

Multiply

Propagation Methods

Good to Know

Common Questions

Radral Coral Knock Out Rose questions

What zones can Radral Coral Knock Out Rose grow in?

Radral Coral Knock Out Rose is hardy in USDA Zones 5–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Radral Coral Knock Out Rose deer resistant?

Not reliably. Deer may browse Radral Coral Knock Out Rose, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Radral Coral Knock Out Rose bloom?

Radral Coral Knock Out Rose typically blooms in late spring through mid-fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Radral Coral Knock Out Rose need full sun?

Radral Coral Knock Out Rose does best in full sun (6+ hours).