Images Depict Mature Plants
Coral Knock Out® Rose
Rosa 'Radral' PP19803
If you want a rose that looks like you hired a landscaper—but you still want your weekends back—Coral Knock Out® is one of my favorites. The coral-orange blooms keep coming from spring to frost, the shrub stays a friendly size for borders and hedges, and it’s built to hold up with simple sun-and-water basics. Give it full sun, water at the base, and do one good prune in late winter, and you’ll get months of bright color without the rose drama.
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Coral Knock Out® Rose for Coral-Orange Color, Easy Care, and Season-Long Blooms
Coral-Orange Blooms That Stay Vivid Through Heat
Coral Knock Out® Rose brings a warm, brick-orange to vivid coral flower color that looks especially rich in hot, humid summer weather. You’ll often see a multitone effect as new blooms open brighter and older blooms soften—giving the plant more depth than a “flat” single-color shrub. In the landscape, that coral tone pops against deep green evergreens, dark mulch, and bold-leaf perennials, and it pairs beautifully with purples, blues, and silvery foliage.
The flowers show up generously and keep coming, so you get that “always in bloom” look that makes Knock Out® roses so popular. If you want a rose that reads from the street and still looks charming up close, Coral Knock Out® hits the sweet spot: bright color, tidy form, and a long season of bloom without the high-maintenance reputation older roses sometimes carry.
Nonstop Blooming For Borders, Beds, And Bright Walkways
This is a rose built for everyday landscapes. Coral Knock Out® blooms from spring through frost in repeated waves, which makes it a dependable anchor for front-yard beds, foundation plantings, and sunny borders that need steady color. It’s also a favorite along walkways—where the cheerful coral-orange blooms create a welcoming “hello” every time you come home.
Deadheading isn’t required to keep it blooming, which is a big win for busy gardeners. If you enjoy tidying, a quick snip of spent clusters can help keep the plant looking extra polished, but the real value is how well it performs even when you simply water, mulch, and let it do its thing. Think of it as the rose that behaves like a flowering shrub—reliable, repeatable, and easy to design with.
A Compact Shrub Rose That Makes A Perfect Flowering Hedge
Coral Knock Out® Rose typically matures around 3–4 feet tall and about 3–4 feet wide, giving you a full, rounded shrub that fits into beds without swallowing the space. That medium size is ideal for repeating in a border or massing in groups for a bigger color impact. Plant three to five in a drift and you get a bold coral “block” that looks intentional from day one and gets even better as it fills in.
It’s also a standout hedge rose. A row of Coral Knock Out® creates a soft, flowering boundary that feels friendlier than a strict evergreen line—and it blooms for months. Use it to edge a driveway, frame a patio, or define the front of a property. Because it stays in a manageable size range, pruning and shaping are straightforward, even for first-time rose growers.
Cleaner Foliage With Disease Resistance And Simple Basics
Knock Out® roses are loved for strong disease resistance, and Coral Knock Out® is no exception—especially when you give it full sun and good airflow. Water at the base (not overhead), and you’ll help foliage dry faster and stay cleaner through the season. New growth often has a bronze-red tone before maturing to rich green, which adds extra interest even when the plant is between flushes.
The care routine is refreshingly simple: consistent moisture while it establishes, mulch to stabilize soil moisture (kept off the base), and a once-a-year prune to encourage vigorous new flowering growth. Add a spring feeding if you want maximum bloom power, and you’ve got a rose that looks “professionally landscaped” with a homeowner-friendly level of effort.
| Hardiness Zone: | 5-11 |
|---|---|
| Mature Height: | 3 to 4 Feet |
| Mature Width: | 3 to 4 Feet |
| Sunlight: | Full sun (best); tolerates light partial sun |
| Bloom Time / Color | Spring to frost; brick orange to vivid coral |
| Soil Condition: | Well-drained soil; adapts well with compost at planting |
| Water Requirements: | Medium; deep water to establish, then water during dry spells |
| Wildlife Value | Blooms attract bees and beneficial pollinators |
| Resistance | Strong disease resistance; not reliably deer resistant; moderate drought tolerance once established |
| Landscape Uses | Borders, mass plantings, foundation beds, flowering hedge, walkway edging, containers |
How to Care for Coral Knock Out® Rose
Be sure to read our planting instructions to ensure a healthy and happy Coral Knock-Out Rose for years to come!
How should I plant Coral Knock Out® Rose?
Plant Coral Knock Out® Rose in full sun in well-drained soil. Dig a hole about twice as wide as the root ball and set the plant so the top of the root ball sits level with the surrounding soil. Backfill with native soil, water deeply to settle, and create a shallow watering ring to guide water into the root zone. Mulch 2–3 inches over the root area to conserve moisture and reduce weeds, keeping mulch a few inches away from the base of the plant. If your soil drains slowly, plant slightly high or improve drainage before planting. A sunny, well-drained start is the fastest path to heavier bloom cycles and cleaner foliage.
How often should I water Coral Knock Out® Rose after planting?
Water deeply right after planting, then keep the root zone evenly moist (not soggy) for the first several weeks. A good baseline is a deep soak about once per week, increasing to twice per week during hot weather, sandy soil, or windy conditions. After it’s established, water during extended dry spells and during heavy bloom periods for best performance. Water at the base rather than overhead so foliage stays drier. Deep, less-frequent watering encourages stronger roots and better heat resilience.
When should I fertilize Coral Knock Out® Rose?
Fertilize in early spring as new growth begins using a rose fertilizer or balanced slow-release fertilizer. Apply it over the root zone (not against the stems) and water afterward so nutrients move into the soil where feeder roots can absorb them. If you want extra bloom power, feed again after the first major flush of blooms. Avoid heavy late-season fertilizing, which can push tender growth when the plant should be slowing down. Consistent, moderate feeding supports better bloom cycles and sturdier branching.
When and how should I prune Coral Knock Out® Rose?
Prune Coral Knock Out® Rose in late winter or early spring before active growth begins. Remove dead or damaged stems first, then cut the plant back to a healthy framework to refresh shape and encourage vigorous new flowering growth. During the season, you can lightly trim straggly growth to keep the shrub tidy, but avoid heavy pruning in extreme heat. Deadheading isn’t required, though a quick cleanup of spent clusters can keep it looking extra polished. A simple yearly prune is usually all it needs to stay dense and bloom-packed.
