Images Depict Mature Plants
Orange Glow Knock Out Rose
Rosa 'Radslam' PP 35,826
If you want a rose that looks like you work harder than you actually do, the Orange Glow Knock Out Rose is it. The color is warm and bright, the blooms keep coming from spring to frost, and the plant behaves like a reliable landscape shrub instead of a high-maintenance rose project. Give it sun, water it deeply while it settles in, and do a simple spring prune, and you will get months of glowing orange flowers without the drama.
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Orange Glow Knock Out Rose for Nonstop Orange Blooms and Easy Color
Glowing Orange Flowers That Keep Coming From Spring To Frost
Orange Glow Knock Out Rose was made for gardeners who want a big, bright show without babysitting a finicky rose. The blooms glow in warm orange tones with soft yellow and pink undertones, and the plant keeps pushing fresh flowers again and again from spring through frost. It’s the kind of color that reads from the street, lights up a foundation bed, and makes a plain corner look intentional overnight. If you’ve ever wished you could “set it and forget it” with roses, this is exactly the vibe.
The best part is how consistent it is. You do not have to time a short bloom window or worry about a one-and-done flush. With the right sun and basic watering while it establishes, this shrub rose keeps color moving all season. It also mixes beautifully with perennials and shrubs because the flowers sit on a tidy, bushy plant instead of sprawling all over the place. Plant it as a single focal point, repeat it for rhythm, or mass it for that bold, resort-style punch of color.
A Tough, Low-Maintenance Knock Out That Stays Full And Reliable
Knock Out roses earned their reputation for a reason, and Orange Glow brings that same “easy rose” energy with a fresh color twist. It’s known for strong disease resistance compared to many traditional roses, which is a big deal if you’ve battled black spot or powdery mildew in humid summers. The foliage stays attractive, the plant keeps a dense habit, and you can enjoy roses without committing to a spray schedule or constant fussing. In short, it’s built for real-life yards and real-life routines.
This variety is also commonly sold on its own roots, which is a confidence boost for homeowners. If winter knocks it back, you’re not dealing with a grafted plant trying to re-sprout from below the graft. You’ll still get that dependable structure and performance year after year with simple care: sun, decent drainage, a mulch ring, and occasional feeding. If you want a rose that performs like a landscape shrub (not a high-maintenance diva), Orange Glow is a smart, stress-free pick.
The Right Size For Hedges, Borders, And “Color By The Foot” Planting
Orange Glow Knock Out Rose hits that sweet spot in size: big enough to make an impact, compact enough to stay manageable. Expect a mature shrub about 4 to 4.5 feet tall and 3 feet wide, with a bushy, upright habit. That makes it perfect for foundation lines, mixed borders, mailbox plantings, and sunny beds where you want color and structure in one plant. It also works brilliantly as a low privacy screen in a tight space, especially when planted in a repeating line.
If you’re thinking “hedge,” think in measurements. Spacing at about 30–36 inches on center creates a fuller, continuous row while still leaving enough airflow to keep foliage healthier. For individual specimens, give it more breathing room so the natural rounded shape shows off and the blooms read from every angle. This is also a great rose for massing—plant three or five in a group, and you get a color block that looks professionally designed, even if the rest of the bed is simple.
Simple Sun, Water, And Pruning For Maximum Bloom Power
For the most flowers and the strongest color, give the Orange Glow Knock Out Rose full sun—aim for at least 6 hours a day. It can tolerate some light shade, but more sun usually means more blooms and a tighter, denser plant. Soil should drain well, and a consistent watering rhythm during the first growing season is the single best way to set it up for long-term success. Deep watering at the base is better than frequent sprinkling, and mulch helps keep roots cool and moisture more even.
Pruning is refreshingly straightforward. Do your main cutback in late winter or early spring before growth takes off, shaping the shrub and removing any dead or crossing stems. Many gardeners cut it back by about one-third to keep the plant compact and loaded with fresh flowering wood. During the season, you can lightly tidy for shape, and while Knock Out roses often “self-clean,” a quick snip of spent blooms can keep things extra neat and encourage faster rebloom. The result is simple: a rose that stays full, blooms hard, and doesn’t demand your weekends.
| Hardiness Zone: | 4-11 |
|---|---|
| Mature Height: | 3.5 to 4.5 Feet |
| Mature Width: | 3 Feet |
| Sunlight: | Full sun (best); tolerates light part shade |
| Bloom Time / Color: | Spring to frost; orange with yellow and pink undertones |
| Soil Condition: | Well-drained; adaptable with consistent establishment moisture |
| Water Requirements: | Medium; deep weekly watering first season, then during dry spells |
| Wildlife Value | Attracts bees and pollinators during bloom |
| Resistance | Excellent disease resistance; heat tolerant; moderate drought tolerance once established |
| Landscape Uses | Foundation beds, borders, hedges, mass plantings, containers, sunny focal points |
How to Care for Orange Glow Knock Out Rose
Be sure to read our planting instructions to ensure a healthy and happy Orange Glow Knock-Out Rose for years to come!
How should I plant Orange Glow Knock Out Rose?
Plant Orange Glow Knock Out Rose in a full-sun spot with well-drained soil. Dig a hole 2–3x wider than the root ball and no deeper than the root ball, then set the plant so the top of the root ball is level with (or slightly above) the surrounding soil. Backfill with native soil, firm gently, and water deeply to settle everything in. Finish with a 2–3 inch mulch ring, keeping mulch a few inches away from the stems. If you are planting a row, stake a straight line and keep spacing consistent for a cleaner hedge later. Good drainage, correct planting depth, and a wide mulch ring are the three simplest steps that make Knock Out roses establish faster and bloom harder.
How often should I water Orange Glow Knock Out Rose after planting?
Water deeply right after planting, then continue with a deep soak about once per week during the first growing season. In hot or dry stretches, increase to twice per week. The goal is to wet the root zone thoroughly so roots grow outward, not to keep the surface constantly damp. After the first season, water is needed during extended dry spells, especially in summer heat or windy sites. Mature shrubs handle short dry periods better, but consistent moisture improves flowering and leaf quality. Always water at the base rather than overhead to keep foliage drier and reduce disease pressure.
When should I fertilize Orange Glow Knock Out Rose?
Fertilize in early spring as new growth starts using a slow-release rose fertilizer or a balanced, slow-release feeding at label rates. This supports strong spring growth and sets the plant up for heavy flowering. Water in well after feeding to move nutrients into the root zone. You can give a light follow-up feeding in early summer if growth is strong and you want to support continued bloom, but avoid heavy late-season fertilizing. Late feeding can push tender growth that does not harden off before cold weather. If the plant looks weak or pale year after year, a soil test is often more helpful than adding more fertilizer.
When and how should I prune Orange Glow Knock Out Rose?
Do your main pruning in late winter or early spring before the shrub leafs out. Remove dead or damaged stems, thin out crossing branches, and shape the plant so light and air can move through the center. Many gardeners cut the shrub back by about one-third to encourage fresh flowering wood and a compact, full habit. During the growing season, you can lightly trim for shape and remove spent blooms if you want a tidier look and faster rebloom. Avoid heavy pruning late in fall, since that can trigger soft new growth right before winter. Clean tools and simple, consistent pruning keep the shrub dense, healthy, and flower-heavy.
