Red Double Knock Out Rose (Rosa ‘Radtko’)

Red Double Knock Out Rose

When it comes to high-performing, reliable Roses, the Knock Out® series takes the cake! The Red Double Knock Out® Rose (Rosa ‘Radtko’) is no different. This easy-to-maintain Rose bush ignites the yard with more blooms than you can count. And it’s known for its repeat performance of wave after wave of bursting red blooms from late spring until the first frost!

The red flowering Double Knock Out® Rose Shrub is more exciting than any photos online can depict. When it blooms, it comes alive with more cherry red than green. Its double blooms offer a luxurious display on a low-maintenance plant. You can pick them for a whole anniversary party, fill table centerpieces and vases all season and still have plenty left to enjoy on the plant. Much to the pleasure of your pollinators that arrive to check out your blooms. The few times you’ll see these not in bloom, you’ll still enjoy the glossy green leaves!

Enjoy flowers until autumn, and once the frost hits, you can still enjoy the Knock Out® Rose’s showy orange Rose Hips while looking forward to its attractive violet-hued fall foliage! Enjoy colorful winter décor and beautiful dried bouquets!

Double Knock Out® Rose isn’t grafted. Instead, it grows on its own roots, which gives them added resiliency in cold winter zones. No matter what winter throws at you, this Rose will grow back in the spring, looking as great as ever. Give them full sun, well-drained soil and a medium amount of water, and let them shine for you!

Rest assured, these tough Shrub Roses are disease resistant. They can handle heat and drought once established. It even thrives in humid conditions. No fuss, no muss, but lots of flowers. Hardy throughout USDA growing zones 5 to 9, there is little these resistant and resilient plants can’t handle in your yard! Knock Out® Roses have resistance to blackspot, powdery mildew, or leaf rust and also do very well in humid climates. What a wonderful plant!

Planting and Application:

The Red Double Knock Out® Rose stays compact, which makes it ideal for a wide variety of landscape uses such as foundation planting or informal hedges. It also makes a vibrant middle border or back border. Rely on their charming color and tidy, mounded form to welcome guests and boost the curb appeal of your property. Decorate your landscape with these easy-care Landscape Roses grown in the ground, or if you prefer, in containers for a dramatic profusion of color.

No property? No problem! Plant them in a pot, and use it to decorate your sun-drenched balcony, porch or patio. Just give yourself and your guests some “wiggle room” to move past it, as those thorns are no joke! Larger planters and year-round porch pots will add long-lasting blooms to your patio and even balconies! The butterflies will adore the blossoms and stop by for a visit.

Use in lower water-use gardens, as Firewise landscaping buffer zones, and watch as that hell strip lights up with color and charm! It will also make your hell strip light up with color and charm.

Add a single specimen to your cottage and perennial beds and borders, or accent your home’s front steps, mailbox, or near driveways to welcome you home! Use a pair flanking on either side of your front door, or create interest with a triangular accent as anchor planting at the corner of your home.

Imagine several of them planted together for a big impact! These plants make excellent additions to foundation plantings. Plant them two feet apart on center to create low hedges that grow together. Or, use multiple rows planted in a staggered zigzagging pattern to fill a wide, open area. You’ll appreciate how easy-care your new mass planting spectacle is when you fill large areas in profuse red blooms! Go for the gusto and mix and match with other Knock Out® Roses for a rainbow display! You will enjoy an instant style that makes everyone happy and you’ll definitely appreciate the performance!

  • Red Double Blooms Spring Through Fall
  • Mildly Fragrant Cherry-Red Rose
  • Cheerful Color Won’t Fade
  • Compact Shrub Rose & Growth Habit
  • Beautiful Dark Green Foliage
  • Easy Care & Maintenance Free Rose
  • Great Cut Flowers, Colorful Rose Hips & Fall Foliage Color

Tips for Care:

The Red Double Knock Out® Rose is best known for its drought tolerance and high resistance to blackspot and downy mildew! Just be sure to plant them in an area with good air circulation. Provide a full sun location and plant in well-drained soil that’s organically enriched and mulched well. The more sun, the more flowers! Plant in well-drained soil doesn’t stay wet for long after a rain. If you see puddles that remain, you’ll want to create a raised planting bed. For truly soggy soil, plant them in containers or create a berm.

Be sure to include a packet of Nature Hills Root Booster when planting. You’ll love the boost in performance when you get your Roses off to the best start. Follow the directions on the package. Apply 3 – 4 inches of arborist mulch to cover the root system. Apply a slow-release fertilizer for Roses in early spring and again in mid-summer, following the directions on the label.

Although they are often listed as drought tolerant, Nature Hills recommends that you provide Knock Out® Roses with a medium amount of water on a regular basis. You’ll be so pleased with how quickly they perk right up. For best results, water these regularly, or add a drip irrigation system beneath the mulch to make it easier for you.

Knock Out® Roses self-cleaning, so there is no need to deadhead spent blooms. What could be easier? These plants will stay smaller in the colder USDA Growing Zones, but if you wish to give them a trim, pruning is best done in early spring if needed. Wear gloves to protect your hands

  • Full Sun
  • Moderate Moisture Needs Once Established
  • Well-Drained Enriched Soil
  • Heat Tolerant & Cold Hardy
  • Self-Cleaning Blooms – No Deadheading
  • Low Maintenance & Disease Resistant

The Red Double Knock Out® Rose Shrub is a fan favorite that has it all!

Red Double Knock Out Rose (Rosa ‘Radtko’) Details

Common name Red Double Knock Out Rose
Botanical name Rosa 'Radtko'
Plant type Deciduous
Hardiness zone 5-10
Growth rate Medium
Harvest time Orange Rose Hips in Fall
Height 3 - 4 ft.
Width 3 - 4 ft.
Sunlight Full Sun
Moisture Medium
Soil condition Well Drained
Pollinator-friendly Yes
Pruning time Early Spring
Flower color Red