Red Knock Out® Shrub Rose
Rosa 'Radrazz'
- Stay Protected with Plant Sentry ™
Red Knock Out® Shrub Rose - #2 Container is backordered and will ship as soon as it is back in stock.
Plant Sentry™
Plant Sentry™
Plant Sentry is designed to protect both consumers and the nursery trade from invasive plant pests and diseases. Sites that display the Plant Sentry protection badge are protected from consumers buying and nurseries shipping material carrying invasive pests and diseases.
This proprietary eCommerce software prevents the shipment of a restricted plant to each state. The Plant Sentry system includes a shipment certification program. The Plant Sentry Compliance Officer works closely with NatureHills.com and each nursery or fulfillment center to ensure only compliant plants are sold to customers.
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Delivery and Shipping
Delivery and Shipping
Shipping
To obtain a more accurate shipment time-frame, simply enter your zip code in the “Find Your Growing Zone” box to the right. Our plants are grown all over the country and lead time on items may be different because of this. Once your order is placed, you will also receive the specific shipment time-frame information as part of your order confirmation. Once an item ships, you will receive shipment notification and tracking numbers, so you can follow along while your plant travels to your doorstep. We use FedEx, UPS, or USPS at our discretion.
Due to winter weather we have put a hold on shipping to the areas shown below in grey. You can still order now and we will ship the plant to you during an appropriate time for your zone.
Standard Shipping Rates
At Nature Hills we handle, package and ship the products you order with the utmost care to ensure healthy delivery. Shipping and handling charges are calculated based on the tables below. Please note that some items include an additional handling surcharge, these will be noted on the item's product page.
From | To | S&H |
---|---|---|
$0 | $19.99 | $24.99 |
$20 | $49.99 | $29.99 |
$50 | $69.99 | $34.99 |
$70 | $99.99 | $39.99 |
$100 | $129.99 | $44.99 |
$130 | $149.99 | $48.99 |
$150 | $150+ | Approx 28% |
Click here to see our full rates
Understanding Plant Options
Nature Hills offers plants in two main formats:
- Container Plants: Grown in pots with soil, sized by container volume and plant age
- Bare Root Plants: Dormant plants without soil, sized by height measurements
Container Plant Sizes
Container sizes indicate plant age and growing capacity rather than liquid volume equivalents. Our containers follow industry-standard nursery "trade gallon" specifications, which differ from standard liquid gallon measurements.
Young Plants (6 months to 18 months old)
Container Size | Actual Volume | Metric Equivalent |
---|---|---|
2" x 2" x 3" | 0.18 - 0.21 dry quarts | 0.20 - 0.23 dry liters |
4" Container | 0.31 - 0.87 dry quarts | 0.35 - 0.96 dry liters |
4.5" Container | 0.65 dry quarts | 0.72 dry liters |
6" Container | 1.4 dry quarts | 1.59 dry liters |
1 Quart | 1 dry quart | 1.1 dry liters |
5.5" Container | 1.89 dry quarts | 2.08 dry liters |
Established Plants (18 months to 2.5 years old)
Container Size | Actual Volume | Metric Equivalent |
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2 Quart | 2 dry quarts | 2.2 dry liters |
#1 Container | 2.26 - 3.73 dry quarts | 2.49 - 4.11 dry liters |
5" x 5" x 12" | 3.5 - 4.3 dry quarts | 3.85 - 4.74 dry liters |
Mature Plants (2-4 years old)
Container Size | Actual Volume | Metric Equivalent |
---|---|---|
#2 Container | 1.19 - 1.76 dry gallons | 5.24 - 7.75 dry liters |
#3 Container | 2.15 - 2.76 dry gallons | 8.14 - 12.16 dry liters |
Large Plants (3-5 years old)
Container Size | Actual Volume | Metric Equivalent |
---|---|---|
#5 Container | 2.92 - 4.62 dry gallons | 12.86 - 20.35 dry liters |
#6 Container | 5.25 - 6.01 dry gallons | 23.12 - 26.42 dry liters |
#7 Container | 5.98 - 6.53 dry gallons | 26.34 - 28.76 dry liters |
Bare Root Plants
Bare root plants are sold by height from the root system to the top of the plant. Plants may exceed minimum height requirements.
Common Sizes:
- Trees: 1 foot, 2 feet, 3 feet, 4 feet, 5 feet, 6 feet
- Shrubs & Perennials: 1 foot, 18 inches, 2 feet
Important Notes
Container Volume Specifications
- Trade Gallon Standard: Our containers follow industry-standard "trade gallon" specifications established by the American National Standards Institute (ANSI Z60.1) for nursery stock
- Volume Variations: Actual soil volume may vary due to plant root systems and growing medium settlement
- Age Indicators: Container size primarily indicates plant age and maturity rather than liquid volume equivalents
Growing Conditions
- Plant size can vary based on variety and growing conditions
- Container size helps indicate plant maturity and establishment level
- Larger containers generally mean more established root systems and faster landscape establishment
Seasonal Availability
- Bare root plants are available seasonally when dormant
- Container plants are available throughout the growing season
- Specific varieties may have limited availability in certain sizes
Questions?
For questions about specific plant sizes or availability, please contact our plant experts who can help you choose the right size for your landscape needs.
Plant Highlights
Red Knock Out® Shrub Rose highlights at a glance!
Specifications
Specifications
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Brand
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Botanical Name
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Growing Zones
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Mature Height
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Mature Spread
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Sun ExposureFull Sun
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Moisture
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Soil
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Growth RateMedium
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Flower Color
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Fall Color
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Pollinator Friendly
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Fragrant
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Pruning Time
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Bloom PeriodLate Spring, Summer, Fall
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Photos Provided ByStar Roses and Plants - www.starrosesandplants.com

Growing Zones 4-9
The glorious Red Knock Out® Shrub Rose (Rosa 'Radrazz') is a remarkably hardy shrub that produces amazing red Roses. One would look spectacular by your front door, or plant several along a patio or perennial bed for a long-lasting blast of color. Your Red Knock Out® Shrub Rose will be an ever-producing, long-lasting explosion of color for your yard. Once you plant this exceptional Rose variety you'll enjoy sumptuous floral brilliance every year from May until the first frost!
Every single bloom is a stunning cherry red with a diameter of up to 5 inches, and a soft, Tea Rose scent. The Roses continually bloom, but even if there's a slight pause, you'll enjoy how the new leaves begin their lives with a reddish tint, later transitioning to dark green. When autumn arrives the foliage changes once again to a deep purple shade. For winter, the orange hips will seem to pop out amid the dreary landscape like tiny ornaments amid the dark branches.
The brilliant red flowering Knock Out® Rose comes alive with more cherry red than green. Its blooms offer a luxurious display on a low-maintenance plant. You can pick them for a whole anniversary party, fill table bouquets and vases all season, and still have plenty left to enjoy on the plant. Much to the pleasure of your pollinators who arrive to check out your blooms!
It has excellent hardiness and disease resistance so doesn't always need the fungicide treatments that many other Roses do, and is generally maintenance-free. It's even drought-tolerant and only requires three hours of sunshine a day for its bloom (unlike many other Rose varieties). Hardy throughout USDA growing zones 4 through 9 and grow to a modest 2-3 feet in height, but spread a nice 3-4 feet in width!
Planting and Application:
It's that rare variety of Landscape Shrub Rose that you can plant and enjoy without a lot of fuss. The tidy spread of this long-blooming Shrub Rose makes it as perfect as a Groundcover Rose for flowering ornamental 'living mulch' between larger shrubs and as edging along pathways and the edges of garden beds.
No property? No problem! Plant them in a pot, and use Knock Out® to decorate your sun-drenched balcony or porch. 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! 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.
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 grouped accents and anchors planted at the corners of your home.
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 double and single Knock Out® Roses for a rainbow display!
Sometimes Knock Out® Roses form orange Rose Hips in the autumn and look great as winter décor and as winter interest. Birds love these showy Hips and they can be made into tea and preserves.
- Vivid Red, Long-Lasting Blossoms
- Wider Than Tall Mounds of Green Foliage
- Very Easy Care & Low Maintenance
- Award-Winning First Knock Out® Rose
- Winter Interest, Specimens, Container Accents & En Masse
#ProPlantTips for Care:
For the best performance, Roses need full sun, good air circulation, and well-drained soil. Enjoy their engaging red flowers and small green leaves for many years! Plant Shrub Roses in a location with good air circulation and provide regular, moderate moisture access. All plants enjoy a topdressing of 3-4 inches of arborist mulch. These Roses are disease-resistant to black spot and powdery mildew and also adapt to a variety of conditions.
If you wish to give them a trim, pruning is best done in early spring if needed. Read all you need about Rose pruning here, and about winterizing Roses, and un-wintering Roses inspiring in our #ProPlantTips Garden Blog!
- Full Sun
- Moderate Moisture & Well-Drained Enriched Soil
- Self-Cleaning, No Deadheading Required
- Prune Early Spring
- Widely Adaptable - Tolerates Salt for Coastal Conditions & Street Plantings
- Modern Cultivar has Excellent Disease & Deer Resistance
The Red Knock Out® Landscape Shrub Rose bush is the first of the famous line of Knock Out® Roses and a multiple award winner for its exceptional qualities so you know it will perform beautifully in your landscape as well! It's sure to be a winner with you as well! Order this groundbreaking flowering shrub at NatureHillscom today!
Knock Out® Rose Bush Frequently Asked Questions
What is the difference between a Knock Out® Rose and a Double Knock Out® Rose?
The main difference between these two varieties of Shrub Rose is that the Double obviously has double the petal count compared to the more 'wild rose' look of the original Knock Out® Roses.
Is it OK to plant Knock Out® Roses?
The Knock Out® Roses are fantastic flowering shrubs that feature ease of care, disease resistance, and fuss-free growth regardless of where you plant them in the country! Nature Hills uses Plant Sentry™ to ensure any plant material entering your area will be free and clear of any disease or pest issues that could potentially become an invasive issue.
What colors do Knock Out® Roses come in?
Knock Out® Roses come in a huge range of color options! From pink both light and dark, to reds, white, yellow and peachy apricots, you'll enjoy a vast array of hues to accent your gardens!
Do Knock Out® Roses come back every year?
Knock Out® Roses are incredible Rose shrubs that come back year after year, only getting bigger and better! Cold and heat tolerant in USDA hardiness zones 5 through 10, these are reliable and adaptable shrubs!
What Shipping Options Do You Offer?
NatureHills.com works closely with our growers and nursery professionals to ensure we ship when it is most appropriate for your area. Our goal is to deliver the hardiest plants by avoiding extreme high and low temperatures. Check out our shipping schedule for more information and to learn our wills and won'ts when it comes to shipping plants, trees and shrubs. Find your Red Knock Out® Rose bush for sale here at NatureHills.com!