White Knock Out® Rose

As low as $79.19 was $119.99
Availability: In stock

Elegant, Totally Modern White Knock Out Rose

  • Pure White Blooms
  • Single Blooms Feature 5 Petals, Perfect for Butterflies
  • Very Dark, Nearly Black Foliage
  • Long Bloom Season Spring Through Fall
  • Light Citrus Fragrance
  • Low Maintenance
  • Disease Resistant Modern Landscape Shrub Rose
  • Versatile and Abundant
  • Heat Tolerant
  • Cold Hardy
  • Easy to Grow

Whether you are an experienced gardeneror a total newbieWhite Knock Out (Rosa 'Radwhite' PP20,273) is an excellent choice for a flowering shrub. It works effortlessly to create a showy standout feature in your landscape.

You'll appreciate the endless waves of pristine, snowy white, single blooms from late spring until frost. The deliciously dark green foliage offsets the white flowers to perfection.

The crisp, classic contrasting color combination is a wonderful way to create the "bones" of your garden design. Rely on these easy-care, high-impact landscape shrub Roses for a very sophisticated look.

Nature Hills works with professional garden designers every week. They rely on our pro-grade plant materials to pull off their magical designs, and you can, too.

White Knock Out Roses are tough as nails. Give them full sun, well-drained soil and a medium amount of water and let them shine for you.

You'll have classy white flowers blooming for you starting in late spring and reblooming all the way through fall. Don't forget to include lavish sprays in your cut flower arrangements!

Disease resistant, dark green foliage should be included in those bouquets. They make the entire composition "pop".

Each flower emits a delicate citrus fragrance. Use these in high traffic areas where you'll enjoy the clean scent.

Best of all? This versatile and beautiful selection is also incredibly easy to care for. After all, it's a Knock Out, world-renowned for its ease of maintenance and solid performance. Once established, you'll love how vigorous it is.

White Knock Outs is a hardy, magnificent, superior quality modern Rose. Please don't miss out, order enough to complete your project today!

How to Use White Knock Out Rose in the Landscape

This versatile selection can be used as a partner plant for bolder colors, or on its own as an ultra-modern feature plant. You'll delight in a beautiful season filled with a dynamic contrast between pure white blossoms and deep green foliage.

Plant them in containers, or use them in the ground. Either way, you'll appreciate the performance.

For effortless style, plant a row of them on the sunny side of larger, purple-foliage shrubs such as Diabolo Ninebark, Purple Sandleaf Cherry, Black Diamond Crape Myrtles or Tuxedo Weigela. With the brilliant white flowers against all that relaxing, lush foliage, your yard will showcase that designer touch.

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.

Measure from the center of one to the center of the next. Nothing could be easier than a mass planting of White Knock Out Roses.

Line wide beds along your front walkway, or try a pair flanking either side of your front door. Create a low hedge along the length of your patio garden beds, and add them to mixed shrub borders.

This calm backdrop can handle a "lot of look". It's neutral, but never drab or flat.

Elevate them in special, glazed containers of any color you like. Have fun using different bold colors each season to accessorize your space.

Try black and white accessories on your backyard conversation seating for chic, little get-togethers. Or, brighten this Rose with easy accessories, such as hot pink pillows on your seating.

Use plants to add warmth. Underplant this Rose with a low-growing, red groundcover like Dragon's Blood Sedum.

Need a restful year? Try this Rose in cobalt blue glazed pots. It would be absolutely breathtaking.

Want to amp up the energy? Splash out on bright yellow glazed pots for a very fresh look.

Rely on them in sunny spots throughout your landscape. Create pretty low hedges, or use as a focal point in your foundation or mixed border. You simply can't go wrong with these.

#ProPlantTips for Care

Easy-care, low maintenance and forgiving, Knock Out Rose bushes must have at least 6 hours or more of full sun each day. They will be perfectly happy baking all day long in the blazing hot sun.

They need well-drained soil that won't retain water for long. If you have poorly drained soil, plant them in containers or create a raised planting bed.

We always recommend Nature Hills Root Booster when planting to get your Roses off to the best start. Follow the directions on the package.

Often listed as drought tolerant, Nature Hills recommends you provide Knock Out Roses a medium amount of water on a regular basis. Water deeply in times of extreme drought. Please, protect your investment!

Water container-grown Roses regularly, using a drip irrigation system to water the soil, not the foliage. Be sure to use mulch in containers, as well.

Each year in early spring, prune them down to 6 inches, just as they start to grow for the season. Called a "one and done", there aren't many plants this easy to care for.

These plants will stay smaller in the colder USDA Growing Zones. After a hard winter, you may need to prune them closer than 6 inches to the ground, but they'll rebound quickly.

Add two inches of mulch over the root system, and plan to reapply in spring. Over time, the mulch will break down to improve your soil!

This tough shrub resists common pathogens like black spot, powdery mildew or leaf rust. Knock Out Roses do very well in humid climates.

Apply a slow-release fertilize once a year in early spring. Follow directions on the label.

You'll love the way White Knock Out Rose makes your landscape shine. Enjoy the abundant flowers, easy-care nature and polished presentation. Order today!

Buying Options for Plants

Nature Hills sells a large variety of plants with several options available. Plants are offered in both potted containers and as dormant bare root without soil. Here is a helpful resource to understand your options as you create a beautiful landscape with help from Nature Hills.

Ever wonder what a larger plant will mean for your landscape? Container Sizes are really all about the age of the plant!

Seasonally, Nature Hills offers hand selected, high quality bare root trees, shrubs and perennials. Bare root plants are sold by height from the top of the root system to the top of the plant. Plants may be taller than the height minimums.

  • Popular sizes of select trees are 1 foot, 2 feet, 3 feet, etc.
  • Popular sizes of select bare root plants is 1 foot, 18 inches, etc.

Nature Hills Container Size by Volume

Keep in mind, specific varieties and different growing conditions can affect the rate at which plants grow. Variations in size may occur.

Young Plants to 18 Months
Size Volume
2"x2"x3" Ranges from .18 to .21 dry quarts / .198 to .23 dry liters in volume
4.5" Container Equal to .65 dry quart / .72 dry liter in volume
Sprinter Pot Equal to .63 dry quart / .69 dry liter in volume
4" Container Ranges from .31 to .87 / .35 to .96 dry liter in volume
6" Container Equal to 1.4 dry quarts / 1.59 dry liters in volume
1 Quart Equal to 1 dry quart / 1.1 dry liter in volume
5.5" Container Equal to 1.89 of a dry quart / 2.08 dry liters in volume
4"x4"x5" Ranges from .8 to 1.1 dry quarts / .88 to 1.2 dry liters in volume
4"x4"x6" Ranges from 1.0 to 1.3 dry quarts / 1.1 to 1.41 dry liters in volume
4"x4"x9" Ranges from 1.1 to 2.1 dry quarts / 1.2 to 2.3 dry liters in volume
4"x4"x10" Ranges from 1.7 to 2.3 dry quart / 1.87 to 2.53 dry liters in volume
Plants 18 Months - 2.5 Years Old
Size Volume
2 Quart Equal to 2 dry quarts / 2.2 dry liters in volume
#1 Container Ranges from 2.26 to 3.73 dry quarts / 2.49 to 4.11 dry liters in volume
5"x5"x12" Equal to 3.5 to 4.3 dry quarts / 3.85 to 4.74 dry liters in volume
Plants 2 - 4 Years Old
Size Volume
#2 Container Ranges from 1.19 to 1.76 dry gallons / 5.24 to 7.75 dry liters in volume
#3 Container Ranges from 2.32 to 2.76 dry gallons / 10.22 to 12.16 dry liters in volume
Plants 3 - 5 Years Old
Size Volume
#5 Container Ranges from 2.92 to 4.62 dry gallons / 12.86 to 20.35 dry liters in volume
#6 Container Ranges from 5.25 to 6.01 dry gallons / 23.12 to 26.42 dry liters in volume
#7 Container Ranges from 5.98 to 6.08 dry gallons / 26.34 to 26.78 dry liters in volume

About 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.

Click Here to learn more

Plant Sentry


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.

*If you have found your zone already, it will be highlighted in the table below.
Color Zone Times
3 Spring 2019
4 Now
5 Now
6 Now
7 Now
8 Now
9 Now
10 Now
11 Now

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


White Knock Out® Rose Is Suited to Grow in Zones 4-11
Growing Zones 4-11
More Information
Brand Knock Out
Botanical Name Rosa 'Radwhite'
Type Deciduous
Mature Height 3 1/2 feet
Mature Spread 3 1/2 feet
Sun Exposure Full Sun
Soil Well Drained
Moisture Medium
Growth Rate Medium
Foliage Color Green
Pollinator Friendly Yes
Pruning Time Early Spring
Fragrant Yes
Photos courtesy of Star Roses and Plants - www.starrosesandplants.com