Double Red Knock Out® Rose Bush

Double Red Knock Out® Rose Bush

15 reviews
  • Reblooming

  • Self-cleaning

  • Disease resistant

  • Drought tolerant

Regular price $39.95 Sale price $24.95 38% off

  • In stock, ready to ship
  • Inventory on the way
  • Ships in 2-3 business days
  • Buy direct from the grower
  • Family owned farm since 1980
  • You're good to grow this in Zone X

Explosive Red Blooms Cover This Shrub from Spring to Fall

This Double Red Knock Out® Rosebush will be a knockout of the park with its explosion of color all summer long!

The red double knockout rose bush has set a new standard in disease resistance when it comes to a beautifully bright and low-maintenance bloom. It is of the same rose family as the original rose of the knock-out family from Star Roses and plants.

This rose plant produces rich, cherry red to hot pink blossoms that will continue to grow until the first hard frost of winter. They are fully double flowers on the shrub rose bush. The bloom cycle starts in early spring. Roses will bloom from spring until mid-summer profusely before the weather gets too hot. The bloom period will decrease slightly as fall and winter happen although it is relatively heat tolerant.

The red roses contrast nicely to the dark green foliage of the flowering shrub. If grown as a flowering tree, the red blooms will cascade over the green leaves year after year. This classic rose is slightly more winter hardy than other roses but may need extra winter protection in colder areas.

The rose bush features incredible resistance to black spots and powdery mildew leaf diseases and is an excellent choice as a low hedge or accent plant in mixed beds. They can even be container grown as an indoor patio plant for the ultimate flower power.


Grow the Red Knock Out rose tree in full sun to partial sun or part shade across the United States in USDA growing zones 5-10. It can get up to 3 feet tall and 3 feet wide and is extremely fast-growing. The best time of the year to plant the knockout roses is in early spring or fall so it has a whole growing season to establish its root system.

Planting Knockout Rose Bushes

Double Knock Out rose bushes prefer well-drained soil that is kept moist during the growing season. Be sure to examine the surrounding soil to make sure it’s suitable for your new rose bushes. A  Slow-Release Fertilizer applied at the top of the root ball will help tremendously with new blooms. Water thoroughly the first year of planting to establish strong roots. Newly planted roses require 1-2 inches of water per week.

They are extremely cold hardy and easy to grow roses with some special care. They can be grown in most areas of the country and the red flowers will grace any landscape. Drought tolerant and self-cleaning once established, this aesthetic rose shrub suits every garden and every lifestyle.

Double Red knockout roses are easy to care for and provide beautiful rose blooms during the spring and summer blooming season. Occasionally, we get customers asking us why their rose bushes leaves turn yellow. It’s usually a sign of overwatering or soil that’s too compact and doesn’t allow oxygen to flow to the roots. Be sure to aerate the native soil if it compacted with perlite or vermiculite to help with air circulation. Other causes of yellowing leaves could be downy mildew but that is uncommon and should be treated with fungicides.

Perfect Plants offer their very own specially formulated Rose Planting Mix to amend the soil you are planting your new rose bush or rose container in.

Shop the red Double KnockOut Roses for sale.

Grow guide for Roses is available as well as another blog on how to Plant a Rose Bush.

Shipping information

Once your Double Red Knock Out® Rose Bush order is placed, we will ship your plant(s) within seven business days year round unless during the checkout process you request otherwise in the space provided to do so.

Perfect Plants’ shipping specialists carefully package your plants using a proven packaging method that ensures your plants arrive healthy, colorfully alive and ready to flourish. We’ve coined the term ‘upside down box test’ and we do just that; we carefully package so that regardless of the direction your box is handled, it will not harm your precious plant that’s inside.

No shipping process is without a problem from time to time. On rare occasions some plants may experience some of the following during their transit: drooping, minor leaf-loss and/or minimal yellowing/discoloration, minor limb damage, etc. These instances are quite rare, but can happen when shipping plants in boxes.

Plants normally recover within a few weeks after planting. If a damaged box has injured your plant on the inside, please notify us within 5 days of receiving you package(s) by emailing us a photograph of the damage.

We always do our very best to ensure that your plants are packed and shipped in the safest, gentlest and most effective way possible.

Will my plants and trees look like the photographs?

Absolutely! Unlike other online nurseries, our photos are of actual plants and trees we’ve grown here, on our family operated nursery.

Growing our own plants and trees helps to ensure we ship you the best quality plants that are free of pests and diseases.

Your plants and trees may however not ship with flowers on them, like the photographs. This all depends on the time of year you buy your plant or tree. Crape Myrtle trees, for example, only bloom during the summer months, so if you purchase one during the spring or fall, they would ship without flowers. Once planted, your plants will grow and thrive giving you flowers for many years to come!

Pot Sizes

Pot sizes (commonly referred to in gallons) are shipped in the same size nursery trade pots which may vary in actual volume. Some plants may have been at the approximate pot size listed, but require excess dirt to be removed so that you will not be paying any additional shipping costs. This doesn’t happen very often though.

Shipping Fees

Our shipping charges are based on the value of your order and the destination it is being shipped. Please see the chart on the Shipping Info page to get an exact amount. We frequently have a free shipping promotion to help you save!


The Double Red Knock Out® Rose Bush does best in full sun or partial shade, too much shade can reduce flower development. Soil should be rich in organic matter. Amending soil by mixing your own soil with a supplemented, enriched soil can help in offering them an ideal growth environment.

Roses tolerate only mild drought, and should be watered regularly especially until established. Roses as a general rule prefer to be watered at their base, such as by a drip system. Frequently wet leaves can lead to a variety of fungal or pest problems.

Pruning is very important to promote densely growing, well producing Roses. Early spring is the optimum pruning time in most areas. Faded flowers can be snipped at any time to encourage repeat bloom (rather than seed) production.

Click here for our more extensive Rose Grow Guide

Planting Instructions

Dig a hole approximately twice as wide as your new plant’s root ball and deep enough so that the top of the root ball is equal with the ground level.

Loosen the root ball using a small garden spade or by hand. Breaking smaller outer roots can encourage growth into the new soil, but take care to not damage large primary roots.

Place the plant in the hole and ensure that it is situated evenly upright. Use the excavated soil to fill in around the root ball, using your foot to pack it in firmly. Thoroughly soak with a hose as you fill in the dirt. Take great care to not leave any gaps or air spaces around the root ball as this could kill the plant.

A 2-4 inch layer of mulch is strongly recommended to help retain moisture and discourage weed growth. Apply mulch over the entire planting area but keep away from the stems or trunk by a few inches. Ensure that the plant and surrounding soil is completely soaked with water.

To ensure the proper nutrients are available for the life of your Double Red Knock Out® Rose Bush, our proprietary Perfect Plants Special Blend Soil and a once yearly application of Nutricote Total 360 Fertilizer are great considerations for your new plants!

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Botanical Name
Rosa x 'Radtko'

Full Sun / Partial Shade

Foliage Color

Flower Color
Red, hot pink

Mature Width
3 ft

Mature Height
3 ft

Growing Zones 5, 6, 7, 8, 9, 10

Customer Reviews
4.9 Based on 15 Reviews
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Absolutely wonderful…the roses look great and after a couple of weeks are doing very well. Would definitely order from you again and recommend you to my friends!

Earl C.

We are VERY pleased with our plant and it is doing well. It is hard to believe the flowers we saw on arrival and still. The rose was well packaged and arrived is great condition.

Bao P.


Looks good! Tons of blooms

Melanie M.

Received my order quickly; plants were in good condition; plants are thriving; pleased with my order.

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