Knock Out® Roses

Knock Out® Roses

Knockout Roses are beloved plants grown by many people for their low maintenance qualities, exceptional pest and disease resistance, and low spreading habit.

Rose bushes have been planted for centuries by gardeners all over the world for their gorgeous blooms and tantalizing scent. They can be seen growing in garden beds, as borders, or even as container plants.

These groundcover roses have continuous bloom cycles that start in the early spring and go through fall or even the first frost.

Our selection of Knock Out® Roses includes single and double knockout roses. We have a variety of colors to choose from to give your garden a burst of colorful flowers.

These rose plants are exceptionally cold hardy and can be grown across most of the United States. Full sun to partial shade is best for these hardy evergreen shrubs. These rose bushes can be pruned into small trees. Learn how to plant a rose bush.

Prune knockout roses only to the desired shape. They generally will stay small plants and only need pruning once annually to maintain their rounded form. Deadheading spent flower blossoms will encourage more bloom periods.

Roses do not require any special soils. However, if you plant your rose bush in an area with poor soil conditions we recommend using our Rose Planting Mix to amend it.

The Knock Out® Family of Roses will provide your landscape with proliferous blooms and color for months at a time!

Check out the Rose Grow Guide for more information on growing and planting rose bushes.

Shop Knockout Roses for sale.

Knock Out® Rose Care

How Do You Plant Knock Out Roses

Choose your planting site in an area with sun or partial shade. Dig a hole at least twice the size of the root ball. Take the rose bush out of its nursery container and loosen up the root ball if you desire. Place the Knock Out Rose in the planting hole and backfill with native soil or amended soil such as our Rose Planting Mix. Make sure the top of the root ball is level with the ground. Water thoroughly and repeat as necessary when the soil is dry. Add mulch to help retain moisture. 

How to Care for Knock Out Roses

Knock Out Roses prefer at least 6 hours of sunlight each day. An annual application of slow release fertilizer will benefit rose bushes and help them grow stronger, bloom more often and for longer, and give it healthy foliage. A regular watering schedule will ensure the roses have proper moisture and don't dry out. Be sure to water at the base of the plant rather than overhead. Wetting the foliage can cause leaf spots or fungal disease. Deadheading spent flowers will encourage more blooms.

Knock Out Rose Winter Care

If your roses are planted in the ground, a thick layer of mulch or organic matter such as pine bark or hay will help insulate and protect the roots during hard freezes. If your roses are in containers, you can move the rose container indoors to a warmer spot during the coldest temperatures. 

Can you Plant Knock Out Roses in Shade?

Roses will perform best with at least 6-8 hours of sun per day. They can tolerate planting sites with partial shade but they will produce more foliage and flower buds with sunshine. 

Can Knock Out Roses Grow in Pots?

Knock Out Roses can absolutely grow in pots! Their mature size is up to 3-5 feet tall and wide so they are the perfect small shrub to have in a container on your porch or patio. 

How to Prune Knock Out Roses

Pruning Knockout rose bushes is very beneficial for the plants! Remove any dead or withered branches or spent flower blossoms to encourage new growth. Removing long stems will encourage bushier growth resulting in a stronger, happier plant. When Knock Out rose bush pruning, you can reduce the size of the bush by ⅓ once a year to open up the center and create a large, healthy rose bush.

When to Prune Knock Out Roses

The best time to get knock out rose pruning done is in the early spring. However, you can prune them at virtually any time of the year to promote new growth.

Can You Trim Knock Out Roses in the Fall?

Yes you can trim rose bushes in the fall. As a general rule of thumb, you don't want to do too much pruning during the midst of winter. New growth on rose bushes is more susceptible to frost damage. 

When Should You Fertilize Knock Out Roses

The best time to fertilize Knock Out Roses is in early spring through summer so the flowers have plenty of nutrients to produce beautiful buds for months at a time!

Best Knock Out Rose Fertilizer

The best fertilizer for Knock Out rose bushes is a balanced, slow release type that will release nutrients to the plant for an extended period of time.

What is the Knock Out Rose Bush Size

The Knock Outs can grow up to 3-5 feet tall and wide. They can be maintained to whatever size and shape is desired and respond very well to pruning. If you prefer you to keep your rose bushes smaller and compact then you are free to do so!

Knock Out Rose Disease

While known for being highly disease resistant, these hardy shrubs can sometimes be at the mercy of some terrible disease. Black spot, blight, rust, and powdery mildew are not often seen but problems can arise. Luckily, they are very responsive to treatments against fungal diseases when and if that time comes.