Growing Knock Out® Roses

I receive a huge amount of questions about growing The Knock Out® Family of Roses and it's easy to understand why they are so popular. 

The original Knock Out® Rose was introduced in 2000 by The Conard-Pyle Co./Star® Roses. Created by Wisconsin rose breeder William Radler to reduce the rose gardener's to do list with a plant that was cold hardy, disease resistant and incredibly floriferous. Knock Out® is cold tolerant to zone 5, heat tolerant throughout the U.S., reliably resistant to disease and produces a bevy of blooms every 5 to 6 weeks from spring until the first hard frost. I'd call that success! No wonder it won the AARS Award that year.

P. Allen Smith now has a dedicated place for all your Knock Out and Drift Roses. View it here

There are seven beautiful members of The Knock Out® Family of Roses in a wide range of colors ranging from cherry red to creamy yellow.

The Knock Out® Rose

The Double Knock Out® Rose

The Pink Knock Out® Rose

The Double Pink Knock Out® Rose

The Blushing Knock Out® Rose

The Sunny Knock Out® Rose

The Rainbow Knock Out® Rose

The natural inclination of The Knock Out® Family of Roses is to grow to about 3' wide x 4' tall, but they are easily maintained at a smaller size through pruning.  They are ideal for growing in mixed borders, in containers or as a hedge.

Just like other roses, The Knock Out® Family of Roses perform best when planted in full sun.  The soil should be well drained and fertile.

Plant the roses 4 feet apart to allow for room to grow and good air circulation.   

To keep the flowers coming feed your roses with a fertilizer blended especially for roses.  This should be done after each bloom cycle.  There is no need to remove faded flowers because these roses are self cleaning – another task you can remove from your to do list!

Prune in late winter or early spring, while the plant is still dormant.  Remove any dead or damaged wood, do a little shaping if necessary, and take out some of the interior stems to improve air circulation.  Every 2 or 3 years remove about one third of the old branches to stimulate new, fresh growth.  If you are trying to keep the roses at a certain height, you can cut them back hard with hedge shears.  No need to worry about usual rose pruning rule of cutting back to an outward facing leaf bud – just lop them down to the desired size.  I've even seen Knock Out® Roses spring back beautifully after being cut down to 6-inches. 

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Knockout diseases?

by on June 14, 2014 09:02
I have 5 knockout roses and some of them look like something is eating on them. I sprayed them and it doesn\'t seem to help. I thought knockouts are suppose to be disease free? I don\'t know if they need a fertilize or what else to do? I\'ve looked for bugs on them but don\'t find anything. Some of the leaves are just eat up and they have some places that look yellow and brown like they are dying. Please help!

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