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How to Keep Knockout Roses Blooming Through Fall

Updated on July 18, 2011
Beautiful red knockout roses blooming
Beautiful red knockout roses blooming

Knockout Rose Beautiful Blooms - Perfect Roses for Beginners

You've planted knockout roses and they have started displaying their beautiful blooms. Now, you wonder how to keep your knockout roses blooming all the way through fall. It's pretty easy to do.

Read more on knockout roses care and information below.

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My Education into the Care of Roses

I have a bit of history with roses and all of their problems. Or rather, my husband does. We bought an old house that used to have a rose garden on the south side. Only a couple of the rose bushes survived.

My husband set to reviving them and adding new roses. It was an exercise in futility. We live in the humid south. The poor roses and my poor husband kept fighting, but it was a losing battle. He would get rid of one problem and another would pop up. You name it, our roses got it- mold, fungus, aphids, Japanese beetles, black spot, powdery mildew, the works.

I explained to him that the previous owners no doubt had a professional gardener that worked on the rose garden full time. He still was not deterred. As a matter of fact, my husband didn't give up on the roses until he took a job that required travel almost all year long.

Pink knockout rose flower bloom
Pink knockout rose flower bloom

Characteristics of Hardy Knock out Rose Bushes

That was when I decided to plant knockout rose bushes. They are hardy shrub roses that grow about three feet high. In warmer climates, they can grow larger. There are many varieties and colors of knockouts, including red, pink, rainbow, and double knockout roses. I had planned on putting some in the back yard, but decided to add them to the south rose garden.

Knockout roses are a true success story in the botanical world. Knockout roses are very hardy perennial plants. They can withstand conditions in which other roses would not last even a few days. Besides being hard in drought conditions, knockout roses also survive cold and hot weather very well. Knockout roses are also much more resistant to diseases and pests than other types of roses.

One Other Carefree Characteristic of Knockout Rose Bushes

Another great thing about knockout rose bushes is that they were developed to deadhead themselves, basically. What this means is that whenever a bloom dies, knockout roses will drop off the withered bloom in order to replace it with a new one. They will bloom about every six weeks or so until late fall. Many other rose species must be deadheaded manually, or the rose will stop blooming for the season.

All that being said, there are ways to keep your knockout roses blooming from spring all the way up until the first fall hard frost. While knockout roses normally bloom on their own, you can help the process along with a few simple steps. This can result in more blooms, and more frequent flowering.

Easiest Way to Keep Knockout Roses Blooming More Frequently

Another great thing about knockout rose bushes is that they were developed to deadhead themselves, basically. What this means is that whenever a bloom dies, knockout roses will drop off the withered bloom in order to replace it with a new one. They will bloom about every six weeks or so until late fall. Many other rose species must be deadheaded manually, or the rose will stop blooming for the season.

Care of Knockout Roses and More Ways to Keep Knockout Roses Blooming Longer

Although knockouts are drought resistant, regular watering will produce more blooms if the season is dry. Water at the bottom to avoid promoting diseases. Even though knockout roses are disease resistant, it is still better to take these steps. Help keep the moisture in the ground by lightly mulching around the base of the rose bush, leaving about an inch gap near the main trunk to avoid mildew or disease. On the flip side, don't over water your roses. They must be in well-drained soil to prevent possible rot.

Of course, adding fertilizer will help keep your knockout roses blooming regularly. Find one formulated specifically for roses. Water the soil well to protect the roots before adding the rose fertilizer. Start fertilizing them after the first flowering cycle is over. Continue to fertilize according to the package instructions til the end of the summer season.

If aphids are a problem with your knockout roses, try neem oil spray. It is a natural way to get rid of pests without using harmful chemicals.

Neem Oil Spray for Rose Bushes

Planting Knockout Rose Bushes for Best Results

If you haven't planted your knockout rose bushes yet, they do best in sunny locations, just like other roses. Most roses require pretty much full sun to do well at all. Knockout roses can get by on partly shady conditions, but they do best in sun. Try to plant them in well-drained soil. This is one of the most important requirements for healthy knockout rose bushes.

Add compost or manure to the soil before planting, if possible. You can also add rose fertilizer formulated just for this purpose.

Best Time to Do Knockout Rose Bush Pruning for More Knockout Rose Blooms

Another way to keep knockout roses blooming each year is to prune them back each spring, early in the season. This will produce new growth and blooms.

How to Keep Knockout Roses Blooming Through Fall Comments

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    • Lady Guinevere profile image

      Debra Allen 7 years ago from West By God

      Thank You for this informative hub! I have a couple of them and love them.

    • Angela Harris profile image
      Author

      Angela Harris 7 years ago from Around the USA

      Thanks for the compliment! I love knockout roses, too. They are my lazy gardener's dream! ;-)

    • Sandyspider profile image

      Sandy Mertens 7 years ago from Wisconsin, USA

      Thanks for the information. We love to plant roses.

    • katiem2 profile image

      katiem2 7 years ago from I'm outta here

      Thanks for the helpful how to keep knockout roses blooming through-fall. I have some roses that will benefit from this. Thanks and Peace :)

    • Hello, hello, profile image

      Hello, hello, 7 years ago from London, UK

      Thank you for a wonderful help.

    • habee profile image

      Holle Abee 7 years ago from Georgia

      I used to grow roses. I need to plant more. Great tips!

    • prasetio30 profile image

      prasetio30 7 years ago from malang-indonesia

      good tips for beautiful flower. I liked it very much!

    • GiftedGrandma profile image

      GiftedGrandma 7 years ago from USA

      They are quite popular in my neighborhood. Thanks for the information.

    • samiaali profile image

      samiaali 7 years ago

      Thanks for a very informative article. I just purchased several Knockout Rose plants. I planted 2 of them and will plant the others this weekend. I can't wait. You have given me some useful tips. Thanks!

    • profile image

      Emily 7 years ago

      Last Friday we just planted 12 knock-out roses around our fountain and got up Monday morning to find all the beautiful blooms missing!!! Did deer eat them?

    • Jim and Laura profile image

      Jim and Laura 7 years ago from Chicago area

      Very informative hub! I love Knock Out Roses and recommend them to anyone looking for an easy care, low maintenance rose.

    • profile image

      Mini Greenhouse 6 years ago

      My gran used to prune her roses so aggressively it used to bother me, thinking that it would never recover. Then later in the year they'd be a huge bloom of colour and she'd say 'told you so' haha. Great hub here, thank you for the info

    • profile image

      Laurie Annie 5 years ago

      My knock roses have black spots and it looks like something is eating them rather aggressively. I am going to cut them back and treat them. Have you heard of epson salt sprinkled in the soil. Is it ok for me to prune them know? Any words of wisdom shared would be greatly appreciated!

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