Height: 24-36 in. (60-90 cm) 36-48 in. (90-120 cm)
Spacing: 24-36 in. (60-90 cm)
Hardiness: USDA Zone 4a: to -34.4 °C (-30 °F) USDA Zone 4b: to -31.6 °C (-25 °F) USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F) USDA Zone 9a: to -6.6 °C (20 °F) USDA Zone 9b: to -3.8 °C (25 °F)
Bloom Color: Red blend (rb)
Bloom Shape: Semi-double
Flower Fragrance: Slightly Fragrant
Bloom Time: Late Spring/Early Summer Blooms repeatedly
Habit: Shrub Can be trained as a standard or tree form
Patent Information: Patented
Other Details: Shade-tolerant Resistant to black spot Resistant to mildew Resistant to rust Sets hips
Pruning Instructions: Blooms on new wood; prune early to promote new growth
Soil pH requirements: 5.6 to 6.0 (acidic) 6.1 to 6.5 (mildly acidic)
Propagation Methods: From softwood cuttings From semi-hardwood cuttings From hardwood cuttings By grafting By budding
I know some rose enthusiasts believe they are 'over-rated', over-planted and hyped but I love them. Having tried to raise hybrid teas in the past with the endless spraying, feeding and still watching black spot take over, Knockout Roses are like a dream come true. Endless blooms, no black spot, little watering required and they bloom even if you don't feed them. We have two of the red's at our farm sign up at the top of our long driveway far away from a watering hose and even in the hot, dry summer, they contnue to perform beautifully. I intend to try other hardy shrub roses elsewhere but for lasting season-long color, vigor, ease of care and beauty where you can't fuss with them all the time, they can't be beat!
I have only had this rose for maybe 3 days i keep the soil slightly moist but over the last day i noticed the roses pedals looked burned is it getting too much sun? The buds look healthy and I didnt have in the ground until the second day after purchase. Could this effect the way it is growing?
On May 23, 2011, rcmartin from Hanover, PA (Zone 6a) wrote:
I am very satisfied with the knock out roses. I have planted 2 double pinks and 2 double reds. The reds were planted in 2009 and the pinks in 2010. Very satisfied with them, growth has been phenominal. Last year I did not cut them back very far and the reds grew to about 4 1/2 feet. This year I trimmed both kinds in the late fall and then again in the spring as they were beginning to sprout new growth. I even thinned them out like you would do on a normal rose bush. Growth has been good and they just began to blossom over this weekend (5/20-22-2011). I dead head them during the season and learned early not to go beyond the first leaf on the branch if I want additional flowering.
On May 22, 2011, BUFFY690 from Prosperity, SC (Zone 7b) wrote:
I have two pink doubles and they are blooming like crazy, although they haven't gained any size, I think I am going to loosen the soil and add some organic fertilizer and see if I can give the whole plant a boost. I did have leaves all winter though.
I bought my only Knockout because my row of roses, along the south edge of my garden, passes within 25 feet of the neighbor's flowering crab -- a variety that gets totally loaded with black spot every year and spreads the black spot to my roses. So when Knockout came out and was advertised as 100% resistant to black spot, I tried one.
My Knockout never grew all that well. It hardly got over a foot high, even though I fertilize weekly until August 1. (That's the kind of pushing one has to do in NE Wisconsin, where even "boxed and buried" roses typically get through our 25-below winters with only 4 to 8 inches alive at the bottom.) I don't really like the color -- it's too much to the pink side of red, and I like truly red roses. And it is absolutely useless as a cut flower -- there is no stem long enough to cut. I am aware that one does not plant shrub roses to get cut flowers, but it is possible to to get some flowers off of some of them, for example, "Cuthbert Grant."
I eventually transplanted the Knockout to get it out of the main rose row. It still lives. it is hardy enough to survive the winter with only a heavy much, and it is really resistant to black spot and other diseases. But as a rose I think it's very overrated.
On Oct 7, 2010, braun06 from Peoria Heights, IL (Zone 5b) wrote:
The plants are great, they are tough, but heck yeah there are tons of more choices out there. Knockouts are overplanted. It is likely planted at your local Mcdonalds in large masses. I like diversity, which is better for the eye and for our virus/disease proned biology. If a disease comes through that likes the genetics of these plants so well, it will go by way of the elm very quickly and leave many cities with empty plant beds.
On May 13, 2010, julzperry from Horn Lake, MS wrote:
I have two of these planted in a location right up against my house. They get sun from 11 am until the sun goes down. They are wonderful performers, and have reached the height of 10 feet in only 6 years. They do not seem to be growing any taller anymore. I have never pruned or fertilized mine. I just planted them and left them alone.. They are a must have for any rose lover!
On Nov 3, 2009, Julie35 from Fort Wayne, IN wrote:
Should this plant be covered during a freeze just at freezing point? I have buds and full flowers which may need coverage this week. I'm from the sunny South, where many plants can die when it gets down near the freezing point. However, I'm not sure what a shrub rose does when the weather is within its cold hardiness. Please advise.
I planted two bushes during late summer, and the blooms continue into mid-autumn in zone 5.
On Oct 8, 2009, MsHammer from Mount Upton, NY wrote:
I have only had mine just this summer and I love the Knockout Roses! They bloomed and grew all summer long and we had a Very wet summer and cold too, up here in the Northeast. I have 2.. one is pink and one is red. They are still blooming and it is now October with cold nights and more rainy days ! We did not have too many Japanese Beetles this summer for some reason.They always ruin my other roses , but they did not harm the Knockouts. I think I will be buying more of these, since they are very hardy and kept blooming all summer. I never had to water them because of all the rain we had all summer long and now most of the Fall. I did dead-head them whenever I was out there to look at them. They are still full of buds. I will put some leaf mulch around them bottom of the plants for the winter as I usually do my other roses. I am looking forward to learning more about these great roses!
On Jul 23, 2009, graciebelle from North Bennington, VT wrote:
I have a few Knock Outs (Red, Double Red and Rainbow) . The red ones are doing OK - some Japanese beetles here and there but they continue to bloom through it all. But the Rainbow one is covered with Japanese beetles - not much left of the leaves or the blossoms at this point - and it's still covered with JB every morning. I kind of feel like it's now the sacrificial plant for the entire garden. Guess I'll just stick to the earlier varieties.
On Jan 27, 2009, dotin87 from Detroit, TX (Zone 7a) wrote:
Great plant for mass plantings. I saw these in N. Dallas planted in the medians and fell in love with them. When we moved to our N.E. Texas ranch, we planted a hedge (20)along the entrance to our garage. They have bloomed profusely every summer since 2006. Originally, after a very wet winter two plants' leaves showed yellowing with brown edges and stunted growth. I kept watering and occassionlly fertilizing them during the droughty summer. A local nursery woman told me I was watering them too much and that they loved abuse. No problem! Quit watering the remainder of hot, dry summer- they did great. Highly recommend them for this area 7a,b, especially for someone like me that doesn't know anything about raising roses.
On Apr 24, 2008, Gardenia731 from (Arlene) Lakeland, FL (Zone 9a) wrote:
My father bought me my first knockout rose for 2007 Christmas while visiting form Puerto Rico. This was my test to begin a garden in my new house. Well, he planned this very well because I am hooked. Since December of 2007 I am on a role with these roses.
I have a very hectic lifestyle with 2 teenagers, 2 dogs, a husband and a very demanding career. I am truly enjoying all the blooms the rose provides daily. So far I am the happy owner of 2 single (1pink, 1red) and four dbl knock outs.
I highly recommend this rose to anyone who is just starting a garden(ing) and even if you are a pro this rose is a must have. Presently looking for the rainbow knockout.
On Mar 20, 2008, GreeneLady from Oak Island, NC (Zone 8a) wrote:
Knock out Roses were specifically bred to handle the hot summers of the south. Will grow in the north, but knock outs need heat to flourish. These roses LOVE water and need to be mulched at the base. If you let them dry out, flower production will be way down and the bushes will look ratty and will loose leaves quickly.
I have 18 planted forming a hedge in front of my house. As of 3/19/08 in zone 8, Everyone of my bushes is profusely covered with new buds, and should be blooming by the first or second week in April. The hedge is now two years old. At the end of the first season in '06, most of them were nearly 4 feet tall. In late january of 07, I pruned the roses back to 3 feet each. During the 07 season they spread out and the hedge has totally filled in. At the end of the 2007 growing year, the roses were nearly 5 feet tall.
The trick to getting these bloom prolifically is to cut of the rose hips and not letting them go to seed. These bloomed all summer for about 3 weeks at a time, rest for 3 weeks and then repeated blooming. This pattern lasts from mid April to early November.
Knock outs tolerate abuse well, but to see the full potential of this rose, it takes some care. I use Bayer 2 in 1 Rose food, with fertilizer and systemic insectide. I never saw any evidence of mildews, fungus, or black spot.
On Jul 31, 2007, biddyusmc from Raeford, NC (Zone 7b) wrote:
I really like this beautiful rose. It does have a fragrance, and a very nice one at that. When there are many blooms, it is very noticeable. Otherwise, you have to get very close in order to smell it. It has flourished in over 100 degree heat with full sun exposure. My soil is very acidic and the rose blooms like crazy. This rose is a source of constant color from early spring to late fall. Like a previous poster commented, it will have deep red blooms which fade to a light pink shade before they fall off. I am very happy with this rose because it take very little maintenance and is resistant to extreme heat and humidity and freezing cold. It is nearly a no-brainer shrub that is perfect for those who have difficulty keeping plants alive and thriving.
On Jun 25, 2007, Meig from Far Northwest 'burbs, IL (Zone 5a) wrote:
I love the color of these roses.
I am disappointed in the face that they didn't survive without dying back to the ground in my Z5 garden this past winter (1st winter in the ground) since everyone raves about how hardy they are. I only lost one plant (out of 11) but all the survivors died back to the ground. All are back and growing, but some are doing better than others.
I live in a very open, windy area, so maybe this had something to do with the dieback. I do love how these look so they are sticking around for another season or two. I hope as they establish more they will get more hardy. Otherwise I'll have to cover them like any other rose.
ET (June 3, 2008): These are still not doing well in my garden. They consistently die down to the ground every winter and I lost three of them this winter, even though we had good snowcover.
On Jun 8, 2007, Allie88 from Palmyra, PA (Zone 6a) wrote:
I LOVE these roses. It says that they only have a slight fragrance, but we have them planted near our pool and by a walk way and they have the most delightful fragrance. I have had no disease problems, whatsoever. I bring them in my house as cut flowers all the time. They flower abundantly all summer! It's one of my favorite flowers.
On Oct 31, 2006, NHLady from Exeter, NH (Zone 5a) wrote:
I've been gardening for many years and, like many gardeners, I had lost patience with roses. A friend who works at a local nursery assured me I would like Knock Out. She was so right! I have 7-8 of them now and each one has adapted well to its location. I had to transplant several in August. They tolerated the move nicely and they even rewarded me with new blossoms. It's now Halloween in New Hampshire and I am still cutting buds to bring indoors. I enthusiastically recommend them. If you are new to gardening and want to try rose shrubs, plant Knock Out--you won't regret it.
We have been growing this for 3 years. The first year was very successful, with copious blooms.
At the beginning of the second season, I cut the plants back a little, esp. some dead canes. Blooming was not as good as the first year.
This is now the 3rd year and blooms are good, but there is very little repeat flowering. There are Japanese beetles all over them (I pick them off by hand) and there is now some evidence of black spot and some other fungal disease on the stems. This is disappointing.
On Jun 13, 2006, SummerSun06 from Townsend, MA (Zone 5b) wrote:
The only rose I have grown with no die back with no protection in my zone 5 garden. I have them in an exposed site with no winter protection and they came back in better condition than roses in a protected spot with protection. They look great in a mass planting. An amazing rose.
On May 19, 2006, boneyween from Shawnee Mission, KS wrote:
Highly recommended for new rose growers because of this plant's strong resistance to the dreaded black spot disease. Blooms are initially a florescent cherry red, fading to a soft pink. In my experience, you'll get the most profuse blooming in full sun and with regular deadheading, but no special cutting techniques are required. Mine have a light scent when the blooms open, but it fades after a couple days.
On Mar 16, 2006, JaxFlaGardener from Jacksonville, FL (Zone 8b) wrote:
I have three of the red "Knock Out" roses in various degrees of sun in my garden, from full sun to mostly shade. The one in full sun has grown the largest, but all of them have grown and bloomed profusely for me.
As mentioned above, I think the most effective use of these roses is in mass plantings packed tightly together and pruned to make hedges about 24 inches high. Planted singly, the bush growth habit tends to look somewhat scraggly and thin.
I planted 9 Knockout roses under less than ideal conditions (soil not well amended, part sun) and they have bloomed and bloomed for me. The only disappointment I have had with them is that they did not produce the beautiful hips that the supplier promised. Maybe they would have under better conditions.
On Aug 14, 2005, michaeladenner from Deland, FL wrote:
Though everyone calls it a single, it's not a true single like, say, a cherokee rose. I'd call it a semi-double. Grows very nicely (on Fortuniana) here in Florida in filtered sun. Does like fertilizer, but otherwise absolutely zero maintenance. I don't even bother pruning.
On Jul 24, 2004, seedlng from Fort Lauderdale, FL wrote:
south-east florida : fort lauderdale
I WAS IMPRESSED HOW WELL THEY SURVIVE AND CONTINUED TO BLOSSOM WITHOUT ANY SIGNS OF TROUBLE. FALL LEAVES WERE BEAUTIFUL AS WELL.
pss : i was so impressed i give this plant out as gifts whenever i can thru mail orders ..to new hampshire and florida
I have 16 of these roses in various areas of my south florida home.
Before I bought any I was subjected 3 roses to my own experiement/s. I needed something that i did not have to
care about , that would bloom reliably and dependably.
I did not care whether they gave fragrance, although a plus.
i care about color and security aroung my yard. I also had to think about how they would look with a carefree attitude garden that i enjoy.
I bought 3, for my experiment.
1, was kept in its nursery pot and in a water dish on my concrete patio, left in a corner of my patio that received full sun in morning and no sun in evening. watering was by handwhenever i remembered and no pruning.
2 others, were put in the ground on my nothside property side yard. they were sheered to be hedges, behind them was fence that planted vines of jasimine & bougainvillea
in a cypress mulch bedding inter planted with purple shade and white shades of verbena. watering was with a drip system which sometimes didnt not work...and pruning to create a hedge. sun was morning and evening.
After 1-year , the plant on the patio was thriving in its pot ( still after 2-3 years ). now holding its own in the same pot on my front door step , put simply in another pot. Since this is the one i left unpruned --it looked graceful and somewhat wild. the rose hips are orangy... very nice. i just have to remember to add water.
the planted in the ground are doing quite well.
i use a 3 ft wooden vine trellis that sometimes come with vine plants from the garden centers to remember where i have to prune them back to. theya re doing just fine...
--- since then i have added 5-6 to the north side back yard.
all red, i ahve added new additions to the front yard under the front window...mixed with white liriope, louisiana irises and white vinca... to create a natural grassy area. looks nice
near the 3 tier italian fountain that makes a dramatic display under a live oak near by ...
OVER ALL ---I would recommend this plant to anyone and have to say I am convinced this plant --is a good choice for beginners.
SUN OR PART SHADE
NO DISEASES NOTICED
THRIVES WELL IN THE HUMIDITY.
no noticeable fragrance
On Feb 11, 2004, jyoung from Baton Rouge, LA wrote:
'Knockout' roses are one of the easiest, most profuse blooming, and disease resistent plants. Used in mass plantings for landscape use in a very clay type moist soil in south Louisiana, this rose continues to thrive. We have had several nights with freezing temperatures as low as 26 F, and sevaral days of rainfall, as much as 4 inches at a time. The plants kept their blooms through late November and continue to produce new growth throughout the winter season. The summer months don't seem to affect this plant neither. Constant blooms and good growth are a plus for the rose family and all gardeners should have this one in their collection.
On Feb 11, 2004, maggiemoo from Conroe, TX (Zone 9a) wrote:
I've had this rose for almost a year exactly (I won it for Valentines Day, 2003.) Texas A&M has designated this an "Earthkind" rose, meaning it can pretty much handle all types of soils and neglect, and still perform. In my 8b - 9a zone garden it is just now finally takng a rest. Otherwise, it always has blooms on it, and while it did get some black spot, it never bothered the plant. I've never been able to detect even the slightest fragrance, but its good looks coupled with low maintenance make up for it. Other than a lack of fragrance, the only negative I can find is that it has killer thorns, so watch out when you're working around it! One of the garden call-in shows I listen to on Sat mornings is hosted by a landscape company to the north of Houston. They use this extensively as a landscape shrub. It doesn't really need pruning, but I'm going to trim back a few branches that have kind of struck out on their own, just to keep it in a good shape. I'm pretty new to gardening, even more so to roses, so this has been a pretty satisfying experience for me.
Bred in the U.S. 1999 by William Radler
Bloom: Cherry-red, orange-red, orange-red blend.
ARS Color: mr Medium red
Average Diameter: 3 3/4 inches
Single flower, repeat
Awards: All-American RS
This plant has been said to grow in the following regions:
, Auburn, Alabama Birmingham, Alabama Dothan, Alabama Huntsville, Alabama Saraland, Alabama Lake Havasu City, Arizona Mesa, Arizona Scottsdale, Arizona Fayetteville, Arkansas Floral, Arkansas Shannon Hills, Arkansas Carrabelle, Florida Citrus Springs, Florida Deltona, Florida Fish Hawk, Florida Gibsonia, Florida Glencoe, Florida Gulf Breeze, Florida Hampton, Florida Jacksonville, Florida Juno Beach, Florida Keystone Heights, Florida Lake City, Florida Mascotte, Florida North Andrews Gardens, Florida North River Shores, Florida Palm Coast, Florida Panama City, Florida Port Saint Joe, Florida Saint Cloud, Florida South Daytona, Florida Spring Hill, Florida Summerfield, Florida Timber Pines, Florida Umatilla, Florida Wauchula, Florida Wekiva Springs, Florida Atlanta, Georgia Blackshear, Georgia Cordele, Georgia Gray, Georgia Harlem, Georgia Lakeview, Georgia Marietta, Georgia Patterson, Georgia Pembroke, Georgia Waleska, Georgia Arlington Heights, Illinois Des Plaines, Illinois Hampton, Illinois Niles, Illinois Oak Brook, Illinois River Forest, Illinois Spring Grove, Illinois Urbana, Illinois Wheaton, Illinois Fishers, Indiana Fort Wayne, Indiana Jamestown, Indiana Cedar Rapids, Iowa Des Moines, Iowa Sageville, Iowa Andover, Kansas Fairway, Kansas Crofton, Kentucky Baton Rouge, Louisiana Brownsville-bawcomville, Louisiana (2 reports) Covington, Louisiana Eden Isle, Louisiana Inniswold, Louisiana Lafayette, Louisiana Simmesport, Louisiana Bowie, Maryland Ellicott City, Maryland Germantown, Maryland Beverly, Massachusetts Dracut, Massachusetts North Billerica, Massachusetts Sandwich, Massachusetts Townsend, Massachusetts Benton Harbor, Michigan Holland, Michigan Stephenson, Michigan Ypsilanti, Michigan Albert Lea, Minnesota Horn Lake, Mississippi Ridgeland, Mississippi Affton, Missouri Camdenton, Missouri Omaha, Nebraska Plattsmouth, Nebraska Manchester, New Hampshire Ocean View, New Jersey Roswell, New Mexico Campbell Hall, New York Croton-on-hudson, New York Great River, New York Mechanicville, New York Mount Upton, New York North Tonawanda, New York Syracuse, New York Bowmore, North Carolina Cary, North Carolina Chapel Hill, North Carolina Concord, North Carolina (2 reports) Gibsonville, North Carolina Mint Hill, North Carolina Raleigh, North Carolina (2 reports) Vale, North Carolina Weaverville, North Carolina Winston-salem, North Carolina Akron, Ohio Bucyrus, Ohio Columbus, Ohio Lewis Center, Ohio Hulbert, Oklahoma Tulsa, Oklahoma Coopersburg, Pennsylvania East Norriton, Pennsylvania Harleysville, Pennsylvania Mohrsville, Pennsylvania Palmyra, Pennsylvania Parkville, Pennsylvania Ridgway, Pennsylvania Tyrone, Pennsylvania West Wyomissing, Pennsylvania Whitehall, Pennsylvania Conway, South Carolina Inman, South Carolina Prosperity, South Carolina Summerville, South Carolina Germantown, Tennessee Hendersonville, Tennessee Knoxville, Tennessee Austin, Texas (2 reports) Baytown, Texas Carrollton, Texas China Spring, Texas Cinco Ranch, Texas Dallas, Texas Detroit, Texas Elgin, Texas Fort Worth, Texas Frisco, Texas Georgetown, Texas Haltom City, Texas Heath, Texas Houston, Texas Iredell, Texas Midlothian, Texas North Zulch, Texas Paris, Texas Pecan Grove, Texas Richmond, Texas Rockport, Texas Rowlett, Texas (2 reports) San Antonio, Texas (2 reports) Spring, Texas (2 reports) Sunset Valley, Texas Chantilly, Virginia Danville, Virginia Hampton, Virginia Henrico, Virginia Manassas, Virginia Pembroke, Virginia Toano, Virginia Seattle, Washington Bolivar, West Virginia Petersburg, West Virginia Ellsworth, Wisconsin Little Chute, Wisconsin Pardeeville, Wisconsin