Rose Knock Out® Description
The original disease resistant rose!
When Knock Out came on to the garden scene nearly 20 years ago, its disease resistance and non-stop blooming ability changed the rose world. And it has cemented its place in horticultural history, remaining a useful classic to this day.
Blooms have a red-pink hue, depending on the light and heat level, and begin in early summer atop dark green glossy foliage.
Flowering continues until the first killing frosts of fall, without any need to deadhead or spray to keep the plants full of flowers and looking great. In autumn, foliage turns burgundy-violet, and is capped with orange-red hips for winter interest.
Incorporate this multi-season rose bush with ornamental grasses, long-blooming Endless Summer hydrangea, thuja Green Giant, and other flowering shrubs!
This amazing group of Knock Out roses lends itself to numerous uses in garden designs from borders, hedges, containers, and even perimeter plantings!
Special features: Blooms first year, Cold hardy, Disease resistant, Easy care, Fast growing, Heat tolerant, Long blooming, Multi-seasonal interest, Reblooming, Season extender
Recommended For You:
- Botanical name:
- Common name:
- Zone: 4,5,6,7,8,9
- Sun exposure:
- Ship form:
- Soil type:
- Soil moisture:
- Height x width:
3' x 3'
- Flower color:
- Foliage color:
- Bloom season:
Accent, Border, Container gardening, Cottage gardening, Foundation planting, Ground cover, Hedge, Mass planting, Ornamental, Specimen
- Cannot ship to:
More Info, How-To's, Videos and more
Soil: Prefers medium moisture, slightly acidic, well-drained garden loam. Roses benefit from the addition of compost, aged manure, or leafmold to the planting soil.
Light: At least 5-6 hours of direct sun per day is preferred, though this variety will grow very well in part shade locations with excellent disease resistance.
Water: One inch of water per week throughout their first growing season. A generous layer of organic mulch (compost or composted manure) helps keep the soil evenly moist. If weather is dry in the fall, be sure to water roses well. Never allow the foliage to remain wet into the evening; water early in the day.
Spacing: 3 - 4 ft.
Fertilizing: To keep the flowers coming, feed your roses with a fertilizer blended especially for roses. This should be done after each bloom cycle.
Winterizing: If you live near a rose's cold limit, and you garden on an exposed site or in an area where rapid temperature fluctuations are common, you should mound two shovelfuls of composted manure, garden soil, compost, or shredded leaves over the base of the plant in late fall after the ground freezes. Covering these mounds and the lower parts of the bushes with evergreen boughs will add protection. Pull the mounding material away from the stem as new growth emerges in spring. Prune branches injured over winter when new buds emerge in spring.
Maintenance & pruning: Cleaning up old foliage is important for disease control. Prune to remove deadwood, to control or direct growth, and to promote flowering. Wait until growth breaks from the canes in early spring before pruning. 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. There is no need to remove faded flowers because these roses are self cleaning.
ReviewsWrite a reviewLove 'em but worried 'cause label said zone 5 even though website said zone 4Margaret J Eppstein | Sep 6, 2020I was very impressed with the condition of the knockout roses when they arrived and so far they are thriving in their first summer. However, the website said these are zone 4 but the tag on the plant said zone 5, so I'm a little worried about how well these will survive our Vermont winters. Fingers crossed. This discrepancy in zone labeling is the only reason I gave this 4 instead of a 5 stars
BeautifulLindsey Scheiblhofer | Oct 4, 2019Wow, these beautiful roses arrived perfectly shipped and well cared for. They were beautiful little rose plants with nice roots, easy to plant. I've purchased several plants in the past from a local nursery only to find that they were severely root-bound but these were in such good condition and ready for planting. The plants came with easy to read instructions and the website provided just enough information to help even a novice gardener like me. I hope to see these thrive next spring and will give updates with such.
Perfect Condition!Sharon W | Apr 19, 2018I wanted to express how pleased I was with my order that I received this week. The packing and roses were in perfect condition. Our weather has been cold and rainy, but I look forward to a week or so of planting them. Thank you so much for all the help I've received from your company, I will contact you again to let you know the progress of my roses!
Great Quality Rose BushesSinan Karasulu | Jun 5, 2017My wife and I recently purchased 13 double knockout rose bushes from here. they were well packed and alive by the time they arrived at our door. We love our rose bushes. Thanks!
Beautiful Roses!Debra A | May 25, 2014Received our ordered roses today. Could not believe how wonderfully secure they were shipped. Arrived without any damage to plants/boxes. Thank you. You have a new customer. Keep up the great work.
Wonderful Roses!Sharon S | May 15, 2014I just wanted to contact you and let you know that my roses were received in great shape - your packing was tremendous. The roses are now in their new bed and blooming profusely.