Rose White Knock Out® Description
Masses of 3" snow-white bloom cover this new disease-free landscape rose from late spring/early summer until frost!
If you're looking for an easy care, flower filled hedge that goes with any color and any style of home, White Knock Out rose is your solution!
Plants begin their flower show in late spring with dozens of large, 3" snow-white blooms set atop very dark green glossy foliage.
White Knock Out rose (formerly known as White Out) was bred by Bill Radler of Wisconsin. Bill is the hybridizer of the world-loved series of Knock Out roses.
Exceptionally clean & disease-resistant foliage, long bloom time, and perfect habit make this a superb choice for hedges in the landscape!
White Knock Out rose is extra-easy care, because the flower show will continue without you having to waste time removing old flowers. It has been bred to be self cleaning!
Perfect companion plants for roses include ornamental grasses, fragrant coneflowers, and drought-proof sedums.
Features: Blooms first year, Cold hardy, Disease resistant, Easy care, Fast growing, Heat tolerant, Long blooming, Multi-seasonal interest, Reblooming, Season extender
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- Height x width:
3' x 3'
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Accent, Border, Container gardening, Cottage gardening, Foundation planting, Ground cover, Hedge, Massing, Ornamental, Specimen
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- Patent #:PP#20,273
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 a 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 reviewHealthy and prettyJoanne Thomas | May 1, 2020I am so pleased to finally have a white Knock-Out rose! I've searched for it locally for a long time. I love my pink and yellow ones. They quadrupled in size in one year! The little white rose bush arrived with one bloom and a number of buds, in perfect condition. Planting her whenever the RAIN ever stops! :)
Beautiful and Healthy!Onelia W | Jan 24, 2018Thank you for the beautiful and healthy Knock Out Roses I received! Looking forward to ordering more plants from your company!