Double Knock Out rosebushes were developed in 2004 to be naturally resistant to diseases and insects. They bloom continually for nine months of the year in warmer areas and are one of the most maintenance free of all roses.
The flowers are red, and in winter, the leaves turn from green to a dark burgundy red, which then fades to a reddish orange. Rosebushes grow 3 to 4 feet high and 2 to 3 feet wide.
Double Knock Out rosebushes can take rain or drought, heat or cold. They are hardy in Zones 4 to 9---all but the coldest and hottest.
Plant where the bushes can get full or partial sun. From Zones 6 to 9, plant so that the place where the stem meets the root is about 1 inch above the soil level. In Zones 4 and 5, it should be 1 inch below the surface.
Prune in the spring to remove any broken, diseased or dead branches. Feed with a regular rose food once a month. Keep the soil moist and do not let it dry out between waterings.
Double Knock Out rosebushes are used as hedges, along fences and as borders for walkways.
- Double Knock Out Rose Fact Sheet
- Knock Out Rose Care
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Regina Sass has been a writer for 10 years, penning articles for publications in the real estate and retail industries. Her online experience includes writing, advertising and editing for an educational website. Sass is a member of the Society of Professional Journalists.