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OMRI

Knock Out' Rose



This rose first hit the scene around the year 2000 and was considered a breakthrough shrub rose because of its hardiness and exceptional ability to resist disease. In 2000 the Knock Out Rose was one of 3 roses to win the prestigious AARS (All-American Rose Selections) award for outstanding garden performance.

Details on the Knock Out Rose:

  • Hardiness: Zones 4-9
  • Sun Exposure: Full sun
  • Size: 4 feet high and about 4 feet wide
  • Blooming Time: Spring to Frost
  • Soil: Fertile and well drained soil
  • Maintenance: Minimal

Note: The Knock Out Rose will grow in a wide range of soils (even highly alkaline clays) and is very heat- and drought-tolerant once established.




How did this incredible rose come into being?

Knock Out rose was developed by Wisconsin rose breeder William Radler who has been growing roses since his youth. He was the long time director of the Boerner Botanical Garden in Minneapolis and has recently served as consulting rosarian for the Chicago Botanical Garden.

His breeding efforts began about 20 years ago and focused on developing repeat blooming, cold hardy roses that didn’t get disease, especially black spot. There is much more to the story but in the end an incredible rose was developed.

Just think… A rose bush that has these traits:

  • Disease Resistant
  • Blooms from Spring to Frost
  • Drought & heat tolerant
  • Minimal maintenance
  • Etc…