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- Growth habit
- Bush
- Flowering
- Repeat-flowering
- Breeder
- Radler
- Listed for
- United States
Overview
Knock Out is a red shrub rose bred by Radler and introduced by Star Roses in 2000, with US plant patent PP11836 granted in 2001 ('Radrazz'). Its flowers have about 10 petals, measure about 2.8 in (7 cm), and carry a mild, spicy scent. Both parents are numbered Radler seedlings. It won the All-America Rose Selections award in 2000. The patent describes very good resistance to black spot and rust in its observations. A widely planted shrub rose for low-effort landscape color.
Knock Out traits
- Red flowers with about 10 petals, near 2.8 in (7 cm) across
- Mild, spicy fragrance
- All-America Rose Selections winner, 2000
- Patent observed very good resistance to black spot and rust
Good for
- Landscape beds
- Low hedges
- Mass planting
Compare with other rose varieties
Blank cells mean there is no data on record. Select a variety name to open its page.
| Variety | Days to maturity | Growth habit | Type |
|---|---|---|---|
| Knock Out this page | — | Bush | — |
| Abbaye de Cluny | — | Bush | — |
| About Face | — | Bush | — |
| AC De Montarville | — | Bush | — |
| All American Magic | — | Bush | — |
| Always Hope | — | Bush | — |
| Amber Queen | — | Bush | — |
Knock Out FAQ
What kind of rose is Knock Out?
Knock Out is a red shrub rose bred by Radler and introduced by Star Roses in 2000, with US plant patent PP11836 granted in 2001 ('Radrazz'). Its flowers have about 10 petals, measure about 2.8 in (7 cm), and carry a mild, spicy scent.
How does Knock Out compare with other rose varieties?
Knock Out: bush. Similar rose varieties include Abbaye de Cluny, About Face, AC De Montarville. The comparison table on this page lists days to maturity, growth habit and type side by side.
What is Knock Out good for?
Knock Out is grown for landscape beds, low hedges, mass planting.
Sowing, care and common problems
Sowing times, care and common problems are the same for every rose variety, so they are covered once in the growing guide.
- Rose growing guide
- How to Prune Roses: When to Cut and How Hard
- Types of Roses: How the Group Decides the Pruning
- Rose Problems: Black Spot, Powdery Mildew and Aphids
- How to Care for Roses: Feeding, Watering and Deadheading
- Rose Growing Calendar: What to Do in Each Season
- Overwintering Roses: Protecting the Graft and the Canes
- All 309 rose varieties
Source
Source: United States Patent and Trademark Office
The text on this page is our own summary written from the published variety record, not a copy of it.