Diff: Knock Out
Comparing revision #1 (2026-06-08 01:24:48) with revision #2 (2026-06-08 22:42:43).
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{{Cultivar infobox |
{{Cultivar infobox |
| cultivar = [[Knock Out]] |
| cultivar = [[Knock Out]] |
| selling_names = Knock Out; RADrazz |
| selling_names = Knock Out; RADrazz |
| class = Shrub rose |
| class = Shrub rose |
| breeder = William J. Radler |
| breeder = William J. Radler |
| introduced = 2000 |
| introduced = 2000 |
| colour = Cherry red |
| colour = Cherry red |
| bloom_form = Single, repeat-flowering clusters |
| bloom_form = Single, repeat-flowering clusters |
| fragrance = None to light |
| fragrance = None to light |
| repeat_bloom = Successive flushes spring through fall in suitable climates |
| repeat_bloom = Successive flushes spring through fall in suitable climates |
| height = About 6 ft in Earth-Kind notes |
| height = About 6 ft in Earth-Kind notes |
| spread = About 6 ft in Earth-Kind notes |
| spread = About 6 ft in Earth-Kind notes |
| hardiness = Earth-Kind lists zones 5b-9 |
| hardiness = Earth-Kind lists zones 5b-9 |
| disease_resistance = Trial-backed landscape rose; black spot resistance is source-backed but not immunity |
| disease_resistance = Trial-backed landscape rose; black spot resistance is source-backed but not immunity |
| rrd_notes = No cultivar should be treated as immune to [[Rose Rosette Disease]]. |
| rrd_notes = No cultivar should be treated as immune to [[Rose Rosette Disease]]. |
| parentage = (Carefree Beauty x seedling) x (Razzle Dazzle x seedling) |
| parentage = (Carefree Beauty x seedling) x (Razzle Dazzle x seedling) |
| patent = RADrazz/Knock Out names require current patent/trademark checks before propagation or sale |
| patent = RADrazz/Knock Out names require current patent/trademark checks before propagation or sale |
| best_for = Low-maintenance shrub plantings, hedges, massing, beginner gardens |
| best_for = Low-maintenance shrub plantings, hedges, massing, beginner gardens |
}} |
}} |
== Knock Out == |
== Knock Out == |
Knock Out is a modern shrub rose best treated as a landscape plant rather than a hybrid-tea substitute. It is useful where repeat bloom and reduced disease management matter, but it still needs sun, spacing, and monitoring for RRD. |
Knock Out is a modern shrub rose best treated as a landscape plant rather than a hybrid-tea substitute. It is useful where repeat bloom and reduced disease management matter, but it still needs sun, spacing, and monitoring for RRD. |
=== Evidence snapshot === |
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* Identity: use the infobox fields only where the cited sources support them. |
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* Performance: Earth-Kind provides cultivar facts, hardiness, growth size, parentage, and low-input landscape evidence; WFRS lists Knock Out among internationally recognised Hall of Fame roses. |
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* Disease interpretation: resistance or award notes are regional evidence, not immunity. |
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* Legal interpretation: propagation and selling-name notes are not legal advice; check current local law and rights records before distributing plants. |
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=== Growing notes === |
=== Growing notes === |
In humid regions, choose it for reduced black spot pressure but keep sanitation and airflow. In hot regions, establish roots deeply before expecting drought tolerance. In cold regions, check local winter survival and graft/own-root status. |
In humid regions, choose it for reduced black spot pressure but keep sanitation and airflow. In hot regions, establish roots deeply before expecting drought tolerance. In cold regions, check local winter survival and graft/own-root status. |
=== What to photograph === |
=== What to photograph === |
* Whole plant from several feet away, including support or container. |
* Whole plant from several feet away, including support or container. |
* A fresh bloom and an older bloom. |
* A fresh bloom and an older bloom. |
* Leaf upper and lower surfaces. |
* Leaf upper and lower surfaces. |
* Cane base, graft or own-root shoots if visible. |
* Cane base, graft or own-root shoots if visible. |
* Any disease, mite, herbicide, or RRD-like symptoms with dates and weather context. |
* Any disease, mite, herbicide, or RRD-like symptoms with dates and weather context. |
=== Common cautions === |
=== Common cautions === |
* Do not use the brand name to identify every red landscape rose. |
* Do not use the brand name to identify every red landscape rose. |
* RRD can infect Knock Out roses, so distorted cane growth should still be triaged. |
* RRD can infect Knock Out roses, so distorted cane growth should still be triaged. |
* Match advice to region, root system, and rose class before pruning or treating. |
* Match advice to region, root system, and rose class before pruning or treating. |
* Use [[Regional Rose Care Tips]] and local extension or RHS guidance for climate-specific adjustments. |
* Use [[Regional Rose Care Tips]] and local extension or RHS guidance for climate-specific adjustments. |
=== Community tips === |
=== Community tips === |
* Browse tips for this cultivar: https://roses.iwiki.net/tips?cultivar=Knock+Out |
* Browse tips for this cultivar: https://roses.iwiki.net/tips?cultivar=Knock+Out |
* Add a tip only if it names the region, zone or climate cue, root type when known, and what worked. |
* Add a tip only if it names the region, zone or climate cue, root type when known, and what worked. |
* Upvote tips that are specific and honest about tradeoffs; report unsafe pesticide or propagation advice. |
* Upvote tips that are specific and honest about tradeoffs; report unsafe pesticide or propagation advice. |
Use controls lawfully: Current local product label/register wins for any pesticide, fertiliser, or soil amendment use. |
Use controls lawfully: Current local product label/register wins for any pesticide, fertiliser, or soil amendment use. |
=== Sources === |
=== Sources === |
* [Texas A&M Earth-Kind: Knock Out](https://aggie-horticulture.tamu.edu/earthkindroses/cultivars/knock-out/) |
* [Texas A&M Earth-Kind: Knock Out](https://aggie-horticulture.tamu.edu/earthkindroses/cultivars/knock-out/) |
* [Texas A&M Earth-Kind: How Cultivars Are Selected](https://aggie-horticulture.tamu.edu/earthkindroses/how-cultivars-are-selected/) |
* [Texas A&M Earth-Kind: How Cultivars Are Selected](https://aggie-horticulture.tamu.edu/earthkindroses/how-cultivars-are-selected/) |
* [University of Maryland Extension: Rose Rosette Disease](https://www.extension.umd.edu/resource/rose-rosette-disease) |
* [University of Maryland Extension: Rose Rosette Disease](https://www.extension.umd.edu/resource/rose-rosette-disease) |
* [World Federation of Rose Societies: Hall of Fame](https://www.worldrose.org/hall-of-fame/) |
* [World Federation of Rose Societies: Hall of Fame](https://www.worldrose.org/hall-of-fame/) |
[[Category:Cultivars]] |
[[Category:Cultivars]] |
[[Category:Cultivar Profiles]] |
[[Category:Cultivar Profiles]] |
[[Category:Regional Notes]] |
[[Category:Regional Notes]] |