Knockout Rose vs Rosemary

Side-by-side plant comparison — which is right for your garden?

Knockout Rose

Rosa 'Radrazz'

Rosaceae · flowers

Drought TolerantLow Maintenance

Rosemary

Salvia rosmarinus

Lamiaceae · herbs

EdibleDeer ResistantDrought TolerantLow Maintenance

Hardiness Zone Range

Knockout Rose (Zones 5-10)

Rosemary (Zones 7-10)

Overlap: Both grow in zones 7–10

Detailed Comparison

Feature	Knockout Rose	Rosemary
Scientific Name	Rosa 'Radrazz'	Salvia rosmarinus
Family	Rosaceae	Lamiaceae
Category	flowers	herbs
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧 Low
Soil	Well-drained	Well-drained, Sandy
Height	4'	4'
Spread	4'	3'
Bloom Season	Spring-Fall	Spring
Bloom Color	Red, Pink	Blue, Purple
Growth Rate	Fast	Medium
Native Region	Hybrid (US)	Mediterranean
Maintenance	Low	Low

Special Traits

Knockout Rose

No — EdibleNo — Deer ResistantYes — Drought Tolerant

Rosemary

Yes — EdibleYes — Deer ResistantYes — Drought Tolerant

Care Tips

Knockout Rose

✓Prune by 1/3 in late winter.
✓No spraying needed — highly disease resistant.
✓Deadheading optional but encourages faster rebloom.
✓Feed in spring.

Rosemary

✓Requires excellent drainage — root rot is the main killer.
✓Don't overwater.
✓Prune after flowering to maintain shape.
✓Can be trained as topiary or hedge.

Which Plant Is Right for Your Garden?

Choose Knockout Rose if you want a low-maintenance plant, need drought tolerance. It thrives in full sun with medium water in zones 5–10.

Choose Rosemary if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with low water in zones 7–10.

Plant them together? Both overlap in zones 7–10. They share similar sun requirements (full sun), making them potential garden companions.

View Knockout RoseProfile →View RosemaryProfile →

Frequently Asked Questions

Can Knockout Rose and Rosemary grow in the same hardiness zone?

Knockout Rose grows in USDA zones 5-10, while Rosemary grows in zones 7-10. Both plants can grow together in zones 7 through 10.

Do Knockout Rose and Rosemary have the same sun and water needs?

Knockout Rose needs full sun and medium water, while Rosemary needs full sun and low water. Their differing requirements mean you may need separate garden areas for each.

Which grows taller, Knockout Rose or Rosemary?

Both Knockout Rose and Rosemary reach approximately 4' in height, with spreads of 4' and 3' respectively.

Are Knockout Rose and Rosemary deer resistant?

Rosemary is deer resistant, but Knockout Rose is not. If deer are a concern, Rosemary is the better choice, or protect Knockout Rose with fencing.

Which is easier to maintain, Knockout Rose or Rosemary?

Both Knockout Rose and Rosemary have low maintenance requirements. They need a similar level of care including regular attention to watering, pruning, and soil health.

Explore More Data Tools

For adjacent public-data tools, methodology notes, and network updates, visit DataPeek Facts.

Detailed Comparison

Feature	Knockout Rose	Rosemary
Scientific Name	Rosa 'Radrazz'	Salvia rosmarinus
Family	Rosaceae	Lamiaceae
Category	flowers	herbs
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧 Low
Soil	Well-drained	Well-drained, Sandy
Height	4'	4'
Spread	4'	3'
Bloom Season	Spring-Fall	Spring
Bloom Color	Red, Pink	Blue, Purple
Growth Rate	Fast	Medium
Native Region	Hybrid (US)	Mediterranean
Maintenance	Low	Low

Care Tips

Knockout Rose

✓Prune by 1/3 in late winter.
✓No spraying needed — highly disease resistant.
✓Deadheading optional but encourages faster rebloom.
✓Feed in spring.

Rosemary

✓Requires excellent drainage — root rot is the main killer.
✓Don't overwater.
✓Prune after flowering to maintain shape.
✓Can be trained as topiary or hedge.

Which Plant Is Right for Your Garden?

Choose Knockout Rose if you want a low-maintenance plant, need drought tolerance. It thrives in full sun with medium water in zones 5–10.

Choose Rosemary if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with low water in zones 7–10.

Plant them together? Both overlap in zones 7–10. They share similar sun requirements (full sun), making them potential garden companions.

Frequently Asked Questions

Can Knockout Rose and Rosemary grow in the same hardiness zone?

Knockout Rose grows in USDA zones 5-10, while Rosemary grows in zones 7-10. Both plants can grow together in zones 7 through 10.

Do Knockout Rose and Rosemary have the same sun and water needs?

Knockout Rose needs full sun and medium water, while Rosemary needs full sun and low water. Their differing requirements mean you may need separate garden areas for each.

Which grows taller, Knockout Rose or Rosemary?

Both Knockout Rose and Rosemary reach approximately 4' in height, with spreads of 4' and 3' respectively.

Are Knockout Rose and Rosemary deer resistant?

Rosemary is deer resistant, but Knockout Rose is not. If deer are a concern, Rosemary is the better choice, or protect Knockout Rose with fencing.

Which is easier to maintain, Knockout Rose or Rosemary?

Both Knockout Rose and Rosemary have low maintenance requirements. They need a similar level of care including regular attention to watering, pruning, and soil health.