Fountain Grass vs Knockout Rose

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

Fountain Grass

Pennisetum alopecuroides

Poaceae · grasses

Deer ResistantDrought TolerantLow Maintenance

Knockout Rose

Rosa 'Radrazz'

Rosaceae · flowers

Drought TolerantLow Maintenance

Hardiness Zone Range

Fountain Grass (Zones 5-9)

Knockout Rose (Zones 5-10)

Overlap: Both grow in zones 5–9

Detailed Comparison

Feature	Fountain Grass	Knockout Rose
Scientific Name	Pennisetum alopecuroides	Rosa 'Radrazz'
Family	Poaceae	Rosaceae
Category	grasses	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Well-drained	Well-drained
Height	4'	4'
Spread	3'	4'
Bloom Season	Summer-Fall	Spring-Fall
Bloom Color	Pink, Tan	Red, Pink
Growth Rate	Fast	Fast
Native Region	East Asia, Australia	Hybrid (US)
Maintenance	Low	Low

Special Traits

Fountain Grass

No — EdibleYes — Deer ResistantYes — Drought Tolerant

Knockout Rose

No — EdibleNo — Deer ResistantYes — Drought Tolerant

Care Tips

Fountain Grass

✓Cut back to 6 inches in late winter before new growth.
✓Divide every 3-4 years.
✓Leave seed heads for winter interest.
✓Drought tolerant once established.

Knockout Rose

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

Which Plant Is Right for Your Garden?

Choose Fountain Grass if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with medium water in zones 5–9.

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.

Plant them together? Both overlap in zones 5–9. They share similar sun requirements (full sun), making them potential garden companions.

View Fountain GrassProfile →View Knockout RoseProfile →

Frequently Asked Questions

Can Fountain Grass and Knockout Rose grow in the same hardiness zone?

Fountain Grass grows in USDA zones 5-9, while Knockout Rose grows in zones 5-10. Both plants can grow together in zones 5 through 9.

Do Fountain Grass and Knockout Rose have the same sun and water needs?

Fountain Grass needs full sun and medium water, while Knockout Rose needs full sun and medium water. They share similar growing requirements and can be planted in the same bed.

Which grows taller, Fountain Grass or Knockout Rose?

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

Are Fountain Grass and Knockout Rose deer resistant?

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

Which is easier to maintain, Fountain Grass or Knockout Rose?

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

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Detailed Comparison

Feature	Fountain Grass	Knockout Rose
Scientific Name	Pennisetum alopecuroides	Rosa 'Radrazz'
Family	Poaceae	Rosaceae
Category	grasses	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Well-drained	Well-drained
Height	4'	4'
Spread	3'	4'
Bloom Season	Summer-Fall	Spring-Fall
Bloom Color	Pink, Tan	Red, Pink
Growth Rate	Fast	Fast
Native Region	East Asia, Australia	Hybrid (US)
Maintenance	Low	Low

Care Tips

Fountain Grass

✓Cut back to 6 inches in late winter before new growth.
✓Divide every 3-4 years.
✓Leave seed heads for winter interest.
✓Drought tolerant once established.

Knockout Rose

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

Which Plant Is Right for Your Garden?

Choose Fountain Grass if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with medium water in zones 5–9.

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.

Plant them together? Both overlap in zones 5–9. They share similar sun requirements (full sun), making them potential garden companions.

Frequently Asked Questions

Can Fountain Grass and Knockout Rose grow in the same hardiness zone?

Fountain Grass grows in USDA zones 5-9, while Knockout Rose grows in zones 5-10. Both plants can grow together in zones 5 through 9.

Do Fountain Grass and Knockout Rose have the same sun and water needs?

Fountain Grass needs full sun and medium water, while Knockout Rose needs full sun and medium water. They share similar growing requirements and can be planted in the same bed.

Which grows taller, Fountain Grass or Knockout Rose?

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

Are Fountain Grass and Knockout Rose deer resistant?

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

Which is easier to maintain, Fountain Grass or Knockout Rose?

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