Black-Eyed Susan vs Knockout Rose

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

Black-Eyed Susan

Rudbeckia hirta

Asteraceae · flowers

Deer ResistantDrought TolerantLow Maintenance

Knockout Rose

Rosa 'Radrazz'

Rosaceae · flowers

Drought TolerantLow Maintenance

Hardiness Zone Range

Black-Eyed Susan (Zones 3-9)

Knockout Rose (Zones 5-10)

Overlap: Both grow in zones 5–9

Detailed Comparison

Feature	Black-Eyed Susan	Knockout Rose
Scientific Name	Rudbeckia hirta	Rosa 'Radrazz'
Family	Asteraceae	Rosaceae
Category	flowers	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Well-drained	Well-drained
Height	3'	4'
Spread	1' 6"	4'
Bloom Season	Summer-Fall	Spring-Fall
Bloom Color	Yellow	Red, Pink
Growth Rate	Fast	Fast
Native Region	Eastern North America	Hybrid (US)
Maintenance	Low	Low

Special Traits

Black-Eyed Susan

No — EdibleYes — Deer ResistantYes — Drought Tolerant

Knockout Rose

No — EdibleNo — Deer ResistantYes — Drought Tolerant

Care Tips

Black-Eyed Susan

✓Deadhead spent blooms to encourage reblooming.
✓Divide clumps every 3-4 years.
✓Tolerates poor soil and drought 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 Black-Eyed Susan if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with medium water in zones 3–9.

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 Black-Eyed SusanProfile →View Knockout RoseProfile →

Frequently Asked Questions

Can Black-Eyed Susan and Knockout Rose grow in the same hardiness zone?

Black-Eyed Susan grows in USDA zones 3-9, while Knockout Rose grows in zones 5-10. Both plants can grow together in zones 5 through 9.

Do Black-Eyed Susan and Knockout Rose have the same sun and water needs?

Black-Eyed Susan 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, Black-Eyed Susan or Knockout Rose?

Knockout Rose grows taller at 4' compared to Black-Eyed Susan at 3'. Knockout Rose spreads 4' while Black-Eyed Susan spreads 1' 6".

Are Black-Eyed Susan and Knockout Rose deer resistant?

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

Which is easier to maintain, Black-Eyed Susan or Knockout Rose?

Both Black-Eyed Susan 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	Black-Eyed Susan	Knockout Rose
Scientific Name	Rudbeckia hirta	Rosa 'Radrazz'
Family	Asteraceae	Rosaceae
Category	flowers	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Well-drained	Well-drained
Height	3'	4'
Spread	1' 6"	4'
Bloom Season	Summer-Fall	Spring-Fall
Bloom Color	Yellow	Red, Pink
Growth Rate	Fast	Fast
Native Region	Eastern North America	Hybrid (US)
Maintenance	Low	Low

Care Tips

Black-Eyed Susan

✓Deadhead spent blooms to encourage reblooming.
✓Divide clumps every 3-4 years.
✓Tolerates poor soil and drought 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 Black-Eyed Susan if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with medium water in zones 3–9.

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 Black-Eyed Susan and Knockout Rose grow in the same hardiness zone?

Black-Eyed Susan grows in USDA zones 3-9, while Knockout Rose grows in zones 5-10. Both plants can grow together in zones 5 through 9.

Do Black-Eyed Susan and Knockout Rose have the same sun and water needs?

Black-Eyed Susan 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, Black-Eyed Susan or Knockout Rose?

Knockout Rose grows taller at 4' compared to Black-Eyed Susan at 3'. Knockout Rose spreads 4' while Black-Eyed Susan spreads 1' 6".

Are Black-Eyed Susan and Knockout Rose deer resistant?

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

Which is easier to maintain, Black-Eyed Susan or Knockout Rose?

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