Black-Eyed Susan vs Petunia

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

Black-Eyed Susan

Rudbeckia hirta

Asteraceae · flowers

Deer ResistantDrought TolerantLow Maintenance

Petunia

Petunia × hybrida

Solanaceae · flowers

Low Maintenance

Hardiness Zone Range

Black-Eyed Susan (Zones 3-9)

Petunia (Zones 2-11)

Overlap: Both grow in zones 3–9

Detailed Comparison

Feature	Black-Eyed Susan	Petunia
Scientific Name	Rudbeckia hirta	Petunia × hybrida
Family	Asteraceae	Solanaceae
Category	flowers	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Well-drained	Well-drained
Height	3'	1'
Spread	1' 6"	2'
Bloom Season	Summer-Fall	Spring-Fall
Bloom Color	Yellow	Mixed
Growth Rate	Fast	Fast
Native Region	Eastern North America	South America
Maintenance	Low	Low

Special Traits

Black-Eyed Susan

No — EdibleYes — Deer ResistantYes — Drought Tolerant

Petunia

No — EdibleNo — Deer ResistantNo — 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.

Petunia

✓Fertilize every 2 weeks for best bloom.
✓Trim back leggy plants by half in midsummer for revival.
✓Water regularly but don't overwater.
✓Excellent in hanging baskets.

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 Petunia if you want a low-maintenance plant. It thrives in full sun with medium water in zones 2–11.

Plant them together? Both overlap in zones 3–9. They share similar sun requirements (full sun), making them potential garden companions.

View Black-Eyed SusanProfile →View PetuniaProfile →

Frequently Asked Questions

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

Black-Eyed Susan grows in USDA zones 3-9, while Petunia grows in zones 2-11. Both plants can grow together in zones 3 through 9.

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

Black-Eyed Susan needs full sun and medium water, while Petunia 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 Petunia?

Black-Eyed Susan grows taller at 3' compared to Petunia at 1'. Black-Eyed Susan spreads 1' 6" while Petunia spreads 2'.

Are Black-Eyed Susan and Petunia deer resistant?

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

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

Both Black-Eyed Susan and Petunia 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	Petunia
Scientific Name	Rudbeckia hirta	Petunia × hybrida
Family	Asteraceae	Solanaceae
Category	flowers	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Well-drained	Well-drained
Height	3'	1'
Spread	1' 6"	2'
Bloom Season	Summer-Fall	Spring-Fall
Bloom Color	Yellow	Mixed
Growth Rate	Fast	Fast
Native Region	Eastern North America	South America
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.

Petunia

✓Fertilize every 2 weeks for best bloom.
✓Trim back leggy plants by half in midsummer for revival.
✓Water regularly but don't overwater.
✓Excellent in hanging baskets.

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 Petunia if you want a low-maintenance plant. It thrives in full sun with medium water in zones 2–11.

Plant them together? Both overlap in zones 3–9. They share similar sun requirements (full sun), making them potential garden companions.

Frequently Asked Questions

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

Black-Eyed Susan grows in USDA zones 3-9, while Petunia grows in zones 2-11. Both plants can grow together in zones 3 through 9.

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

Black-Eyed Susan needs full sun and medium water, while Petunia 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 Petunia?

Black-Eyed Susan grows taller at 3' compared to Petunia at 1'. Black-Eyed Susan spreads 1' 6" while Petunia spreads 2'.

Are Black-Eyed Susan and Petunia deer resistant?

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

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

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