Black-Eyed Susan vs Lupine

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

Black-Eyed Susan

Rudbeckia hirta

Asteraceae · flowers

Deer ResistantDrought TolerantLow Maintenance

Lupine

Lupinus polyphyllus

Fabaceae · flowers

Deer ResistantMedium Maintenance

Hardiness Zone Range

Black-Eyed Susan (Zones 3-9)

Lupine (Zones 4-7)

Overlap: Both grow in zones 4–7

Detailed Comparison

Feature	Black-Eyed Susan	Lupine
Scientific Name	Rudbeckia hirta	Lupinus polyphyllus
Family	Asteraceae	Fabaceae
Category	flowers	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Well-drained	Well-drained, Slightly Acidic
Height	3'	4'
Spread	1' 6"	2'
Bloom Season	Summer-Fall	Late Spring-Summer
Bloom Color	Yellow	Blue, Purple, Pink, Yellow
Growth Rate	Fast	Medium
Native Region	Eastern North America	North America
Maintenance	Low	Medium

Special Traits

Black-Eyed Susan

No — EdibleYes — Deer ResistantYes — Drought Tolerant

Lupine

No — EdibleYes — 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.

Lupine

✓Don't transplant — deep taproot.
✓Direct sow or plant young.
✓Nick seed coat before planting.
✓Nitrogen-fixing — don't fertilize.
✓Cool summers preferred.

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 Lupine if you don't mind medium maintenance, and want deer resistance. It thrives in full sun with medium water in zones 4–7.

Plant them together? Both overlap in zones 4–7. They share similar sun requirements (full sun), making them potential garden companions.

View Black-Eyed SusanProfile →View LupineProfile →

Frequently Asked Questions

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

Black-Eyed Susan grows in USDA zones 3-9, while Lupine grows in zones 4-7. Both plants can grow together in zones 4 through 7.

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

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

Lupine grows taller at 4' compared to Black-Eyed Susan at 3'. Lupine spreads 2' while Black-Eyed Susan spreads 1' 6".

Are Black-Eyed Susan and Lupine deer resistant?

Yes, both Black-Eyed Susan and Lupine are considered deer resistant, making them excellent choices for gardens in areas with deer pressure.

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

Black-Eyed Susan has low maintenance while Lupine has medium maintenance. Black-Eyed Susan may be easier for beginning gardeners to manage.

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Detailed Comparison

Feature	Black-Eyed Susan	Lupine
Scientific Name	Rudbeckia hirta	Lupinus polyphyllus
Family	Asteraceae	Fabaceae
Category	flowers	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Well-drained	Well-drained, Slightly Acidic
Height	3'	4'
Spread	1' 6"	2'
Bloom Season	Summer-Fall	Late Spring-Summer
Bloom Color	Yellow	Blue, Purple, Pink, Yellow
Growth Rate	Fast	Medium
Native Region	Eastern North America	North America
Maintenance	Low	Medium

Care Tips

Black-Eyed Susan

✓Deadhead spent blooms to encourage reblooming.
✓Divide clumps every 3-4 years.
✓Tolerates poor soil and drought once established.

Lupine

✓Don't transplant — deep taproot.
✓Direct sow or plant young.
✓Nick seed coat before planting.
✓Nitrogen-fixing — don't fertilize.
✓Cool summers preferred.

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 Lupine if you don't mind medium maintenance, and want deer resistance. It thrives in full sun with medium water in zones 4–7.

Plant them together? Both overlap in zones 4–7. They share similar sun requirements (full sun), making them potential garden companions.

Frequently Asked Questions

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

Black-Eyed Susan grows in USDA zones 3-9, while Lupine grows in zones 4-7. Both plants can grow together in zones 4 through 7.

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

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

Lupine grows taller at 4' compared to Black-Eyed Susan at 3'. Lupine spreads 2' while Black-Eyed Susan spreads 1' 6".

Are Black-Eyed Susan and Lupine deer resistant?

Yes, both Black-Eyed Susan and Lupine are considered deer resistant, making them excellent choices for gardens in areas with deer pressure.

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

Black-Eyed Susan has low maintenance while Lupine has medium maintenance. Black-Eyed Susan may be easier for beginning gardeners to manage.