Delphinium vs Lupine

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

Delphinium

Delphinium elatum

Ranunculaceae · flowers

Deer ResistantHigh Maintenance

Lupine

Lupinus polyphyllus

Fabaceae · flowers

Deer ResistantMedium Maintenance

Hardiness Zone Range

Delphinium (Zones 3-7)

Lupine (Zones 4-7)

Overlap: Both grow in zones 4–7

Detailed Comparison

Feature	Delphinium	Lupine
Scientific Name	Delphinium elatum	Lupinus polyphyllus
Family	Ranunculaceae	Fabaceae
Category	flowers	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Rich, Well-drained	Well-drained, Slightly Acidic
Height	6'	4'
Spread	2'	2'
Bloom Season	Early Summer	Late Spring-Summer
Bloom Color	Blue, Purple, White, Pink	Blue, Purple, Pink, Yellow
Growth Rate	Fast	Medium
Native Region	Europe, Asia	North America
Maintenance	High	Medium

Special Traits

Delphinium

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Lupine

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Care Tips

Delphinium

✓Stake tall varieties.
✓Cut back after first bloom for possible rebloom.
✓Needs cool summers — struggles in heat.
✓Slugs love young growth.
✓All parts are toxic.

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 Delphinium if you don't mind high maintenance, and want deer resistance. It thrives in full sun with medium water in zones 3–7.

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 DelphiniumProfile →View LupineProfile →

Frequently Asked Questions

Can Delphinium and Lupine grow in the same hardiness zone?

Delphinium grows in USDA zones 3-7, while Lupine grows in zones 4-7. Both plants can grow together in zones 4 through 7.

Do Delphinium and Lupine have the same sun and water needs?

Delphinium 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, Delphinium or Lupine?

Delphinium grows taller at 6' compared to Lupine at 4'. Delphinium spreads 2' while Lupine spreads 2'.

Are Delphinium and Lupine deer resistant?

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

Which is easier to maintain, Delphinium or Lupine?

Delphinium has high maintenance while Lupine has medium maintenance. Delphinium may be easier for beginning gardeners to manage.

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Detailed Comparison

Feature	Delphinium	Lupine
Scientific Name	Delphinium elatum	Lupinus polyphyllus
Family	Ranunculaceae	Fabaceae
Category	flowers	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Rich, Well-drained	Well-drained, Slightly Acidic
Height	6'	4'
Spread	2'	2'
Bloom Season	Early Summer	Late Spring-Summer
Bloom Color	Blue, Purple, White, Pink	Blue, Purple, Pink, Yellow
Growth Rate	Fast	Medium
Native Region	Europe, Asia	North America
Maintenance	High	Medium

Care Tips

Delphinium

✓Stake tall varieties.
✓Cut back after first bloom for possible rebloom.
✓Needs cool summers — struggles in heat.
✓Slugs love young growth.
✓All parts are toxic.

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 Delphinium if you don't mind high maintenance, and want deer resistance. It thrives in full sun with medium water in zones 3–7.

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 Delphinium and Lupine grow in the same hardiness zone?

Delphinium grows in USDA zones 3-7, while Lupine grows in zones 4-7. Both plants can grow together in zones 4 through 7.

Do Delphinium and Lupine have the same sun and water needs?

Delphinium 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, Delphinium or Lupine?

Delphinium grows taller at 6' compared to Lupine at 4'. Delphinium spreads 2' while Lupine spreads 2'.

Are Delphinium and Lupine deer resistant?

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

Which is easier to maintain, Delphinium or Lupine?

Delphinium has high maintenance while Lupine has medium maintenance. Delphinium may be easier for beginning gardeners to manage.