Lupine vs Sweet Pea

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

Lupine

Lupinus polyphyllus

Fabaceae · flowers

Deer ResistantMedium Maintenance

Sweet Pea

Lathyrus odoratus

Fabaceae · flowers

Deer ResistantMedium Maintenance

Hardiness Zone Range

Lupine (Zones 4-7)

Sweet Pea (Zones 2-11)

Overlap: Both grow in zones 4–7

Detailed Comparison

Feature	Lupine	Sweet Pea
Scientific Name	Lupinus polyphyllus	Lathyrus odoratus
Family	Fabaceae	Fabaceae
Category	flowers	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Well-drained, Slightly Acidic	Rich, Well-drained
Height	4'	6'
Spread	2'	1'
Bloom Season	Late Spring-Summer	Spring-Summer
Bloom Color	Blue, Purple, Pink, Yellow	Mixed
Growth Rate	Medium	Fast
Native Region	North America	Italy, Sicily
Maintenance	Medium	Medium

Special Traits

Lupine

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Sweet Pea

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Care Tips

Lupine

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

Sweet Pea

✓Soak seeds overnight before planting.
✓Provide trellis or netting.
✓Pick flowers frequently to prolong bloom.
✓Needs cool weather — plant early spring or fall in warm areas.

Which Plant Is Right for Your Garden?

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.

Choose Sweet Pea if you don't mind medium maintenance, and want deer resistance. It thrives in full sun with medium water in zones 2–11.

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

View LupineProfile →View Sweet PeaProfile →

Frequently Asked Questions

Can Lupine and Sweet Pea grow in the same hardiness zone?

Lupine grows in USDA zones 4-7, while Sweet Pea grows in zones 2-11. Both plants can grow together in zones 4 through 7.

Do Lupine and Sweet Pea have the same sun and water needs?

Lupine needs full sun and medium water, while Sweet Pea needs full sun and medium water. They share similar growing requirements and can be planted in the same bed.

Which grows taller, Lupine or Sweet Pea?

Sweet Pea grows taller at 6' compared to Lupine at 4'. Sweet Pea spreads 1' while Lupine spreads 2'.

Are Lupine and Sweet Pea deer resistant?

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

Which is easier to maintain, Lupine or Sweet Pea?

Both Lupine and Sweet Pea have medium 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	Lupine	Sweet Pea
Scientific Name	Lupinus polyphyllus	Lathyrus odoratus
Family	Fabaceae	Fabaceae
Category	flowers	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Well-drained, Slightly Acidic	Rich, Well-drained
Height	4'	6'
Spread	2'	1'
Bloom Season	Late Spring-Summer	Spring-Summer
Bloom Color	Blue, Purple, Pink, Yellow	Mixed
Growth Rate	Medium	Fast
Native Region	North America	Italy, Sicily
Maintenance	Medium	Medium

Care Tips

Lupine

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

Sweet Pea

✓Soak seeds overnight before planting.
✓Provide trellis or netting.
✓Pick flowers frequently to prolong bloom.
✓Needs cool weather — plant early spring or fall in warm areas.

Which Plant Is Right for Your Garden?

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.

Choose Sweet Pea if you don't mind medium maintenance, and want deer resistance. It thrives in full sun with medium water in zones 2–11.

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 Lupine and Sweet Pea grow in the same hardiness zone?

Lupine grows in USDA zones 4-7, while Sweet Pea grows in zones 2-11. Both plants can grow together in zones 4 through 7.

Do Lupine and Sweet Pea have the same sun and water needs?

Lupine needs full sun and medium water, while Sweet Pea needs full sun and medium water. They share similar growing requirements and can be planted in the same bed.

Which grows taller, Lupine or Sweet Pea?

Sweet Pea grows taller at 6' compared to Lupine at 4'. Sweet Pea spreads 1' while Lupine spreads 2'.

Are Lupine and Sweet Pea deer resistant?

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

Which is easier to maintain, Lupine or Sweet Pea?

Both Lupine and Sweet Pea have medium maintenance requirements. They need a similar level of care including regular attention to watering, pruning, and soil health.