Butterfly Bush vs Sweet Pea

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

Butterfly Bush

Buddleja davidii

Scrophulariaceae · shrubs

Deer ResistantDrought TolerantLow Maintenance

Sweet Pea

Lathyrus odoratus

Fabaceae · flowers

Deer ResistantMedium Maintenance

Hardiness Zone Range

Butterfly Bush (Zones 5-9)

Sweet Pea (Zones 2-11)

Overlap: Both grow in zones 5–9

Detailed Comparison

Feature	Butterfly Bush	Sweet Pea
Scientific Name	Buddleja davidii	Lathyrus odoratus
Family	Scrophulariaceae	Fabaceae
Category	shrubs	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Well-drained	Rich, Well-drained
Height	10'	6'
Spread	8'	1'
Bloom Season	Summer-Fall	Spring-Summer
Bloom Color	Purple, Pink, White	Mixed
Growth Rate	Fast	Fast
Native Region	China	Italy, Sicily
Maintenance	Low	Medium

Special Traits

Butterfly Bush

No — EdibleYes — Deer ResistantYes — Drought Tolerant

Sweet Pea

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Care Tips

Butterfly Bush

✓Cut back to 12-18 inches in early spring — blooms on new wood.
✓Deadhead for continuous flowering.
✓Can be invasive — choose sterile cultivars.
✓Full sun essential.

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 Butterfly Bush if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with medium water in zones 5–9.

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 5–9. They share similar sun requirements (full sun), making them potential garden companions.

View Butterfly BushProfile →View Sweet PeaProfile →

Frequently Asked Questions

Can Butterfly Bush and Sweet Pea grow in the same hardiness zone?

Butterfly Bush grows in USDA zones 5-9, while Sweet Pea grows in zones 2-11. Both plants can grow together in zones 5 through 9.

Do Butterfly Bush and Sweet Pea have the same sun and water needs?

Butterfly Bush 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, Butterfly Bush or Sweet Pea?

Butterfly Bush grows taller at 10' compared to Sweet Pea at 6'. Butterfly Bush spreads 8' while Sweet Pea spreads 1'.

Are Butterfly Bush and Sweet Pea deer resistant?

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

Which is easier to maintain, Butterfly Bush or Sweet Pea?

Butterfly Bush has low maintenance while Sweet Pea has medium maintenance. Butterfly Bush may be easier for beginning gardeners to manage.

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Detailed Comparison

Feature	Butterfly Bush	Sweet Pea
Scientific Name	Buddleja davidii	Lathyrus odoratus
Family	Scrophulariaceae	Fabaceae
Category	shrubs	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Well-drained	Rich, Well-drained
Height	10'	6'
Spread	8'	1'
Bloom Season	Summer-Fall	Spring-Summer
Bloom Color	Purple, Pink, White	Mixed
Growth Rate	Fast	Fast
Native Region	China	Italy, Sicily
Maintenance	Low	Medium

Care Tips

Butterfly Bush

✓Cut back to 12-18 inches in early spring — blooms on new wood.
✓Deadhead for continuous flowering.
✓Can be invasive — choose sterile cultivars.
✓Full sun essential.

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 Butterfly Bush if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with medium water in zones 5–9.

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 5–9. They share similar sun requirements (full sun), making them potential garden companions.

Frequently Asked Questions

Can Butterfly Bush and Sweet Pea grow in the same hardiness zone?

Butterfly Bush grows in USDA zones 5-9, while Sweet Pea grows in zones 2-11. Both plants can grow together in zones 5 through 9.

Do Butterfly Bush and Sweet Pea have the same sun and water needs?

Butterfly Bush 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, Butterfly Bush or Sweet Pea?

Butterfly Bush grows taller at 10' compared to Sweet Pea at 6'. Butterfly Bush spreads 8' while Sweet Pea spreads 1'.

Are Butterfly Bush and Sweet Pea deer resistant?

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

Which is easier to maintain, Butterfly Bush or Sweet Pea?

Butterfly Bush has low maintenance while Sweet Pea has medium maintenance. Butterfly Bush may be easier for beginning gardeners to manage.