Clematis vs Sweet Pea

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

Clematis

Clematis spp.

Ranunculaceae · vines

Deer ResistantMedium Maintenance

Sweet Pea

Lathyrus odoratus

Fabaceae · flowers

Deer ResistantMedium Maintenance

Hardiness Zone Range

Clematis (Zones 4-9)

Sweet Pea (Zones 2-11)

Overlap: Both grow in zones 4–9

Detailed Comparison

Feature	Clematis	Sweet Pea
Scientific Name	Clematis spp.	Lathyrus odoratus
Family	Ranunculaceae	Fabaceae
Category	vines	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Rich, Well-drained	Rich, Well-drained
Height	20'	6'
Spread	3'	1'
Bloom Season	Spring-Fall	Spring-Summer
Bloom Color	Purple, Blue, Pink, White	Mixed
Growth Rate	Medium	Fast
Native Region	Northern Hemisphere	Italy, Sicily
Maintenance	Medium	Medium

Special Traits

Clematis

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Sweet Pea

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Care Tips

Clematis

✓Keep roots cool and shaded, tops in sun.
✓Know your pruning group (1, 2, or 3).
✓Provide support for tendrils.
✓Mulch heavily.

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 Clematis if you don't mind medium maintenance, and want deer resistance. It thrives in full sun with medium water in zones 4–9.

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 4–9. They share similar sun requirements (full sun), making them potential garden companions.

View ClematisProfile →View Sweet PeaProfile →

Frequently Asked Questions

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

Clematis grows in USDA zones 4-9, while Sweet Pea grows in zones 2-11. Both plants can grow together in zones 4 through 9.

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

Clematis 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, Clematis or Sweet Pea?

Clematis grows taller at 20' compared to Sweet Pea at 6'. Clematis spreads 3' while Sweet Pea spreads 1'.

Are Clematis and Sweet Pea deer resistant?

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

Which is easier to maintain, Clematis or Sweet Pea?

Both Clematis 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	Clematis	Sweet Pea
Scientific Name	Clematis spp.	Lathyrus odoratus
Family	Ranunculaceae	Fabaceae
Category	vines	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Rich, Well-drained	Rich, Well-drained
Height	20'	6'
Spread	3'	1'
Bloom Season	Spring-Fall	Spring-Summer
Bloom Color	Purple, Blue, Pink, White	Mixed
Growth Rate	Medium	Fast
Native Region	Northern Hemisphere	Italy, Sicily
Maintenance	Medium	Medium

Care Tips

Clematis

✓Keep roots cool and shaded, tops in sun.
✓Know your pruning group (1, 2, or 3).
✓Provide support for tendrils.
✓Mulch heavily.

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 Clematis if you don't mind medium maintenance, and want deer resistance. It thrives in full sun with medium water in zones 4–9.

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 4–9. They share similar sun requirements (full sun), making them potential garden companions.

Frequently Asked Questions

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

Clematis grows in USDA zones 4-9, while Sweet Pea grows in zones 2-11. Both plants can grow together in zones 4 through 9.

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

Clematis 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, Clematis or Sweet Pea?

Clematis grows taller at 20' compared to Sweet Pea at 6'. Clematis spreads 3' while Sweet Pea spreads 1'.

Are Clematis and Sweet Pea deer resistant?

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

Which is easier to maintain, Clematis or Sweet Pea?

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