Sweet Pea vs Zinnia

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

Sweet Pea

Lathyrus odoratus

Fabaceae · flowers

Deer ResistantMedium Maintenance

Zinnia

Zinnia elegans

Asteraceae · flowers

Deer ResistantDrought TolerantLow Maintenance

Hardiness Zone Range

Sweet Pea (Zones 2-11)

Zinnia (Zones 2-11)

Overlap: Both grow in zones 2–11

Detailed Comparison

Feature	Sweet Pea	Zinnia
Scientific Name	Lathyrus odoratus	Zinnia elegans
Family	Fabaceae	Asteraceae
Category	flowers	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Rich, Well-drained	Well-drained
Height	6'	3'
Spread	1'	1'
Bloom Season	Spring-Summer	Summer-Fall
Bloom Color	Mixed	Mixed
Growth Rate	Fast	Fast
Native Region	Italy, Sicily	Mexico
Maintenance	Medium	Low

Special Traits

Sweet Pea

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Zinnia

No — EdibleYes — Deer ResistantYes — Drought Tolerant

Care Tips

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.

Zinnia

✓Direct sow after last frost — zinnias dislike transplanting.
✓Space for air circulation to prevent powdery mildew.
✓Deadhead for continuous bloom.

Which Plant Is Right for Your Garden?

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.

Choose Zinnia if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with medium water in zones 2–11.

Plant them together? Both overlap in zones 2–11. They share similar sun requirements (full sun), making them potential garden companions.

View Sweet PeaProfile →View ZinniaProfile →

Frequently Asked Questions

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

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

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

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

Which grows taller, Sweet Pea or Zinnia?

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

Are Sweet Pea and Zinnia deer resistant?

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

Which is easier to maintain, Sweet Pea or Zinnia?

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

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Detailed Comparison

Feature	Sweet Pea	Zinnia
Scientific Name	Lathyrus odoratus	Zinnia elegans
Family	Fabaceae	Asteraceae
Category	flowers	flowers
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Rich, Well-drained	Well-drained
Height	6'	3'
Spread	1'	1'
Bloom Season	Spring-Summer	Summer-Fall
Bloom Color	Mixed	Mixed
Growth Rate	Fast	Fast
Native Region	Italy, Sicily	Mexico
Maintenance	Medium	Low

Care Tips

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.

Zinnia

✓Direct sow after last frost — zinnias dislike transplanting.
✓Space for air circulation to prevent powdery mildew.
✓Deadhead for continuous bloom.

Which Plant Is Right for Your Garden?

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.

Choose Zinnia if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with medium water in zones 2–11.

Plant them together? Both overlap in zones 2–11. They share similar sun requirements (full sun), making them potential garden companions.

Frequently Asked Questions

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

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

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

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

Which grows taller, Sweet Pea or Zinnia?

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

Are Sweet Pea and Zinnia deer resistant?

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

Which is easier to maintain, Sweet Pea or Zinnia?

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