Canna Lily vs Onion

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

Canna Lily

Canna × generalis

Cannaceae · flowers

EdibleLow Maintenance

Onion

Allium cepa

Amaryllidaceae · vegetables

EdibleDeer ResistantLow Maintenance

Hardiness Zone Range

Canna Lily (Zones 7-11)

Onion (Zones 3-9)

Overlap: Both grow in zones 7–9

Detailed Comparison

Feature	Canna Lily	Onion
Scientific Name	Canna × generalis	Allium cepa
Family	Cannaceae	Amaryllidaceae
Category	flowers	vegetables
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium to High	💧💧 Medium
Soil	Rich, Moist	Rich, Well-drained
Height	6'	1' 6"
Spread	2'	4"
Bloom Season	Summer-Fall	Summer
Bloom Color	Red, Orange, Yellow, Pink	White
Growth Rate	Fast	Medium
Native Region	Tropical Americas	Central Asia
Maintenance	Low	Low

Special Traits

Canna Lily

Yes — EdibleNo — Deer ResistantNo — Drought Tolerant

Onion

Yes — EdibleYes — Deer ResistantNo — Drought Tolerant

Care Tips

Canna Lily

✓Dig rhizomes before frost in cold climates.
✓Full sun and rich soil for best performance.
✓Keep well watered.
✓Divide overcrowded clumps in spring.

Onion

✓Match variety to your latitude — long-day for north, short-day for south.
✓Plant sets or transplants for easiest results.
✓Stop watering when tops fall over.
✓Cure for 2 weeks before storing.

Which Plant Is Right for Your Garden?

Choose Canna Lily if you want a low-maintenance plant. It thrives in full sun with medium to high water in zones 7–11.

Choose Onion if you want a low-maintenance plant, and want deer resistance. It thrives in full sun with medium water in zones 3–9.

Plant them together? Both overlap in zones 7–9. They share similar sun requirements (full sun), making them potential garden companions.

View Canna LilyProfile →View OnionProfile →

Frequently Asked Questions

Can Canna Lily and Onion grow in the same hardiness zone?

Canna Lily grows in USDA zones 7-11, while Onion grows in zones 3-9. Both plants can grow together in zones 7 through 9.

Do Canna Lily and Onion have the same sun and water needs?

Canna Lily needs full sun and medium to high water, while Onion needs full sun and medium water. Their differing requirements mean you may need separate garden areas for each.

Which grows taller, Canna Lily or Onion?

Canna Lily grows taller at 6' compared to Onion at 1' 6". Canna Lily spreads 2' while Onion spreads 4".

Are Canna Lily and Onion deer resistant?

Onion is deer resistant, but Canna Lily is not. If deer are a concern, Onion is the better choice, or protect Canna Lily with fencing.

Which is easier to maintain, Canna Lily or Onion?

Both Canna Lily and Onion have low 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	Canna Lily	Onion
Scientific Name	Canna × generalis	Allium cepa
Family	Cannaceae	Amaryllidaceae
Category	flowers	vegetables
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium to High	💧💧 Medium
Soil	Rich, Moist	Rich, Well-drained
Height	6'	1' 6"
Spread	2'	4"
Bloom Season	Summer-Fall	Summer
Bloom Color	Red, Orange, Yellow, Pink	White
Growth Rate	Fast	Medium
Native Region	Tropical Americas	Central Asia
Maintenance	Low	Low

Care Tips

Canna Lily

✓Dig rhizomes before frost in cold climates.
✓Full sun and rich soil for best performance.
✓Keep well watered.
✓Divide overcrowded clumps in spring.

Onion

✓Match variety to your latitude — long-day for north, short-day for south.
✓Plant sets or transplants for easiest results.
✓Stop watering when tops fall over.
✓Cure for 2 weeks before storing.

Which Plant Is Right for Your Garden?

Choose Canna Lily if you want a low-maintenance plant. It thrives in full sun with medium to high water in zones 7–11.

Choose Onion if you want a low-maintenance plant, and want deer resistance. It thrives in full sun with medium water in zones 3–9.

Plant them together? Both overlap in zones 7–9. They share similar sun requirements (full sun), making them potential garden companions.

Frequently Asked Questions

Can Canna Lily and Onion grow in the same hardiness zone?

Canna Lily grows in USDA zones 7-11, while Onion grows in zones 3-9. Both plants can grow together in zones 7 through 9.

Do Canna Lily and Onion have the same sun and water needs?

Canna Lily needs full sun and medium to high water, while Onion needs full sun and medium water. Their differing requirements mean you may need separate garden areas for each.

Which grows taller, Canna Lily or Onion?

Canna Lily grows taller at 6' compared to Onion at 1' 6". Canna Lily spreads 2' while Onion spreads 4".

Are Canna Lily and Onion deer resistant?

Onion is deer resistant, but Canna Lily is not. If deer are a concern, Onion is the better choice, or protect Canna Lily with fencing.

Which is easier to maintain, Canna Lily or Onion?

Both Canna Lily and Onion have low maintenance requirements. They need a similar level of care including regular attention to watering, pruning, and soil health.