Garlic vs Onion

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

Garlic

Allium sativum

Amaryllidaceae · vegetables

EdibleDeer ResistantLow Maintenance

Onion

Allium cepa

Amaryllidaceae · vegetables

EdibleDeer ResistantLow Maintenance

Hardiness Zone Range

Garlic (Zones 3-8)

Onion (Zones 3-9)

Overlap: Both grow in zones 3–8

Detailed Comparison

Feature	Garlic	Onion
Scientific Name	Allium sativum	Allium cepa
Family	Amaryllidaceae	Amaryllidaceae
Category	vegetables	vegetables
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Rich, Well-drained	Rich, Well-drained
Height	2'	1' 6"
Spread	6"	4"
Bloom Season	Summer	Summer
Bloom Color	White, Pink	White
Growth Rate	Medium	Medium
Native Region	Central Asia	Central Asia
Maintenance	Low	Low

Special Traits

Garlic

Yes — EdibleYes — Deer ResistantNo — Drought Tolerant

Onion

Yes — EdibleYes — Deer ResistantNo — Drought Tolerant

Care Tips

Garlic

✓Plant in fall, 4-6 weeks before ground freezes.
✓Break heads into individual cloves — plant pointy end up.
✓Mulch heavily.
✓Harvest when lower leaves brown.

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 Garlic if you want a low-maintenance plant, and want deer resistance. It thrives in full sun with medium water in zones 3–8.

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 3–8. They share similar sun requirements (full sun), making them potential garden companions.

View GarlicProfile →View OnionProfile →

Frequently Asked Questions

Can Garlic and Onion grow in the same hardiness zone?

Garlic grows in USDA zones 3-8, while Onion grows in zones 3-9. Both plants can grow together in zones 3 through 8.

Do Garlic and Onion have the same sun and water needs?

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

Which grows taller, Garlic or Onion?

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

Are Garlic and Onion deer resistant?

Yes, both Garlic and Onion are considered deer resistant, making them excellent choices for gardens in areas with deer pressure.

Which is easier to maintain, Garlic or Onion?

Both Garlic 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	Garlic	Onion
Scientific Name	Allium sativum	Allium cepa
Family	Amaryllidaceae	Amaryllidaceae
Category	vegetables	vegetables
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Rich, Well-drained	Rich, Well-drained
Height	2'	1' 6"
Spread	6"	4"
Bloom Season	Summer	Summer
Bloom Color	White, Pink	White
Growth Rate	Medium	Medium
Native Region	Central Asia	Central Asia
Maintenance	Low	Low

Care Tips

Garlic

✓Plant in fall, 4-6 weeks before ground freezes.
✓Break heads into individual cloves — plant pointy end up.
✓Mulch heavily.
✓Harvest when lower leaves brown.

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 Garlic if you want a low-maintenance plant, and want deer resistance. It thrives in full sun with medium water in zones 3–8.

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 3–8. They share similar sun requirements (full sun), making them potential garden companions.

Frequently Asked Questions

Can Garlic and Onion grow in the same hardiness zone?

Garlic grows in USDA zones 3-8, while Onion grows in zones 3-9. Both plants can grow together in zones 3 through 8.

Do Garlic and Onion have the same sun and water needs?

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

Which grows taller, Garlic or Onion?

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

Are Garlic and Onion deer resistant?

Yes, both Garlic and Onion are considered deer resistant, making them excellent choices for gardens in areas with deer pressure.

Which is easier to maintain, Garlic or Onion?

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