Onion vs Southern Magnolia

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

Onion

Allium cepa

Amaryllidaceae · vegetables

EdibleDeer ResistantLow Maintenance

Southern Magnolia

Magnolia grandiflora

Magnoliaceae · trees

Deer ResistantLow Maintenance

Hardiness Zone Range

Onion (Zones 3-9)

Southern Magnolia (Zones 7-10)

Overlap: Both grow in zones 7–9

Detailed Comparison

Feature	Onion	Southern Magnolia
Scientific Name	Allium cepa	Magnolia grandiflora
Family	Amaryllidaceae	Magnoliaceae
Category	vegetables	trees
Sun	☀️ Full Sun	☀️ Full Sun to Part Shade
Water	💧💧 Medium	💧💧 Medium
Soil	Rich, Well-drained	Rich, Well-drained, Acidic
Height	1' 6"	80'
Spread	4"	40'
Bloom Season	Summer	Late Spring-Summer
Bloom Color	White	White
Growth Rate	Medium	Medium
Native Region	Central Asia	Southeastern US
Maintenance	Low	Low

Special Traits

Onion

Yes — EdibleYes — Deer ResistantNo — Drought Tolerant

Southern Magnolia

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Care Tips

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.

Southern Magnolia

✓Protect from winter winds in northern range.
✓Give space for lower branches to sweep the ground.
✓Leaves are slow to decompose.
✓Large seed pods with red seeds.

Which Plant Is Right for Your Garden?

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.

Choose Southern Magnolia if you want a low-maintenance plant, and want deer resistance. It thrives in full sun to part shade with medium water in zones 7–10.

Plant them together? Both overlap in zones 7–9. However, they have different sun needs, so plan your garden layout carefully.

View OnionProfile →View Southern MagnoliaProfile →

Frequently Asked Questions

Can Onion and Southern Magnolia grow in the same hardiness zone?

Onion grows in USDA zones 3-9, while Southern Magnolia grows in zones 7-10. Both plants can grow together in zones 7 through 9.

Do Onion and Southern Magnolia have the same sun and water needs?

Onion needs full sun and medium water, while Southern Magnolia needs full sun to part shade and medium water. Their differing requirements mean you may need separate garden areas for each.

Which grows taller, Onion or Southern Magnolia?

Southern Magnolia grows taller at 80' compared to Onion at 1' 6". Southern Magnolia spreads 40' while Onion spreads 4".

Are Onion and Southern Magnolia deer resistant?

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

Which is easier to maintain, Onion or Southern Magnolia?

Both Onion and Southern Magnolia 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	Onion	Southern Magnolia
Scientific Name	Allium cepa	Magnolia grandiflora
Family	Amaryllidaceae	Magnoliaceae
Category	vegetables	trees
Sun	☀️ Full Sun	☀️ Full Sun to Part Shade
Water	💧💧 Medium	💧💧 Medium
Soil	Rich, Well-drained	Rich, Well-drained, Acidic
Height	1' 6"	80'
Spread	4"	40'
Bloom Season	Summer	Late Spring-Summer
Bloom Color	White	White
Growth Rate	Medium	Medium
Native Region	Central Asia	Southeastern US
Maintenance	Low	Low

Care Tips

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.

Southern Magnolia

✓Protect from winter winds in northern range.
✓Give space for lower branches to sweep the ground.
✓Leaves are slow to decompose.
✓Large seed pods with red seeds.

Which Plant Is Right for Your Garden?

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.

Choose Southern Magnolia if you want a low-maintenance plant, and want deer resistance. It thrives in full sun to part shade with medium water in zones 7–10.

Plant them together? Both overlap in zones 7–9. However, they have different sun needs, so plan your garden layout carefully.

Frequently Asked Questions

Can Onion and Southern Magnolia grow in the same hardiness zone?

Onion grows in USDA zones 3-9, while Southern Magnolia grows in zones 7-10. Both plants can grow together in zones 7 through 9.

Do Onion and Southern Magnolia have the same sun and water needs?

Onion needs full sun and medium water, while Southern Magnolia needs full sun to part shade and medium water. Their differing requirements mean you may need separate garden areas for each.

Which grows taller, Onion or Southern Magnolia?

Southern Magnolia grows taller at 80' compared to Onion at 1' 6". Southern Magnolia spreads 40' while Onion spreads 4".

Are Onion and Southern Magnolia deer resistant?

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

Which is easier to maintain, Onion or Southern Magnolia?

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