Onion vs Plum Tree

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

Onion

Allium cepa

Amaryllidaceae · vegetables

EdibleDeer ResistantLow Maintenance

Plum Tree

Prunus domestica

Rosaceae · trees

EdibleMedium Maintenance

Hardiness Zone Range

Onion (Zones 3-9)

Plum Tree (Zones 4-8)

Overlap: Both grow in zones 4–8

Detailed Comparison

Feature	Onion	Plum Tree
Scientific Name	Allium cepa	Prunus domestica
Family	Amaryllidaceae	Rosaceae
Category	vegetables	trees
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Rich, Well-drained	Rich, Well-drained
Height	1' 6"	25'
Spread	4"	20'
Bloom Season	Summer	Spring
Bloom Color	White	White
Growth Rate	Medium	Medium
Native Region	Central Asia	Europe, Western Asia
Maintenance	Low	Medium

Special Traits

Onion

Yes — EdibleYes — Deer ResistantNo — Drought Tolerant

Plum Tree

Yes — EdibleNo — 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.

Plum Tree

✓Most need cross-pollination — plant compatible varieties.
✓Thin fruits to 4-6 inches apart.
✓Prune in summer to reduce disease.
✓Brown rot is the main disease concern.

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 Plum Tree if you don't mind medium maintenance. It thrives in full sun with medium water in zones 4–8.

Plant them together? Both overlap in zones 4–8. They share similar sun requirements (full sun), making them potential garden companions.

View OnionProfile →View Plum TreeProfile →

Frequently Asked Questions

Can Onion and Plum Tree grow in the same hardiness zone?

Onion grows in USDA zones 3-9, while Plum Tree grows in zones 4-8. Both plants can grow together in zones 4 through 8.

Do Onion and Plum Tree have the same sun and water needs?

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

Which grows taller, Onion or Plum Tree?

Plum Tree grows taller at 25' compared to Onion at 1' 6". Plum Tree spreads 20' while Onion spreads 4".

Are Onion and Plum Tree deer resistant?

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

Which is easier to maintain, Onion or Plum Tree?

Onion has low maintenance while Plum Tree has medium maintenance. Onion may be easier for beginning gardeners to manage.

Explore More Data Tools

For adjacent public-data tools, methodology notes, and network updates, visit DataPeek Facts.

Detailed Comparison

Feature	Onion	Plum Tree
Scientific Name	Allium cepa	Prunus domestica
Family	Amaryllidaceae	Rosaceae
Category	vegetables	trees
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Rich, Well-drained	Rich, Well-drained
Height	1' 6"	25'
Spread	4"	20'
Bloom Season	Summer	Spring
Bloom Color	White	White
Growth Rate	Medium	Medium
Native Region	Central Asia	Europe, Western Asia
Maintenance	Low	Medium

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.

Plum Tree

✓Most need cross-pollination — plant compatible varieties.
✓Thin fruits to 4-6 inches apart.
✓Prune in summer to reduce disease.
✓Brown rot is the main disease concern.

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 Plum Tree if you don't mind medium maintenance. It thrives in full sun with medium water in zones 4–8.

Plant them together? Both overlap in zones 4–8. They share similar sun requirements (full sun), making them potential garden companions.

Frequently Asked Questions

Can Onion and Plum Tree grow in the same hardiness zone?

Onion grows in USDA zones 3-9, while Plum Tree grows in zones 4-8. Both plants can grow together in zones 4 through 8.

Do Onion and Plum Tree have the same sun and water needs?

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

Which grows taller, Onion or Plum Tree?

Plum Tree grows taller at 25' compared to Onion at 1' 6". Plum Tree spreads 20' while Onion spreads 4".

Are Onion and Plum Tree deer resistant?

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

Which is easier to maintain, Onion or Plum Tree?

Onion has low maintenance while Plum Tree has medium maintenance. Onion may be easier for beginning gardeners to manage.