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Red Onion

Allium cepa Red, Amaryllidaceae

Zones
3a–10b
Layer
Root
Lifespan
Annual
Growth
Moderate

Guild Roles

ProducerPest Confuser

Growing Conditions

Sun

Full Sun (optimal)

Water

Moderate

Soil pH

6 – 7

Tolerances

Drought
Frost
Heat
Pest Resistance
Disease Resist.

Companion Plants

Hubbard SquashCucurbita maxima Hubbard
Pest DeterrentBeneficial Insect Habitat

Antagonistic Plants

Yellow OnionAllium cepa Yellow

Same species varieties compete intensely for root space and may exhibit allelopathic effects

Uses

Functions

Food

Edible Parts

Roots

Common Questions

What zones does Red Onion grow in?

Red Onion grows in USDA hardiness zones 3a through 10b.

What are good companion plants for Red Onion?

Good companions for Red Onion include Hubbard Squash.

Design guilds with Red Onion and see companion relationships visually.

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