Skip to content

How to grow onions

Allium cepa · amaryllidaceae family · annual crop

Allium cepa — hero (chairman regenerate)
AI-generated reference image. Have a photo of this plant? Suggest one below.

Growing basics

Onion is a cool-season crop, started from seed in the garden or transplanted.

Seeds germinate once soil reaches about 50°F.

Varieties in the library run 105 to 125 days to maturity.

Grows best in full sun.

Tolerates a light frost.

Space plants about 4 inches apart.

Sources

5 onions in the library

Vidalia · Red Wing · Walla Walla · Yellow Sweet Spanish · Borettana Cipollini

Each has a full cited page in the library.

Pests and diseases we cover

Identification and treatment for each, with photos, in the library.

Row & Bed covers 5 onion varieties, each with a cited care timeline and fertilization schedule, identification and treatment for the pest and 3 diseases that reach them, and planting windows worked out for your ZIP.

Set up your garden

See something that does not match your garden? Write to andy@rowandbed.com.