Onion Growing Guide

Frequently Asked Questions

How long does it take to grow Onion?

Onion takes approximately 110 days from planting to harvest.

How much sun does Onion need?

Onion requires full sun (6+ hours direct sunlight per day).

How far apart should I plant Onion?

Plant Onion at 9/sqft (4" apart) using square foot gardening spacing.

Can Onion survive frost?

Onion is tolerant of moderate frost.

What are good companion plants for Onion?

Good companion plants for Onion include Strawberries, Cabbage, Beets, Lettuce, Carrots, Tomatoes. Avoid planting near Beans, Peas.

How long does Onion take to germinate?

Onion seeds germinate in 7-14 days at an optimal temperature of 70°F.

When should I start Onion seeds indoors?

Start Onion seeds indoors 10 weeks before your last frost date, then transplant -4 weeks after last frost.