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).

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

Onion is tolerant of moderate frost.

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

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

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

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Allium family

Days to Harvest110 days

SunlightFull Sun

Frost ToleranceModerate

Spacing9/sqft (4" apart)

Germination7-14 days

HardinessHardy

Germ. Temp70°F

Start Indoors10 weeks before last frost

BeansPeas

Track Onion from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.