Onion

Common Name: Onion

Scientific Name: Allium cepa

USDA Hardiness Zones: 3 to 10

Approximate number of seeds per gram (ounce) : 315 (9,000)

Sun: Full sun

Water: keep soil consistently moist during germination, do not overwater, but water regularly

Soil: cover lightly with well-drained, fertile soil

Temperature: 20 to 22 degrees Celsius (68 to 72 degrees Fahrenheit)

Spacing: space seeds 6 inches apart in rows about 2 feet apart

Germination Time: 4 to 10 days

The edible onion comes in two varieties, a short-day variety and a long-day variety. The short-day varieties are better suited to southern US climates and the long-day varieties to northern US climates. Seeds can be sown as soon as the ground is workable in early spring for an autumn crop. For a June crop, seeds should be sown in August of the prior year (mulch overwinter in zones 5 and lower).

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