Storage Onion

Storage onions are selected for firm flesh and protective skins. Sound bulbs and complete curing are essential for long keeping.

Popular types

Choose the right day-length class.
Stop nitrogen when bulbs swell.
Let tops fall naturally.
Cure dry necks and exclude damaged bulbs from storage.
Start seed indoors 8-12 weeks before planting out, then set seedlings about 1 inch deep and 4 inches apart.
Keep shallow roots evenly moist with about 1 inch of water weekly and weed gently by hand.
Do not mound soil over swelling bulbs or bend the tops down to hasten maturity.
Watch for silvery leaf streaks and tiny thrips in leaf folds, and remove volunteer onions that harbor pests.
Stop watering when most tops fall naturally, then lift and cure storage varieties in a dry, airy place.

Use local planting dates for the cultivar’s day-length class.

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