Leave 16 or more inches between rows. If planting seeds, seedlings should appear in 10 to 14 days. Plant 1/2 an inch deep for seeds or 2 to 3 inches deep for sets.

During warmer weather, water them frequently to prevent bolting. Plant carrots or tomatoes next to onions in tightly spaced rows to keep thrips away. Young onions can be harvested as scallions or ...