Choose a sunny location with well-drained soil
Loosen the soil and remove rocks, weeds, and debris
Mix in compost or aged manure
Sow onion seeds about 1/4 inch deep
Space seeds lightly in rows 12 to 18 inches apart
Cover seeds with fine soil and gently firm the surface
Water the area lightly but thoroughly
Keep the soil consistently moist until germination
Thin seedlings if they are overcrowded
Remove weeds regularly
Apply a light mulch to help retain moisture
Fertilize as needed during growth
Harvest when tops begin to yellow and fall over