Choose a sunny location with well-drained soil
Prepare the soil by loosening it and removing rocks and weeds
Mix in compost or well-rotted organic matter
Select onion sets, transplants, or seeds
Plant onions in early spring or according to your climate
Space plants properly to allow bulb development
Plant shallowly, with the roots covered and the tops exposed
Water regularly to keep soil evenly moist
Keep the bed weed-free throughout the growing season
Apply mulch to help retain moisture and suppress weeds
Feed with a balanced fertilizer if needed
Avoid overwatering to prevent rot
Harvest green onions when they are young and tender
Harvest bulb onions when the tops fall over and begin to dry
Cure harvested onions in a dry, airy place
Store cured onions in a cool, dry, dark location