Plant library
Vegetable
Onion
Allium cepa
Zones 3–10
A kitchen essential that stores for months and earns its keep in any garden.
Sun
Full sun
Water
moderate
Spacing
4-6 in apart
Soil
Rich, well-drained, pH 6.0-7.0
Difficulty
moderate
Zones
3–10
When to plant
Mar
Apr
Timing shifts with your zone — the Genie can pin down exact dates for you.
How to care for it
Grow from sets or transplants in early spring and weed well — shallow roots hate competition. Feed early, then stop as bulbs form. Keep evenly moist, then dry down near harvest.
Good companions
Carrot, tomato, lettuce, chamomile
Harvest
When tops fall over, lift bulbs and cure in the sun a few days.
Want a plan for growing Onion?
Your Genie can give exact timing and care for your zone.
