Onion Garden Onion, Common Onion

Allium cepa var. cepa

Onion belongs to the Allium genus. Onion is also known as Garden Onion, Common Onion

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The Onion Plant Wiki

All details in our wiki have been kindly provided by our members.

Plant taxonomists have divided onions (Allium cepa) into three groups, the Cepa Group (bulbing onions), the Aggregatum Group (shallots, multiplier onions, potato onions), and the Proliferum Group (top-setting onions, walking onions, Egyptian onions, tree onions).

Onion belongs to the Allium genus.

How to grow and keep Onion happy

How to sow and germinate Onion

How to transplant Onion

How to harvest Onion

Harvest onions when the tops turn yellow and begin to topple over. To dig them up, loosen the soil around each bulb and then lift them up carefully – make sure not to damage as they rot quickly. Spread them on a flat surface above the ground and leave to dry out – this will take anywhere from 2 to 10 days if left out side, or 2 weeks if taken inside. Cut the tops, and then store in mesh bags in a cool, well ventilated space.

Companion plants for Onion

These plants will grow well with Onion:

fruit trees, nightshades (tomatoes, peppers, potatoes, etc), brassicas (cabbage, broccoli, kohlrabi, etc) carrots ¹

Repellent plants for Onion

These plants will not grow well with Onion so avoid planting these within close proximity:

beans, peas, parsley ¹

Common Onion pests

These pests are known to attack Onion plants:

Common Onion diseases & problems

These problems and diseases are known to effect Onion plants:

How long does Onion take to grow?

These estimates for how long Onion takes to sprout, grow and harvest are from real observations from real gardeners, right around the world. Start logging and journaling your observations to participate!