Growing Onion

Allium cepa : Amaryllidaceae / the onion family

Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
	S
		P	P

(Best months for growing Onion in USA - Zone 5a regions)

S = Plant undercover in seed trays
P = Sow seed

Easy to grow. Grow in seed trays, and plant out in 4-6 weeks. Sow seed at a depth approximately three times the diameter of the seed. Best planted at soil temperatures between 46°F and 86°F. (Show °C/cm)
Space plants: 2 - 4 inches apart
Harvest in 25-34 weeks. Allow onions to dry before storing.
Compatible with (can grow beside): Lemon Balm, Borage, Carrots, Beets, Silverbeet, Lettuce, Amaranth
Avoid growing close to: Peas, Beans

Your comments and tips

17 Jun 22, Anonymous (Canada - Zone 4b Temperate Warm Summer climate): Go to the blue tab above and work out which zone you are. Pick what variety you want to grow.
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02 Jun 22, Rick Nuffer (USA - Zone 7a climate): do walla walla onions grow well in Utah?
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18 Apr 22, Graham Bower (Australia - temperate climate): I have been growing butternut pumpkin and trombone zucchini in close proximity and saving seed for following season. I saved seed from each for this seasons planting. This year my produce appears to be a cross of thes two . Is this possible? Can these cross pollinate? The fruit has been huge and eats very much like a quality butternut.
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21 Apr 22, Anonymous (Australia - temperate climate): I believe they do cross pollinate.
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26 Mar 22, Heidi (Australia - temperate climate): I have some onion sets left over from last year and want to plant them. All the articles I have seen thus far talk about growing them from seed/seedlings. Ours is a temperate climate, so when is a good time to plant them?
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19 Apr 22, Graham (Australia - temperate climate): Sets . Another word for seedlings. If they are still fresh and viable they should be OK. In saying that, I am surprised that they are still OK from last year. (Gardenate : 'sets' are usually small onion bulbs with brown, papery skin)
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29 Mar 22, Anonymous (Australia - sub-tropical climate): Check the top of the onion page.
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21 Feb 22, Narelle (Australia - tropical climate): Is Mackay too hot to grow onions? What's the best variety for up here? Thanks
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22 Feb 22, (Australia - tropical climate): Any variety.
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22 Feb 22, Anonymous of Bundaberg (Australia - tropical climate): Go to onion, set the climate zone to tropical and it will show you in the calendar guide. They take a long time to grow and are generally cheapish in shops.
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Replying to:

two questions. Which variety of onions and garlic are best for growth in Puerto Rico. were can I buy them and expect to get them to Puerto Rico. Many say they are not to be shipped to Puerto Rico(price for living in the colony). Thanks, C.Foy

- Clifford Foy

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Growing Onion

Allium cepa : Amaryllidaceae / the onion family

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