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

22 May 20, Anonymous (South Africa - Summer rainfall climate): Gardenate suggests you plant Feb to April. Try planting it in August and it probably won't even germinate. Most plants have a defined time of the year to grow in a particular climate zone.
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12 May 20, Anon (South Africa - Semi-arid climate): Check the top of the page .
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08 Apr 20, Harpreet Kaur (New Zealand - cool/mountain climate): If you sow seeds of red onion indoor in April and wait till it can be transplanted outside..say in June.. Can it stay in the ground in cold winters harmlessly..n mature in summers to come around Christmas? Or will it die in cold weather buried in soil ?
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09 Apr 20, anonymous (New Zealand - cool/mountain climate): Go to cool/mountain NZ look up onion and look at the monthly calendar at the top of the page - read what S P &T mean and then apply that to your question.
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01 Apr 20, paul ryan (Australia - temperate climate): What do you mean by saying onion bulbs should sit on the soil and not be covered.
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03 Apr 20, Anon (Australia - sub-tropical climate): When an onion grows the bulb part sits on top of the soil, only the roots are in the soil. DO NOT hill the soil up over the bulb. Check on the internet and see.
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01 Apr 20, Kaz (USA - Zone 11b climate): Aloha What onions & tomatoes grow well in zone 11 Hawaii Ohau north shore
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25 Nov 19, William Rowe (USA - Zone 9b climate): What variety of onion do you suggest for my region. 9b Ocala,Fl
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26 Oct 19, Allan Kevin Marshall (Australia - cool/mountain climate): I sowed my Hunter River Brown seeds on the 1st of April in rows East & West I thinned them out & the thinnings I planted in a bed facing North & South .The thinnings are bolting to seed,& the ones planted in the East West are doing well. I live in Geelong Victoria,What could be the fault here with the planting North & South
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08 Dec 19, Susan in Canberra (Australia - temperate climate): Hi Allan, is it possible that the thinnings were stressed by being pulled out & replanted and this caused them to bolt ahead of the original plantings?
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Growing Onion

Allium cepa : Amaryllidaceae / the onion family

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