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 Jul 19, (Australia - sub-tropical climate): All plants need some nitrogen. Now if you put a lot of N on the onions, you would have a big green plant above the onion bulb and probably little bulb. N produces leaf and plant structure. Generally if you prepare your soil with compost manures etc and let it all rot in over 6-8 weeks with watering and digging it over, and maybe add a little general fert in the process then you would not have to fert the onions again. A general fert is sufficient to grow most things - look up and learn about crop rotation also.
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24 Jun 19, Cassie (Australia - cool/mountain climate): And make sure you plant varieties that cope with your particular climate. Many varieties dont cope well with heat and will bolt to seed
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08 Jun 19, Ben Camenzuli (Australia - sub-tropical climate): What is it that onions do not like as they grow ?? What is they like ? How to prevent onions going to seed ???
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10 Jun 19, (Australia - tropical climate): Too much N. Water them. Pick them before they seed.
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24 May 19, Yvonne Hermann (Australia - sub-tropical climate): I bought a large bag of salad(red) onions but due to unfortunate circumstances didn’t get use a lot of them. I now have approx 70 shooting onions. Can I plant these and will they produce new onions? How long from planting to harvesting & is now the right season in Queensland? Thanks in advance Yvonne
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18 Apr 19, SHIREEN WALTERS (South Africa - Summer rainfall climate): Can I plant spring onions and coriander now (middle April) ?
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29 Apr 20, Allimuthu Perumal 0329443959 (South Africa - Summer rainfall climate): Yes you can but try a tomato box size for coriander
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05 Mar 19, Carole (New Zealand - cool/mountain climate): When is the best time to plant red onion seeds and what sort of fertilizer should I use do u use lime?
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06 Mar 19, mike (New Zealand - cool/mountain climate): Best time to plant - read the top of the page. Fertiliser - one with not a high N content. Lime - read up about using lime.
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13 Feb 19, robert samuel walker (New Zealand - temperate climate): when is the best time to put in red onion in christchurch
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Growing Onion

Allium cepa : Amaryllidaceae / the onion family

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Ask a question or post a comment or advice about Onion

Gardenate

Keep your garden growing - see what to plant right now

Growing Onion

Allium cepa : Amaryllidaceae / the onion family

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