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

15 Jun 17, John (Australia - temperate climate): Onions like a good soil but do not like too much manure/fertiliser as it will cause soft growth which will be susceptible to fungal problems.
Reply or Post a new comment
02 Jun 17, (Australia - temperate climate): Hello, what does it mean when the onion doesn't form a proper onion bulb but the stem becomes thick. This happened to me last year after having a good crop the year before. Cheers
Reply or Post a new comment
13 Sep 17, Karin (Australia - temperate climate): I am having the same problem and I notice no-one has replied to the first person's question. The plant tops are thick and healthy, but there seems to be no onion bulb forming in the soil. Why is this and what can I do about it?
Reply or Post a new comment
13 Sep 17, kelvan (Australia - temperate climate): Old Italian method is to bend over the stalks to ground level
Reply or Post a new comment
07 May 17, jimmy (South Africa - Dry summer sub-tropical climate): may sell them while they're still green?
Reply or Post a new comment
07 May 17, (Australia - sub-tropical climate): Hello Jimmy, We need a bit more information. Do you want to sell the onions while they are small or when they are larger, before the tops die down. You can sell or eat onions at any stage but if the tops have not died down they will not keep very long.
Reply or Post a new comment
04 May 17, Paul (Australia - temperate climate): How deep do you plant the onion seedling if you buy a small tray from a garden centre or Bunnings?
Reply or Post a new comment
06 May 17, Sean (Australia - sub-tropical climate): Onion seedlings from punnets are usually very small.Make a V shaped trench abut 50 mm (2") deep and lay them along one side of the trench at recommended spacing (probably 100 mm (4") then carefully draw the soil from the other side of the trench over the base of the seedlings. This is best done on a cool overcast day or in the evening as a warm sunny day will stress the little seedlings too much. They might stay laying down for a few days but will soon be upright.
Reply or Post a new comment
22 Apr 17, Keikantseng (South Africa - Summer rainfall climate): I an staying in Taunton village in North west province. Can I plant onion in April?
Reply or Post a new comment
23 Apr 17, John (Australia - temperate climate): Yes you can. Long Keeping varieties can be sown now.
Reply or Post a new comment

Showing 201 - 210 of 371 comments

See comments for all plants

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

Your name

Where are you?

Email address

Please provide your email address if you are hoping for a reply

Your reply

All comments are reviewed before displaying on the site, so your posting will not appear immediately

Gardenate

Keep your garden growing - see what to plant right now

Growing Onion

Allium cepa : Amaryllidaceae / the onion family

Your comments and tips

Gardenate

Keep your garden growing - see what to plant right now

Growing Onion

Allium cepa : Amaryllidaceae / the onion family

Your comments and tips

Become A Supporter!

Planting Reminders