Growing Onion

Allium cepa : Amaryllidaceae / the onion family

Feb	Apr	May	Jun	Aug
S			S
	T	T		T
		P

(Best months for growing Onion in Australia - sub-tropical regions)

S = Plant undercover in seed trays
T = Plant out (transplant) seedlings
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 8°C and 30°C. (Show °F/in)
Space plants: 5 - 10 cm 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

01 Dec 17, Mike (Australia - temperate climate): Read what it says above - it tells you.
Reply or Post a new comment
14 Nov 17, rob (Australia - temperate climate): onions are going to seed . Should I pick now or wait till they brown
Reply or Post a new comment
20 Nov 17, Mike (Australia - cool/mountain climate): In future pick before they seed or when you first see them starting to seed.
Reply or Post a new comment
15 Nov 17, Mike (Australia - sub-tropical climate): Pick them and then leave in the sun for a few days to brown off.
Reply or Post a new comment
03 Jul 17, Paris (Australia - cool/mountain climate): I'm about to start growing onions from seeds and it says keep them under cover until early spring when they are ready to be planted out, I'm just wondering exactly what undercover means. Does it mean inside undercover or just out of direct sunlight outside. "Undercover" is very vague and I don't want to mess these up.
Reply or Post a new comment
04 Jul 17, Liz (New Zealand - sub-tropical climate): When we say 'undercover', we mean somewhere which will not have extremes of temperature and cool down at night. e.g on a covered deck : or in a cool greenhouse.
Reply or Post a new comment
12 Jun 17, Margaret Shaw (Australia - temperate climate): I have planted about 100 spring onions about 2 wks. ago, all looking good, do they benefit from any fertiliser during the growing period. I dug in a small amount of compost before planting. Thanking you, Margaret.
Reply or Post a new comment
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

Showing 61 - 70 of 193 comments

See comments for all plants

Ask a question or post a comment or advice about Onion

Your name

Where are you?

Email address

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

Your question, comment or advice

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

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

Your comments and tips

Ask a question or post a comment or advice about Onion

Become A Supporter!

Planting Reminders