Growing Onion

Allium cepa : Amaryllidaceae / the onion family

Jan F M A M J J A S O N Dec
      S                
          T            

(Best months for growing Onion in Canada - Zone 3a Temperate Short Summer regions)

  • S = Plant undercover in seed trays
  • T = Plant out (transplant) seedlings
  • 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

30 Nov 23, (South Africa - Summer rainfall climate)
You could try but it does say Feb - April.
08 Sep 23, enie (South Africa - Summer rainfall climate)
is there onion variety that you can grow around November in south africa
14 Sep 23, Anonymous (South Africa - Semi-arid climate)
Check the planting guide - Dec onwards.
20 Aug 23, Michael (Australia - temperate climate)
Can you please tell me the best varieties of onion to plant now. Live at Canowindra NSW Thanking you
06 Sep 23, Anonymous (Australia - sub-tropical climate)
Which ever variety you prefer.
22 Jul 23, Joseph (South Africa - Summer rainfall climate)
Is it okay to plant Texas grano onions in August and September. I am in mpumalanga, South Africa
20 Jun 23, Sue (New Zealand - temperate climate)
My onions got a rusty fungus on the last year how do I guard against this happening again. I grew the multiplying onions found them in the garden centre as Welsh Onions. They were great until they developed the fungus.
24 Jun 23, jim (New Zealand - temperate climate)
Copper copper copper I had same problem last year onions,garlic and leeks sometimes gardening is a pain but I still do it ??? Remember to use a sticker "sprayfix" by yates is one but most garden chemical people do similar it helps to break down the surface tension so the spray does not just run off do it before it appears and repeat it several times during the season only problem with it raining constantly it's hard to do right now. P.S. my mum used to grow welsh onions in the UK when I was a boy never saw enything like rust ?
15 Apr 23, Mike (Canada - Zone 3a Temperate Short Summer climate)
Growing onions from seeds What kind should I grow? When? Can I start then before winter, or do I start the seeds in January indoors?
26 Apr 23, Erin (Canada - Zone 5b Temperate Warm Summer climate)
You need a long day onion, you can start seed ahead of time indoors, do not save seed packets, they're only good for a year.
Showing 21 - 30 of 369 comments

I have onions that need transplanting is it the right time, will appreciate the advice.

- Themba Peter

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


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

Gardenate App

Put Gardenate in your pocket. Get our app for iPhone, iPad or Android to add your own plants and record your plantings and harvests

Planting Reminders

Join 60,000+ gardeners who already use Gardenate and subscribe to the free Gardenate planting reminders email newsletter.


Home | Vegetables and herbs to plant | Climate zones | About Gardenate | Contact us | Privacy Policy

This planting guide is a general reference intended for home gardeners. We recommend that you take into account your local conditions in making planting decisions. Gardenate is not a farming or commercial advisory service. For specific advice, please contact your local plant suppliers, gardening groups, or agricultural department. The information on this site is presented in good faith, but we take no responsibility as to the accuracy of the information provided.
We cannot help if you are overrun by giant slugs.