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Growing Onion

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

(Best months for growing Onion in New Zealand - cool/mountain 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 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

04 Dec 17, andrew heaps (New Zealand - temperate climate)
hi,my onions have thick stalks just above the onions them selves.is that normal?and if not what is the remedy?
29 Oct 18, hamish (New Zealand - cool/mountain climate)
more than likely planted a little too deeply at start warm regards hamish
11 Apr 17, nik (New Zealand - temperate climate)
I planted 50 red onion seedling last year and they all split into 3 or 4 more like shallots, so after 6 months I gave up and pulled them out What went wrong ? there is no red shallot variety is there?
11 Apr 17, John (Australia - sub-tropical climate)
Onions are like daffodils and other bulbs in that they will grow extra bulbs as a form of multiplication. This can be caused by planting at the wrong time of the year for the variety. Check this on the seed packet and plant accordingly. Sadly nurseries sometimes sell 'out of season 'plants that look good. Tomatoes are a classic example with many plants sold after a few sunny days in late Winter or Early Spring. Trust this helps.
07 Jan 17, john timea (New Zealand - sub-tropical climate)
Hello my name is john timea .I am from Papua new guinea highlands and iam interested in growing blub brown onion.please advise what variety will I grow.thank you. john timea.
09 Jan 17, John (Australia - temperate climate)
It would take a lot of time to cover onion grwing in New Guinea. I suggest you Google 'onion growing in New Guinea as there is some quite good articles. Bulb onions grow well in the lowland areas but fungal problems are a consideratio everywhere. These articles may give you some clues as to what varieties to grow. Trust this helps.
25 May 16, Colin Campbell (New Zealand - temperate climate)
I planted onion seedlings 2 months ago. They all look healthy but I am concerned at the length of the tops--up to 30cm--which is causing some lifting of the bulb. Should I trim the tops back or leave as is? Your advice would be appreciated. Thank you.
05 Nov 11, wes (New Zealand - sub-tropical climate)
We grew white onoins & have just harvested & are now drying in the sun. How long should they be dried ? Is it better to leave the tops on or should they be cut off to speed drying? Regards,wes.
Showing 11 - 18 of 18 comments

hi,my onions have thick stalks just above the onions them selves.is that normal?and if not what is the remedy?

- andrew heaps

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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. GardenGrow 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.
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