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Growing Leeks

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

(Best months for growing Leeks in New Zealand - cool/mountain 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: 4 - 8 inches apart
  • Harvest in 15-18 weeks. Loosen with a fork rather than pull by hand..
  • Compatible with (can grow beside): Carrots

Your comments and tips

04 Dec 18, Mike (Australia - sub-tropical climate)
Read the notes here about growing it. It tells you when to plant and how long until harvest.
10 Nov 18, Leeanne newnam (Australia - temperate climate)
When do leeks go in and how long till they harvest, is it summer or winter?
12 Nov 18, Mike (Australia - temperate climate)
Read the notes here - it is all there. I'd suggest you plant them in Autumn and pick them about 5 mths later.
10 Sep 18, Gail (Australia - sub-tropical climate)
When do I plant leeks on the mid North coast?
25 Sep 18, Graham (Australia - temperate climate)
I planted leeks in April at wauchope on the mid north coast and they were slow at first but have done very well since. We had plenty of frosts in July and August however this didn’t seem to effect them.
11 Sep 18, Mike (Australia - sub-tropical climate)
Go back to the leek page, set your climate to sub tropical - then look at the year monthly calendar - S plant seeds - T transplant seedlings.
17 Nov 17, Norma (Australia - temperate climate)
I am just starting to harvest my leeks and I notice there are little baby leek shoots at the base of the leek. Will these grow into proper leeks? I have been putting the whole base of the old leek back into the ground and the tiny shoot grows very quickly but I am not sure if it will be a proper new leek.
20 Nov 17, Mike (Australia - cool/mountain climate)
I know nothing about growing leeks. If you can keep some roots with the little shoots then they should grow. It is now plant time for leeks. Or put the little shoots in water and see if they start producing roots and then plant out. The old plant should grow. Google it - growing from old plants - leeks carrots etc. .
28 Oct 17, Jason (Australia - temperate climate)
G,day gardeners, I was given a bunch of small leeks about 6 months ago which was mid winter here in South Australia. I didn't know anything about leeks so I just separated them and planted in a small ditch. They are now 2 to 3 feet tall and have shot a tall stem up with a bulb on the top of it. I have tried to find out when to harvest them but can't find any clear instructions on this. My question is, does the appearance of this bulb mean they are turning to seed ? Do I need to pull them now or can I leave them growing ? Any info would be appreciated, thank you.
30 Oct 17, Mike (Australia - sub-tropical climate)
"When leeks have gone to seed, they become tough and inedible. Below you will find some tips on stopping the leek flowering or bolting. Why a Leek Plant Flowers and Bolts. When many plants bolt or go to seed, like broccoli or basil, it is due to warm temperatures. With leeks, it’s different. When leeks go to seed, it is normally due to being exposed to optimal temperatures followed by cold temperatures. In other words, a leek flowering is due to cold weather, not warm weather. When a leek flowers, it causes the neck or lower stem of the leek to become woody and tough and the leek will become bitter. While you can technically still eat leeks are gone to seed, you probably won’t like the flavor". Leeks take about 100-120 days to grow - so if you planted in mid winter (July 14th) it is now 3 1/2 mths - 100+ days - suggestion, pull them out if they look nice and tender - if looking woody, you have left it too late.
Showing 11 - 20 of 112 comments

Sounds like you planted them late in the season. Look at the guide here - maybe plant seed March and transplant 4-6 weeks later. Then harvest 11-13 weeks later. They should look like a leek not garlic. Do some research on the internet - how to grow leeks.

- Mike

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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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