Growing Leeks

allium porrum : Amaryllidaceae / the onion family

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

(Best months for growing Leeks in USA - Zone 5a 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: 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

31 Aug 13, E (Australia - temperate climate)
I'm also in Melb. I've found things have started to pick up in the last few days due to the warmer weather, so your leeks may begin to improve. Aside from that, how is the soil that they're in? Is it dense, or loose? They really do seem to like loose soil as the leeks ends in my compost seem to attest.
18 Mar 13, Gayle (Australia - temperate climate)
What is meant by blanching the stems while the leek is growing.
22 Dec 13, Norma (Australia - temperate climate)
Blanching is hilling up around the stems with lucerne hay or something similar (news paper) which keep the stems light coloured and tender
20 Mar 13, Chris (Australia - cool/mountain climate)
Blanching means that the bottom of the stems end up white and edible, instead of going green and tough.
20 Mar 13, Kevin (Australia - temperate climate)
Gayle, it is the method of protecting the lower part of the stem from the sun . This results in a more tender stem when eaten! Different methods can be used suggest you google Stem Blanching and read our Brisbane Annette MacFarland article.
09 Feb 13, Maree (Australia - temperate climate)
If you plant your leeks in spring or late winter, they will tend to want to bolt to seed in the warmer months. I suggest planting them in autumn, and they will grow slowly through winter. They should be a good size when the warmer weather arrives, so you can then harvest them before they go to seed.
15 Jan 13, Mick (Australia - sub-tropical climate)
My leeks are into their 2nd year some nearing the end of their lifespan.Use cut and come again method. The extreme heat has sent some to seed., Keep weeds out, I grow clovers amongst em and put in plenty of mushroom compost in soil at start nothing else just water
15 Dec 12, Beverley (Australia - sub-tropical climate)
I have the same problem as Taryn, leeks small and flowering. Could anyone please comment and offer helpful suggestions.
03 Sep 13, Maurice (Australia - sub-tropical climate)
I used to have the same problem, apparently many types of leeks don't do so well in warmer areas. I now grow perennial leeks and they perform far better. I got mine from mudflower blogspot
10 Dec 12, taryn (Australia - sub-tropical climate)
my leks seem to have gone to flower before reaching a good width. are they still eatable?
Showing 51 - 60 of 102 comments

Read the notes here about growing it. It tells you when to plant and how long until harvest.

- Mike

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