Mild onion flavor; mound soil around stems as they grow to blanch and extend edible shank
Select your zone to highlight your exact planting dates. Dates are calculated from each zone's average frost dates.
| Zone | Last Frost | Start Indoors | Transplant | Direct Sow |
|---|---|---|---|---|
| Zone 2A | May 30 | Mar 21 | May 2 | — |
| Zone 3B | May 15 | Mar 6 | Apr 17 | — |
| Zone 4A | May 8 | Feb 27 | Apr 10 | — |
| Zone 4B | May 1 | Feb 20 | Apr 3 | — |
| Zone 5A | Apr 25 | Feb 14 | Mar 28 | — |
| Zone 5B | Apr 18 | Feb 7 | Mar 21 | — |
| Zone 6A | Apr 21 | Feb 10 | Mar 24 | — |
| Zone 6B | Apr 10 | Jan 30 | Mar 13 | — |
| Zone 7A | Apr 5 | Jan 25 | Mar 8 | — |
| Zone 7B | Mar 28 | Jan 17 | Feb 28 | — |
| Zone 8A | Mar 20 | Jan 9 | Feb 20 | — |
| Zone 8B | Mar 12 | Jan 1 | Feb 12 | — |
| Zone 9A | Feb 28 | Dec 20 | Jan 31 | — |
| Zone 9B | Feb 15 | Dec 7 | Jan 18 | — |
| Zone 10A | Feb 1 | Nov 23 | Jan 4 | — |
| Zone 10B | Jan 15 | Nov 6 | Dec 18 | — |
| Zone 11A | Jan 1 | Oct 23 | Dec 4 | — |
Leeks are the mildest, most cold-hardy member of the allium family. They can overwinter in the ground in zones 5+ and provide harvests well into winter when other crops have finished.
Good companions: carrots, celery, onions, brassicas
Avoid planting near: legumes (beans, peas)
100-120 days from transplant; harvest when shank is 1 inch or more in diameter