Leeks

Use our zone-based planting guide to know when to plant leeks.

Plant name Zone Start seeds indoors Start seeds outdoors Plant seedlings/transplants outdoors Plant spacing # plants per person
Leeks 3a Feb. 15-March 1 On/around May 15 (after last frost) On/around May 15 (after last frost) 6 inches 12-15
Leeks 3b Feb. 15-March 1 On/around May 15 (after last frost) On/around May 15 (after last frost) 6 inches 12-15
Leeks 4a Feb. 15-March 1 On/around May 15 (after last frost) On/around May 15 (after last frost) 6 inches 12-15
Leeks 4b Feb. 15-March 1 On/around May 15 (after last frost) On/around May 15 (after last frost) 6 inches 12-15
Leeks 5a Jan. 15-Feb. 1 On/around April 15 (after last frost) On/around April 15 (after last frost) 6 inches 12-15
Leeks 5b Jan. 15-Feb. 1 On/around April 15 (after last frost) On/around April 15 (after last frost) 6 inches 12-15
Leeks 6a Jan. 15-Feb. 1 On/around April 15 (after last frost) On/around April 15 (after last frost) 6 inches 12-15
Leeks 6b Jan. 15-Feb. 1 On/around April 15 (after last frost) On/around April 15 (after last frost) 6 inches 12-15
Leeks 7a Jan. 15-Feb. 1 On/around April 15 (after last frost) On/around April 15 (after last frost) 6 inches 12-15
Leeks 7b Jan. 15-Feb. 1 On/around April 15 (after last frost) On/around April 15 (after last frost) 6 inches 12-15
Leeks 8a Dec. 15-Jan. 1 On/around March 15 (after last frost) On/around March 15 (after last frost) 6 inches 12-15
Leeks 8b Dec. 15-Jan. 1 On/around March 15 (after last frost) On/around March 15 (after last frost) 6 inches 12-15
Leeks 9a September-November; March-April September-November; March-April September-November; March-April 6 inches 12-15
Leeks 9b September-November; March-April September-November; March-April September-November; March-April 6 inches 12-15
Leeks 10a September-December; February-April September-December; February-April September-December; February-April 6 inches 12-15
Leeks 10b September-December; February-April September-December; February-April September-December; February-April 6 inches 12-15
Leeks 11a September-April September-April September-April 6 inches 12-15
Leeks 11b September-April September-April September-April 6 inches 12-15

* Start seedlings indoors 10-12 weeks before last frost date. In warmer climates, leeks can be grown most of the winter.