When to plant leeks in zone 3

Leeks in USDA zone 3

Average zone 3 frost dates: last spring frost ≈ May 20, first fall frost ≈ Sep 15 (118 frost-free days). Local dates can vary by 2-3 weeks.

Start indoors early; hill soil around stems for long white shanks.

When to plant leeks in zone 3?

Start seeds indoors: Mar 11 – Mar 25; Transplant outdoors: May 6 – May 27; Expected first harvest: from Sep 3.

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