When to Plant Leeks in New Hampshire
New Hampshire spans USDA hardiness 4a to 6b (zones 4a to 6b on this page). Plant leeks by your local frost date, not the calendar — pick your zone below for exact start-indoors, transplant, and harvest dates.
Jump to: Zone 4a · Zone 4b · Zone 5a · Zone 5b · Zone 6a · Zone 6b
Leeks planting calendar for New Hampshire, Zone 4a
Average last spring frost
May 15
Average first fall frost
September 20
Direct sow
Nov 14
Projected first harvest
Jul 12
Most leeks mature in about 130 to 240 days depending on the variety. Full zone 4 guide (both 4a and 4b) →
Leeks planting calendar for New Hampshire, Zone 4b
Average last spring frost
May 10
Average first fall frost
September 25
Direct sow
Nov 9
Projected first harvest
Jul 7
Most leeks mature in about 130 to 240 days depending on the variety. Full zone 4 guide (both 4a and 4b) →
Leeks planting calendar for New Hampshire, Zone 5a
Average last spring frost
May 5
Average first fall frost
October 1
Direct sow
Nov 4
Projected first harvest
Jul 2
Most leeks mature in about 130 to 240 days depending on the variety. Full zone 5 guide (both 5a and 5b) →
Leeks planting calendar for New Hampshire, Zone 5b
Average last spring frost
April 30
Average first fall frost
October 5
Direct sow
Oct 30
Projected first harvest
Jun 27
Most leeks mature in about 130 to 240 days depending on the variety. Full zone 5 guide (both 5a and 5b) →
Leeks planting calendar for New Hampshire, Zone 6a
Average last spring frost
April 25
Average first fall frost
October 10
Direct sow
Oct 25
Projected first harvest
Jun 22
Most leeks mature in about 130 to 240 days depending on the variety. Full zone 6 guide (both 6a and 6b) →
Leeks planting calendar for New Hampshire, Zone 6b
Average last spring frost
April 20
Average first fall frost
October 15
Direct sow
Oct 20
Projected first harvest
Jun 17
Most leeks mature in about 130 to 240 days depending on the variety. Full zone 6 guide (both 6a and 6b) →
Not sure which half-zone you're in? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
2 varieties of leeks in the HomeSown library. Tap any for its full grow guide.
Common problems with leeks
What to watch for, with identification and treatment for each
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