When to Plant Mint in New Hampshire
New Hampshire spans USDA hardiness 4a to 6b (zones 4a to 6b on this page). Plant mint 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
Mint planting calendar for New Hampshire, Zone 4a
Average last spring frost
May 15
Average first fall frost
September 20
Direct sow
May 29
Projected first harvest
Jul 28
Most mint mature in about 60 days. Full zone 4 guide (both 4a and 4b) →
Mint planting calendar for New Hampshire, Zone 4b
Average last spring frost
May 10
Average first fall frost
September 25
Direct sow
May 24
Projected first harvest
Jul 23
Most mint mature in about 60 days. Full zone 4 guide (both 4a and 4b) →
Mint planting calendar for New Hampshire, Zone 5a
Average last spring frost
May 5
Average first fall frost
October 1
Direct sow
May 19
Projected first harvest
Jul 18
Most mint mature in about 60 days. Full zone 5 guide (both 5a and 5b) →
Mint planting calendar for New Hampshire, Zone 5b
Average last spring frost
April 30
Average first fall frost
October 5
Direct sow
May 14
Projected first harvest
Jul 13
Most mint mature in about 60 days. Full zone 5 guide (both 5a and 5b) →
Mint planting calendar for New Hampshire, Zone 6a
Average last spring frost
April 25
Average first fall frost
October 10
Direct sow
May 9
Projected first harvest
Jul 8
Most mint mature in about 60 days. Full zone 6 guide (both 6a and 6b) →
Mint planting calendar for New Hampshire, Zone 6b
Average last spring frost
April 20
Average first fall frost
October 15
Direct sow
May 4
Projected first harvest
Jul 3
Most mint mature in about 60 days. 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
7 varieties of mint in the HomeSown library. Tap any for its full grow guide.
Common problems with mint
What to watch for, with identification and treatment for each
🌱 Grow mint with a calendar built for your exact yard
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