When to Plant Radishes in New Hampshire
New Hampshire spans USDA hardiness 4a to 6b (zones 4a to 6b on this page). Plant radishes 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
Radishes planting calendar for New Hampshire, Zone 4a
Average last spring frost
May 15
Average first fall frost
September 20
spring planting
Direct sow
May 1
Projected first harvest
Jun 30
fall planting
Direct sow
Jul 26
Projected first harvest
Sep 24
spring planting
fall planting
Most radishes mature in about 24 to 60 days depending on the variety. Full zone 4 guide (both 4a and 4b) →
Radishes planting calendar for New Hampshire, Zone 4b
Average last spring frost
May 10
Average first fall frost
September 25
spring planting
Direct sow
Apr 26
Projected first harvest
Jun 25
fall planting
Direct sow
Jul 31
Projected first harvest
Sep 29
spring planting
fall planting
Most radishes mature in about 24 to 60 days depending on the variety. Full zone 4 guide (both 4a and 4b) →
Radishes planting calendar for New Hampshire, Zone 5a
Average last spring frost
May 5
Average first fall frost
October 1
spring planting
Direct sow
Apr 21
Projected first harvest
Jun 20
fall planting
Direct sow
Aug 6
Projected first harvest
Oct 5
spring planting
fall planting
Most radishes mature in about 24 to 60 days depending on the variety. Full zone 5 guide (both 5a and 5b) →
Radishes planting calendar for New Hampshire, Zone 5b
Average last spring frost
April 30
Average first fall frost
October 5
spring planting
Direct sow
Apr 16
Projected first harvest
Jun 15
fall planting
Direct sow
Aug 10
Projected first harvest
Oct 9
spring planting
fall planting
Most radishes mature in about 24 to 60 days depending on the variety. Full zone 5 guide (both 5a and 5b) →
Radishes planting calendar for New Hampshire, Zone 6a
Average last spring frost
April 25
Average first fall frost
October 10
spring planting
Direct sow
Apr 11
Projected first harvest
Jun 10
fall planting
Direct sow
Aug 15
Projected first harvest
Oct 14
spring planting
fall planting
Most radishes mature in about 24 to 60 days depending on the variety. Full zone 6 guide (both 6a and 6b) →
Radishes planting calendar for New Hampshire, Zone 6b
Average last spring frost
April 20
Average first fall frost
October 15
spring planting
Direct sow
Apr 6
Projected first harvest
Jun 5
fall planting
Direct sow
Aug 20
Projected first harvest
Oct 19
spring planting
fall planting
Most radishes mature in about 24 to 60 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
6 varieties of radishes in the HomeSown library. Tap any for its full grow guide.
Common problems with radishes
What to watch for, with identification and treatment for each
🌱 Grow radishes with a calendar built for your exact yard
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