FrostCal

When to Plant Radishes in New Hampshire

In a typical New Hampshire location, sow outdoors Mar 29 – Apr 12. Across the state, the outdoor planting window starts as early as Mar 17 in Salem and as late as Apr 9 in Berlin. For a fall crop, plant around Aug 28 – Sep 11.

Method Direct sow
Days to maturity 22–30 days

Very fast and cold-hardy; direct sow 3-5 weeks before last frost, as soon as soil can be worked.

Radishes Planting Dates by City

CityDirect sowFall planting
ManchesterMar 26 – Apr 9Aug 30 – Sep 13
NashuaMar 26 – Apr 9Aug 31 – Sep 14
ConcordApr 3 – Apr 17Aug 22 – Sep 5
East ConcordApr 3 – Apr 17Aug 22 – Sep 5
Derry VillageMar 26 – Apr 9Aug 30 – Sep 13
DoverMar 29 – Apr 12Aug 29 – Sep 12
RochesterMar 26 – Apr 9Aug 28 – Sep 11
SalemMar 17 – Mar 31Sep 9 – Sep 23
MerrimackMar 26 – Apr 9Aug 31 – Sep 14
KeeneApr 9 – Apr 23Aug 20 – Sep 3
DerryMar 26 – Apr 9Aug 30 – Sep 13
PortsmouthMar 30 – Apr 13Aug 27 – Sep 10
BedfordMar 17 – Mar 31Sep 7 – Sep 21
LaconiaMar 26 – Apr 9Sep 6 – Sep 20
LebanonApr 4 – Apr 18Aug 25 – Sep 8
WindhamMar 29 – Apr 12Aug 27 – Sep 10
ClaremontApr 9 – Apr 23Aug 20 – Sep 3
PelhamMar 29 – Apr 12Aug 27 – Sep 10
SomersworthMar 26 – Apr 9Aug 28 – Sep 11
LondonderryMar 17 – Mar 31Sep 7 – Sep 21
DurhamApr 3 – Apr 17Aug 23 – Sep 6
HamptonMar 30 – Apr 13Aug 27 – Sep 10
BerlinApr 9 – Apr 23Aug 19 – Sep 2
ExeterMar 30 – Apr 13Aug 27 – Sep 10

Showing the 24 most populous of 24 New Hampshire cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all New Hampshire cities.

Frequently Asked Questions

When should I plant radishes in New Hampshire?

In a typical New Hampshire location, sow outdoors Mar 29 – Apr 12. Across the state, the outdoor planting window starts as early as Mar 17 in Salem and as late as Apr 9 in Berlin. For a fall crop, plant around Aug 28 – Sep 11.

When is the last frost in New Hampshire?

The average last spring frost in New Hampshire ranges from April 21 in Salem to May 14 in Berlin, based on NOAA 1991–2020 climate normals.

How long do radishes take to grow?

Radishes typically take 22–30 days from planting to harvest. Very fast and cold-hardy; direct sow 3-5 weeks before last frost, as soon as soil can be worked.

Other Crops in New Hampshire

When to plant radishes in other states

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