FrostCal

When to Plant Cauliflower in New Hampshire

In a typical New Hampshire location, start seeds indoors Mar 15 – Mar 29, then transplant outdoors Apr 19 – Apr 26. Across the state, the outdoor planting window starts as early as Apr 7 in Salem and as late as Apr 30 in Berlin. For a fall crop, plant around Jul 31 – Aug 7.

Method Start indoors, then transplant
Days to maturity 55–85 days

Fussier than broccoli about temperature swings; start indoors 5-7 weeks before last frost, transplant 1-2 weeks before last frost.

Cauliflower Planting Dates by City

CityStart indoorsTransplantFall planting
ManchesterMar 12 – Mar 26Apr 16 – Apr 23Aug 2 – Aug 9
NashuaMar 12 – Mar 26Apr 16 – Apr 23Aug 3 – Aug 10
ConcordMar 20 – Apr 3Apr 24 – May 1Jul 25 – Aug 1
East ConcordMar 20 – Apr 3Apr 24 – May 1Jul 25 – Aug 1
Derry VillageMar 12 – Mar 26Apr 16 – Apr 23Aug 2 – Aug 9
DoverMar 15 – Mar 29Apr 19 – Apr 26Aug 1 – Aug 8
RochesterMar 12 – Mar 26Apr 16 – Apr 23Jul 31 – Aug 7
SalemMar 3 – Mar 17Apr 7 – Apr 14Aug 12 – Aug 19
MerrimackMar 12 – Mar 26Apr 16 – Apr 23Aug 3 – Aug 10
KeeneMar 26 – Apr 9Apr 30 – May 7Jul 23 – Jul 30
DerryMar 12 – Mar 26Apr 16 – Apr 23Aug 2 – Aug 9
PortsmouthMar 16 – Mar 30Apr 20 – Apr 27Jul 30 – Aug 6
BedfordMar 3 – Mar 17Apr 7 – Apr 14Aug 10 – Aug 17
LaconiaMar 12 – Mar 26Apr 16 – Apr 23Aug 9 – Aug 16
LebanonMar 21 – Apr 4Apr 25 – May 2Jul 28 – Aug 4
WindhamMar 15 – Mar 29Apr 19 – Apr 26Jul 30 – Aug 6
ClaremontMar 26 – Apr 9Apr 30 – May 7Jul 23 – Jul 30
PelhamMar 15 – Mar 29Apr 19 – Apr 26Jul 30 – Aug 6
SomersworthMar 12 – Mar 26Apr 16 – Apr 23Jul 31 – Aug 7
LondonderryMar 3 – Mar 17Apr 7 – Apr 14Aug 10 – Aug 17
DurhamMar 20 – Apr 3Apr 24 – May 1Jul 26 – Aug 2
HamptonMar 16 – Mar 30Apr 20 – Apr 27Jul 30 – Aug 6
BerlinMar 26 – Apr 9Apr 30 – May 7Jul 22 – Jul 29
ExeterMar 16 – Mar 30Apr 20 – Apr 27Jul 30 – Aug 6

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 cauliflower in New Hampshire?

In a typical New Hampshire location, start seeds indoors Mar 15 – Mar 29, then transplant outdoors Apr 19 – Apr 26. Across the state, the outdoor planting window starts as early as Apr 7 in Salem and as late as Apr 30 in Berlin. For a fall crop, plant around Jul 31 – Aug 7.

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 cauliflower take to grow?

Cauliflower typically take 55–85 days from planting to harvest. Fussier than broccoli about temperature swings; start indoors 5-7 weeks before last frost, transplant 1-2 weeks before last frost.

Other Crops in New Hampshire

When to plant cauliflower in other states

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