FrostCal

When to Plant Broccoli in New Hampshire

In a typical New Hampshire location, start seeds indoors Mar 15 – Mar 29, then transplant outdoors Apr 12 – Apr 19. Across the state, the outdoor planting window starts as early as Mar 31 in Salem and as late as Apr 23 in Berlin. For a fall crop, plant around Aug 7 – Aug 14.

Method Start indoors, then transplant
Days to maturity 55–80 days

Start indoors 5-7 weeks before last frost; transplant out 2-3 weeks before last frost (hardens off to light frost).

Broccoli Planting Dates by City

CityStart indoorsTransplantFall planting
ManchesterMar 12 – Mar 26Apr 9 – Apr 16Aug 9 – Aug 16
NashuaMar 12 – Mar 26Apr 9 – Apr 16Aug 10 – Aug 17
ConcordMar 20 – Apr 3Apr 17 – Apr 24Aug 1 – Aug 8
East ConcordMar 20 – Apr 3Apr 17 – Apr 24Aug 1 – Aug 8
Derry VillageMar 12 – Mar 26Apr 9 – Apr 16Aug 9 – Aug 16
DoverMar 15 – Mar 29Apr 12 – Apr 19Aug 8 – Aug 15
RochesterMar 12 – Mar 26Apr 9 – Apr 16Aug 7 – Aug 14
SalemMar 3 – Mar 17Mar 31 – Apr 7Aug 19 – Aug 26
MerrimackMar 12 – Mar 26Apr 9 – Apr 16Aug 10 – Aug 17
KeeneMar 26 – Apr 9Apr 23 – Apr 30Jul 30 – Aug 6
DerryMar 12 – Mar 26Apr 9 – Apr 16Aug 9 – Aug 16
PortsmouthMar 16 – Mar 30Apr 13 – Apr 20Aug 6 – Aug 13
BedfordMar 3 – Mar 17Mar 31 – Apr 7Aug 17 – Aug 24
LaconiaMar 12 – Mar 26Apr 9 – Apr 16Aug 16 – Aug 23
LebanonMar 21 – Apr 4Apr 18 – Apr 25Aug 4 – Aug 11
WindhamMar 15 – Mar 29Apr 12 – Apr 19Aug 6 – Aug 13
ClaremontMar 26 – Apr 9Apr 23 – Apr 30Jul 30 – Aug 6
PelhamMar 15 – Mar 29Apr 12 – Apr 19Aug 6 – Aug 13
SomersworthMar 12 – Mar 26Apr 9 – Apr 16Aug 7 – Aug 14
LondonderryMar 3 – Mar 17Mar 31 – Apr 7Aug 17 – Aug 24
DurhamMar 20 – Apr 3Apr 17 – Apr 24Aug 2 – Aug 9
HamptonMar 16 – Mar 30Apr 13 – Apr 20Aug 6 – Aug 13
BerlinMar 26 – Apr 9Apr 23 – Apr 30Jul 29 – Aug 5
ExeterMar 16 – Mar 30Apr 13 – Apr 20Aug 6 – Aug 13

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 broccoli in New Hampshire?

In a typical New Hampshire location, start seeds indoors Mar 15 – Mar 29, then transplant outdoors Apr 12 – Apr 19. Across the state, the outdoor planting window starts as early as Mar 31 in Salem and as late as Apr 23 in Berlin. For a fall crop, plant around Aug 7 – Aug 14.

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 broccoli take to grow?

Broccoli typically take 55–80 days from planting to harvest. Start indoors 5-7 weeks before last frost; transplant out 2-3 weeks before last frost (hardens off to light frost).

Other Crops in New Hampshire

When to plant broccoli in other states

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