When to plant Broccoli and brussels sprouts in New Hampshire

In spring, from Apr 1 – May 1 in Dover to Apr 15 – June 1 in Lebanon.

For a fall crop, from June 1 – 30 in Claremont to July 1 – Aug 1 in Laconia.

USDA gives brussels sprouts the same planting dates as broccoli.

Dates are for setting out plants. USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.

Broccoli planting dates by place in New Hampshire
PlaceSpringFall
ClaremontApr 15 – June 1June 1 – 30
ConcordApr 15 – June 1June 1 – 30
DoverApr 1 – May 1June 15 – July 15
KeeneApr 15 – June 1June 1 – 30
LaconiaApr 1 – May 1July 1 – Aug 1
LebanonApr 15 – June 1June 15 – July 15
ManchesterApr 1 – May 1June 15 – July 15
NashuaApr 1 – May 1June 15 – July 15
PortsmouthApr 1 – May 1June 15 – July 15
RochesterApr 1 – May 1June 15 – July 15
SomersworthApr 1 – May 1June 15 – July 15

Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. The full USDA table for broccoli.

Updated