When to plant Kale in New Hampshire

In spring, from Apr 1 – 20 in Dover to Apr 10 – May 1 in Lebanon.

In fall, from June 15 – July 15 in Claremont to July 15 – Aug 15 in Laconia.

USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.

Kale planting dates by place in New Hampshire
PlaceSpringFall
ClaremontApr 10 – May 1June 15 – July 15
ConcordApr 10 – May 1June 15 – July 15
DoverApr 1 – 20July 1 – Aug 1
KeeneApr 10 – May 1June 15 – July 15
LaconiaApr 1 – 20July 15 – Aug 15
LebanonApr 10 – May 1July 1 – Aug 1
ManchesterApr 1 – 20July 1 – Aug 1
NashuaApr 1 – 20July 1 – Aug 1
PortsmouthApr 1 – 20July 1 – Aug 1
RochesterApr 1 – 20July 1 – Aug 1
SomersworthApr 1 – 20July 1 – Aug 1

Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for kale.