When to plant collard greens in New Hampshire

Collard greens
Plant out in Manchester
Apr 2–Apr 16

Across New Hampshire the window opens between April 1 and April 16. Find your city below; the dates follow each town's own average last frost.

Plant out, Manchester
Apr 2–Apr 16
Fall planting, Manchester
Jul 19–Aug 2
Last frost, Manchester
Apr 30

Plant out 2–4 weeks before the last frost; sow again for fall 10–12 weeks before the first frost. Collards handle both heat and frost better than most greens.

Collard greens planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
ManchesterApr 2–Apr 16
NashuaApr 1–Apr 15
ConcordApr 10–Apr 24
DoverApr 5–Apr 19
RochesterApr 2–Apr 16
KeeneApr 16–Apr 30
PortsmouthApr 6–Apr 20
DerryApr 2–Apr 16

Questions

When should I plant collard greens in New Hampshire?

In Manchester, plant out from April 2 to April 16. Across New Hampshire the window opens between April 1 and April 16, depending on the local last frost.

How is this date worked out?

Plant out 2–4 weeks before the last frost; sow again for fall 10–12 weeks before the first frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for New Hampshire

Collard greens in other states

Frost dates for every city in New Hampshire