When to plant cucumbers in New Hampshire

Cucumbers
Plant out in Manchester
May 14–May 21

Across New Hampshire the window opens between May 13 and May 28. Find your city below; the dates follow each town's own average last frost.

Start indoors, Manchester
Apr 2–Apr 9
Plant out, Manchester
May 14–May 21
Sow outdoors, Manchester
May 7–May 21
Last sowing for a harvest
Jul 19
Last frost, Manchester
Apr 30

Start seeds indoors 3–4 weeks before the last frost; plant out 2–3 weeks after the last frost; sow outdoors 1–3 weeks after the last frost. Cucumbers rot in cold soil. Sow when the soil is at least 65°F.

Cucumbers planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
ManchesterMay 14–May 21
NashuaMay 13–May 20
ConcordMay 22–May 29
DoverMay 17–May 24
RochesterMay 14–May 21
KeeneMay 28–Jun 4
PortsmouthMay 18–May 25
DerryMay 14–May 21

Questions

When should I plant cucumbers in New Hampshire?

In Manchester, plant out from May 14 to May 21. Across New Hampshire the window opens between May 13 and May 28, depending on the local last frost.

How is this date worked out?

Start seeds indoors 3–4 weeks before the last frost; plant out 2–3 weeks after the last frost; sow outdoors 1–3 weeks after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for New Hampshire

Cucumbers in other states

Frost dates for every city in New Hampshire