When to plant zucchini in New Hampshire

Sow outdoors in Manchester

May 7–May 21

Across New Hampshire the window opens between May 6 and May 21. Find your city below; the dates follow each town's own average last frost.

Sow outdoors 1–3 weeks after the last frost. Two plants are plenty for most families. Pick fruit at 6–8 inches.

Zucchini planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost

JanFebMarAprMayJunJulAugSepOctNovDec

ManchesterMay 7–May 21

NashuaMay 6–May 20

ConcordMay 15–May 29

DoverMay 10–May 24

RochesterMay 7–May 21

KeeneMay 21–Jun 4

PortsmouthMay 11–May 25

DerryMay 7–May 21

When should I plant zucchini in New Hampshire?

In Manchester, sow outdoors from May 7 to May 21. Across New Hampshire the window opens between May 6 and May 21, depending on the local last frost.

How is this date worked out?

Sow outdoors 1–3 weeks after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.