When to plant leeks in New Hampshire

Leeks
Plant out in Manchester
Apr 16–Apr 30

Across New Hampshire the window opens between April 15 and April 30. Find your city below; the dates follow each town's own average last frost.

Start indoors, Manchester
Feb 5–Feb 19
Plant out, Manchester
Apr 16–Apr 30
Last frost, Manchester
Apr 30

Start seeds indoors 10–12 weeks before the last frost; plant out up to 2 weeks before the last frost. Plant leeks deep in a trench and fill it in as they grow to get long white stems.

Leeks planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
ManchesterApr 16–Apr 30
NashuaApr 15–Apr 29
ConcordApr 24–May 8
DoverApr 19–May 3
RochesterApr 16–Apr 30
KeeneApr 30–May 14
PortsmouthApr 20–May 4
DerryApr 16–Apr 30

Questions

When should I plant leeks in New Hampshire?

In Manchester, plant out from April 16 to April 30. Across New Hampshire the window opens between April 15 and April 30, depending on the local last frost.

How is this date worked out?

Start seeds indoors 10–12 weeks before the last frost; plant out up to 2 weeks before the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for New Hampshire

Leeks in other states

Frost dates for every city in New Hampshire