When to plant cucumbers in Delaware

Plant out in Wilmington

Apr 21–Apr 28

Across Delaware the window opens between April 18 and April 21. Find your city below; the dates follow each town's own average last frost.

Start indoors, Wilmington: Mar 10–Mar 17
Plant out, Wilmington: Apr 21–Apr 28
Sow outdoors, Wilmington: Apr 14–Apr 28
Last sowing for a harvest: Aug 12
Last frost, Wilmington: Apr 7

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

WilmingtonApr 21–Apr 28

DoverApr 18–Apr 25

NewarkApr 21–Apr 28

MiddletownApr 21–Apr 28

BearApr 21–Apr 28

Questions

When should I plant cucumbers in Delaware?

In Wilmington, plant out from April 21 to April 28. Across Delaware the window opens between April 18 and April 21, 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 Delaware

Cucumbers in other states

Frost dates for every city in Delaware