When to plant celery in Delaware

Plant out in Wilmington

Apr 14–Apr 21

Across Delaware the window opens between April 11 and April 14. Find your city below; the dates follow each town's own average last frost.

Start indoors, Wilmington: Jan 13–Jan 27
Plant out, Wilmington: Apr 14–Apr 21
Last frost, Wilmington: Apr 7

Start seeds indoors 10–12 weeks before the last frost; plant out 1–2 weeks after the last frost. Celery needs steady moisture all season.

Celery planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost

JanFebMarAprMayJunJulAugSepOctNovDec

WilmingtonApr 14–Apr 21

DoverApr 11–Apr 18

NewarkApr 14–Apr 21

MiddletownApr 14–Apr 21

BearApr 14–Apr 21

Questions

When should I plant celery in Delaware?

In Wilmington, plant out from April 14 to April 21. Across Delaware the window opens between April 11 and April 14, depending on the local last frost.

How is this date worked out?

Start seeds indoors 10–12 weeks before the last frost; plant out 1–2 weeks after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for Delaware

Celery in other states

Frost dates for every city in Delaware