FrostCal

When to Plant Zucchini in Delaware

In a typical Delaware location, start seeds indoors Mar 17 – Mar 24, then sow outdoors Apr 14 – Apr 28, then transplant outdoors Apr 14 – Apr 21. Across the state, the outdoor planting window starts as early as Apr 6 in Claymont and as late as Apr 26 in Hockessin.

Method Direct sow
Days to maturity 45–55 days

Fast-growing squash; direct sow 1-3 weeks after last frost, or start indoors 2-3 weeks early for a head start.

Zucchini Planting Dates by City

CityStart indoorsDirect sowTransplant
WilmingtonMar 17 – Mar 24Apr 14 – Apr 28Apr 14 – Apr 21
DoverMar 14 – Mar 21Apr 11 – Apr 25Apr 11 – Apr 18
NewarkMar 17 – Mar 24Apr 14 – Apr 28Apr 14 – Apr 21
MiddletownMar 17 – Mar 24Apr 14 – Apr 28Apr 14 – Apr 21
BearMar 17 – Mar 24Apr 14 – Apr 28Apr 14 – Apr 21
BrooksideMar 17 – Mar 24Apr 14 – Apr 28Apr 14 – Apr 21
GlasgowMar 17 – Mar 24Apr 14 – Apr 28Apr 14 – Apr 21
HockessinMar 29 – Apr 5Apr 26 – May 10Apr 26 – May 3
SmyrnaMar 14 – Mar 21Apr 11 – Apr 25Apr 11 – Apr 18
Pike Creek ValleyMar 17 – Mar 24Apr 14 – Apr 28Apr 14 – Apr 21
MilfordMar 21 – Mar 28Apr 18 – May 2Apr 18 – Apr 25
ClaymontMar 9 – Mar 16Apr 6 – Apr 20Apr 6 – Apr 13
North StarMar 17 – Mar 24Apr 14 – Apr 28Apr 14 – Apr 21
Pike CreekMar 17 – Mar 24Apr 14 – Apr 28Apr 14 – Apr 21
Wilmington ManorMar 17 – Mar 24Apr 14 – Apr 28Apr 14 – Apr 21
SeafordMar 21 – Mar 28Apr 18 – May 2Apr 18 – Apr 25
GeorgetownMar 14 – Mar 21Apr 11 – Apr 25Apr 11 – Apr 18
ElsmereMar 17 – Mar 24Apr 14 – Apr 28Apr 14 – Apr 21
EdgemoorMar 17 – Mar 24Apr 14 – Apr 28Apr 14 – Apr 21
New CastleMar 17 – Mar 24Apr 14 – Apr 28Apr 14 – Apr 21

Showing the 20 most populous of 20 Delaware cities. Dates are estimates from each city's NOAA frost normals and university extension timing guidelines. See all Delaware cities.

Frequently Asked Questions

When should I plant zucchini in Delaware?

In a typical Delaware location, start seeds indoors Mar 17 – Mar 24, then sow outdoors Apr 14 – Apr 28, then transplant outdoors Apr 14 – Apr 21. Across the state, the outdoor planting window starts as early as Apr 6 in Claymont and as late as Apr 26 in Hockessin.

When is the last frost in Delaware?

The average last spring frost in Delaware ranges from March 30 in Claymont to April 19 in Hockessin, based on NOAA 1991–2020 climate normals.

How long do zucchini take to grow?

Zucchini typically take 45–55 days from planting to harvest. Fast-growing squash; direct sow 1-3 weeks after last frost, or start indoors 2-3 weeks early for a head start.

Other Crops in Delaware

When to plant zucchini in other states

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