FrostCal

When to Plant Sweet Potatoes in Delaware

In a typical Delaware location, plant outdoors Apr 21 – May 5. Across the state, the outdoor planting window starts as early as Apr 13 in Claymont and as late as May 3 in Hockessin.

Method Plant out (slips, crowns, or tubers)
Days to maturity 90–120 days

Set out slips 2-4 weeks after last frost once soil is thoroughly warm (65F+); very frost/cold sensitive.

Sweet Potatoes Planting Dates by City

CityPlant outdoors
WilmingtonApr 21 – May 5
DoverApr 18 – May 2
NewarkApr 21 – May 5
MiddletownApr 21 – May 5
BearApr 21 – May 5
BrooksideApr 21 – May 5
GlasgowApr 21 – May 5
HockessinMay 3 – May 17
SmyrnaApr 18 – May 2
Pike Creek ValleyApr 21 – May 5
MilfordApr 25 – May 9
ClaymontApr 13 – Apr 27
North StarApr 21 – May 5
Pike CreekApr 21 – May 5
Wilmington ManorApr 21 – May 5
SeafordApr 25 – May 9
GeorgetownApr 18 – May 2
ElsmereApr 21 – May 5
EdgemoorApr 21 – May 5
New CastleApr 21 – May 5

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 sweet potatoes in Delaware?

In a typical Delaware location, plant outdoors Apr 21 – May 5. Across the state, the outdoor planting window starts as early as Apr 13 in Claymont and as late as May 3 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 sweet potatoes take to grow?

Sweet Potatoes typically take 90–120 days from planting to harvest. Set out slips 2-4 weeks after last frost once soil is thoroughly warm (65F+); very frost/cold sensitive.

Other Crops in Delaware

When to plant sweet potatoes in other states

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