FrostCal

When to Plant Radishes in Delaware

In a typical Delaware location, sow outdoors Mar 3 – Mar 17. Across the state, the outdoor planting window starts as early as Feb 23 in Claymont and as late as Mar 15 in Hockessin. For a fall crop, plant around Sep 21 – Oct 5.

Method Direct sow
Days to maturity 22–30 days

Very fast and cold-hardy; direct sow 3-5 weeks before last frost, as soon as soil can be worked.

Radishes Planting Dates by City

CityDirect sowFall planting
WilmingtonMar 3 – Mar 17Sep 23 – Oct 7
DoverFeb 28 – Mar 14Sep 23 – Oct 7
NewarkMar 3 – Mar 17Sep 21 – Oct 5
MiddletownMar 3 – Mar 17Sep 21 – Oct 5
BearMar 3 – Mar 17Sep 20 – Oct 4
BrooksideMar 3 – Mar 17Sep 21 – Oct 5
GlasgowMar 3 – Mar 17Sep 21 – Oct 5
HockessinMar 15 – Mar 29Sep 14 – Sep 28
SmyrnaFeb 28 – Mar 14Sep 23 – Oct 7
Pike Creek ValleyMar 3 – Mar 17Sep 21 – Oct 5
MilfordMar 7 – Mar 21Sep 18 – Oct 2
ClaymontFeb 23 – Mar 9Oct 5 – Oct 19
North StarMar 3 – Mar 17Sep 21 – Oct 5
Pike CreekMar 3 – Mar 17Sep 21 – Oct 5
Wilmington ManorMar 3 – Mar 17Sep 20 – Oct 4
SeafordMar 7 – Mar 21Sep 18 – Oct 2
GeorgetownFeb 28 – Mar 14Sep 25 – Oct 9
ElsmereMar 3 – Mar 17Sep 23 – Oct 7
EdgemoorMar 3 – Mar 17Sep 23 – Oct 7
New CastleMar 3 – Mar 17Sep 20 – Oct 4

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 radishes in Delaware?

In a typical Delaware location, sow outdoors Mar 3 – Mar 17. Across the state, the outdoor planting window starts as early as Feb 23 in Claymont and as late as Mar 15 in Hockessin. For a fall crop, plant around Sep 21 – Oct 5.

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 radishes take to grow?

Radishes typically take 22–30 days from planting to harvest. Very fast and cold-hardy; direct sow 3-5 weeks before last frost, as soon as soil can be worked.

Other Crops in Delaware

When to plant radishes in other states

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