Seed Starting and Planting Date Calculator for Ashburn, VA

Here are seed-starting dates for your first spring planting. These dates are based on historical frost dates, as reported by your nearest government weather stations.

Historical data is useful way to get a sense of "typical" frost dates to give you a general sense of timing. However, it is not a replacement for good judgement. Obviously, you need to be aware of your weather this coming season. Other factors that can also influence your planting dates include soil temperature, altitude and slope of land, nearby waters, and day length. Also, keep records of your garden's conditions each year to plan more accurately.

On chart below, please note:

  • Seeds for plants with a long growing season should be started indoors during the periods shown below.
  • Seeds for plants sown in the ground should be planted during the periods shown.
  • When no dates appear in the chart, that starting method is not recommended for the particular vegetable.


50% probability of frost free after April 23 (at WASHINGTON DULLES INTL, VA climate station).

CropStart Seeds IndoorsMoon-favorable DatesSet Out Plants/
Start Seeds Outdoors
Moon-favorable Dates
BeansApr 30-May 21May 15-21
BeetsApr 9-30Apr 9-14, Apr 30
BroccoliMar 12-26Mar 17-26Apr 2-23Apr 15-23
Brussels sproutsMar 12-26Mar 17-26Mar 26-Apr 16Mar 26-31, Apr 15-16
CabbageFeb 25-Mar 12Feb 25-Mar 1Mar 26-Apr 9Mar 26-31
CarrotsMar 19-Apr 2Apr 1- 2
CauliflowerMar 12-26Mar 17-26Mar 26-Apr 9Mar 26-31
CeleryFeb 11-25Feb 15-25Apr 30-May 14
CollardsMar 12-26Mar 17-26Mar 26-Apr 16Mar 26-31, Apr 15-16
CornApr 23-May 7Apr 23-29
CucumbersMar 26-Apr 2Mar 26-31May 7-28May 15-28
EggplantFeb 11-25Feb 15-25May 7-28May 15-28
KaleMar 12-26Mar 17-26Mar 26-Apr 16Mar 26-31, Apr 15-16
KohlrabiMar 26-Apr 16Mar 26-31, Apr 15-16
LeeksFeb 11-25Feb 15-25Mar 26-Apr 16Mar 26-31, Apr 15-16
LettuceMar 12-26Mar 17-26Apr 9-May 7Apr 15-29
MelonsMar 26-Apr 2Mar 26-31May 7-28May 15-28
OkraMay 7-21May 15-21
Onion setsMar 26-Apr 16Apr 1-14
ParsnipsApr 2-23Apr 2-14
PeasMar 12-Apr 2Mar 17-31
PeppersFeb 11-25Feb 15-25May 7-28May 15-28
Potato tubersApr 16-May 7Apr 30-May 7
PumpkinsMar 26-Apr 9Mar 26-31May 7-28May 15-28
RadishesFeb 25-Mar 19Mar 2-16
SpinachMar 12-Apr 2Mar 17-31
SquashMar 26-Apr 9Mar 26-31May 7-28May 15-28
Sweet PotatoesMar 26-Apr 2Apr 1- 2May 7-28May 7-14
Swiss ChardMar 12-26Mar 17-26Apr 2- 9
TomatoesFeb 25-Mar 12Feb 25-Mar 1Apr 30-May 21May 15-21
TurnipsMar 26-Apr 16Apr 1-14
WatermelonMar 26-Apr 2Mar 26-31May 7-28May 15-28