FrostCal

When to Plant Cosmos: Planting Dates by State

The right time to plant cosmos depends on your local frost dates. Easy from direct seed 1-3 weeks after last frost; can also start indoors 3-4 weeks early.

Days to maturity 60–90 days

Cosmos Planting Windows by State

StatePlanting window across the state
AlabamaTransplant outdoors Feb 28 (Mobile) to Apr 13 (Jacksonville)
AlaskaTransplant outdoors Apr 11 (Ketchikan) to Jun 18 (Kalifornsky)
ArizonaTransplant outdoors Jan 11 (Bullhead City) to Jun 11 (Flagstaff)
ArkansasTransplant outdoors Mar 20 (Texarkana) to Apr 19 (Centerton)
CaliforniaTransplant outdoors Jan 5 (San Mateo) to Jun 3 (Big Bear City)
ColoradoTransplant outdoors Apr 21 (Grand Junction) to Jun 28 (Edwards)
ConnecticutTransplant outdoors Apr 12 (Bridgeport) to May 15 (Torrington)
DelawareTransplant outdoors Apr 6 (Claymont) to Apr 26 (Hockessin)
District of ColumbiaTransplant outdoors Mar 31 (Washington) to Apr 16 (Chevy Chase)
FloridaTransplant outdoors Jan 22 (Sarasota) to Mar 28 (Crestview)
GeorgiaTransplant outdoors Feb 9 (St. Marys) to Apr 18 (Cartersville)
IdahoTransplant outdoors Apr 13 (Lewiston) to May 24 (Eagle)
IllinoisTransplant outdoors Apr 8 (Granite City) to May 8 (Roscoe)
IndianaTransplant outdoors Apr 5 (Evansville) to May 9 (Auburn)
IowaTransplant outdoors Apr 17 (Keokuk) to May 10 (Grinnell)
KansasTransplant outdoors Apr 11 (Kansas City) to May 5 (Garden City)
KentuckyTransplant outdoors Apr 7 (Louisville) to May 8 (Shelbyville)
LouisianaTransplant outdoors Jan 31 (Metairie) to Mar 24 (Minden)
MaineTransplant outdoors May 2 (Lewiston) to May 23 (Sanford)
MarylandTransplant outdoors Mar 29 (California) to May 1 (Westminster)
MassachusettsTransplant outdoors Apr 11 (Boston) to May 17 (North Adams)
MichiganTransplant outdoors Apr 26 (Port Huron) to May 26 (Cadillac)
MinnesotaTransplant outdoors Apr 28 (Winona) to Jun 12 (Hibbing)
MississippiTransplant outdoors Feb 19 (Biloxi) to Apr 10 (Oxford)
MissouriTransplant outdoors Apr 2 (Sikeston) to Apr 28 (Kirksville)
MontanaTransplant outdoors May 12 (Laurel) to Jun 20 (Butte)
NebraskaTransplant outdoors Apr 22 (Elkhorn) to May 18 (Alliance)
NevadaTransplant outdoors Jan 27 (Henderson) to Jun 13 (Spring Creek)
New HampshireTransplant outdoors Apr 28 (Salem) to May 21 (Berlin)
New JerseyTransplant outdoors Apr 2 (Atlantic City) to May 7 (Manville)
New MexicoTransplant outdoors Mar 7 (Chaparral) to May 31 (Las Vegas)
New YorkTransplant outdoors Apr 2 (Elmhurst) to May 24 (Corning)
North CarolinaTransplant outdoors Mar 25 (Morehead City) to May 9 (Boone)
North DakotaTransplant outdoors May 11 (Wahpeton) to May 28 (Beulah)
OhioTransplant outdoors Apr 15 (Cleveland) to May 15 (Girard)
OklahomaTransplant outdoors Mar 22 (Ardmore) to Apr 25 (Guymon)
OregonTransplant outdoors Feb 18 (Beaverton) to Jun 16 (Altamont)
PennsylvaniaTransplant outdoors Apr 6 (Philadelphia) to May 22 (Hermitage)
Rhode IslandTransplant outdoors Apr 14 (Newport) to May 8 (Narragansett)
South CarolinaTransplant outdoors Feb 11 (Charleston) to Apr 27 (Gaffney)
South DakotaTransplant outdoors May 3 (Tea) to May 19 (Ellsworth Air Force Base)
TennesseeTransplant outdoors Mar 23 (New South Memphis) to Apr 28 (Bristol)
TexasTransplant outdoors Jan 15 (Edinburg) to Apr 28 (Dumas)
UtahTransplant outdoors Mar 21 (Saint George) to Jun 11 (Heber City)
VermontTransplant outdoors May 6 (Burlington) to May 27 (Morristown)
VirginiaTransplant outdoors Mar 23 (Newport News) to May 3 (Radford)
WashingtonTransplant outdoors Mar 8 (Port Townsend) to Jun 6 (Cheney)
West VirginiaTransplant outdoors Apr 19 (Huntington) to May 13 (Beckley)
WisconsinTransplant outdoors Apr 26 (Kenosha) to May 18 (Merrill)
WyomingTransplant outdoors May 11 (Worland) to Jun 19 (Evanston)

Pick a state for city-by-city dates. For the most precise dates, look up your ZIP code.

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