When to plant Onion sets in California

In spring, from Jan 1 – 15 in Agoura Hills to May 10 – June 10 in Truckee.

In fall, from Oct 1 – Dec 1 in Adelanto to Nov 1 – Dec 31 in Yucca Valley.

USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.

Onion sets planting dates by place in California
PlaceSpringFall
AdelantoFeb 1 – Mar 20Oct 1 – Dec 1Now
Agoura HillsJan 1 – 15Nov 1 – Dec 31Soon
Alameda—Nov 1 – Dec 31Soon
Albany—Nov 1 – Dec 31Soon
Alhambra—Nov 1 – Dec 31Soon
Aliso Viejo—Nov 1 – Dec 31Soon
American CanyonJan 1 – Mar 1Nov 1 – Dec 31Soon
Anaheim—Nov 1 – Dec 31Soon
AndersonJan 1 – Mar 1Nov 1 – Dec 31Soon
Antioch—Nov 1 – Dec 31Soon
Apple ValleyFeb 1 – Mar 20Oct 1 – Dec 1Now
Arcadia—Nov 1 – Dec 31Soon
ArcataJan 1 – 15Nov 1 – Dec 31Soon
Arroyo GrandeJan 1 – 15Nov 1 – Dec 31Soon
Artesia—Nov 1 – Dec 31Soon
ArvinJan 1 – 15Nov 1 – Dec 31Soon
AtascaderoJan 15 – Mar 10Oct 1 – Dec 1Now
AtwaterJan 1 – Mar 1Nov 1 – Dec 31Soon
AuburnJan 1 – Mar 1Nov 1 – Dec 31Soon
AvenalJan 1 – 15Nov 1 – Dec 31Soon
Azusa—Nov 1 – Dec 31Soon
BakersfieldJan 1 – 15Nov 1 – Dec 31Soon
Baldwin Park—Nov 1 – Dec 31Soon
BanningJan 1 – 15Nov 1 – Dec 31Soon
BarstowJan 1 – 15Nov 1 – Dec 31Soon
BeaumontJan 1 – 15Nov 1 – Dec 31Soon
Bell——
Bell Gardens——
Bellflower——
BelmontJan 1 – 15Nov 1 – Dec 31Soon
BeniciaJan 1 – 15Nov 1 – Dec 31Soon
Berkeley—Nov 1 – Dec 31Soon
Beverly Hills——
BlytheJan 1 – 15Nov 1 – Dec 31Soon
BrawleyJan 1 – 15Nov 1 – Dec 31Soon
Brea—Nov 1 – Dec 31Soon
Brentwood—Nov 1 – Dec 31Soon
Buena Park——
Burbank—Nov 1 – Dec 31Soon
Burlingame—Nov 1 – Dec 31Soon
CalabasasJan 1 – 15Nov 1 – Dec 31Soon
Calexico—Nov 1 – Dec 31Soon
California CityJan 15 – Mar 10Nov 1 – Dec 31Soon
CalimesaJan 1 – 15Nov 1 – Dec 31Soon
Camarillo—Nov 1 – Dec 31Soon
CampbellJan 1 – 15Nov 1 – Dec 31Soon
Canyon LakeJan 1 – 15Nov 1 – Dec 31Soon
CarlsbadJan 1 – 15Nov 1 – Dec 31Soon
Carpinteria——
Carson——
Cathedral City——
CeresJan 1 – 15Nov 1 – Dec 31Soon
Cerritos—Nov 1 – Dec 31Soon
ChicoJan 1 – Mar 1Nov 1 – Dec 31Soon
ChinoJan 1 – 15Nov 1 – Dec 31Soon
Chino HillsJan 1 – 15Nov 1 – Dec 31Soon
ChowchillaJan 1 – 15Nov 1 – Dec 31Soon
Chula Vista—Nov 1 – Dec 31Soon
Citrus Heights—Nov 1 – Dec 31Soon
Claremont—Nov 1 – Dec 31Soon
ClaytonJan 15 – Mar 10Nov 1 – Dec 31Soon
ClearlakeMar 1 – Apr 1Oct 1 – Dec 1Now
Clovis—Nov 1 – Dec 31Soon
Coachella—Nov 1 – Dec 31Soon
CoalingaJan 1 – 15Nov 1 – Dec 31Soon
Colton—Nov 1 – Dec 31Soon
Commerce——
Compton——
Concord—Nov 1 – Dec 31Soon
CorcoranJan 1 – 15Nov 1 – Dec 31Soon
CoronaJan 1 – 15Nov 1 – Dec 31Soon
Coronado——
Corte MaderaJan 1 – 15Nov 1 – Dec 31Soon
Costa Mesa——
Covina—Nov 1 – Dec 31Soon
Cudahy——
Culver City——
Cupertino—Nov 1 – Dec 31Soon
Cypress——
Daly City—Nov 1 – Dec 31Soon
Dana Point—Nov 1 – Dec 31Soon
DanvilleJan 15 – Mar 10Nov 1 – Dec 31Soon
DavisJan 1 – 15Nov 1 – Dec 31Soon
DelanoJan 1 – 15Nov 1 – Dec 31Soon
Desert Hot SpringsJan 1 – Mar 1Nov 1 – Dec 31Soon
Diamond Bar—Nov 1 – Dec 31Soon
DinubaJan 1 – 15Nov 1 – Dec 31Soon
DixonJan 1 – 15Nov 1 – Dec 31Soon
Downey——
DuarteMar 10 – Apr 10Oct 1 – Dec 1Now
DublinJan 1 – 15Nov 1 – Dec 31Soon
East Palo AltoJan 1 – 15Nov 1 – Dec 31Soon
EastvaleJan 1 – 15Nov 1 – Dec 31Soon
El Cajon—Nov 1 – Dec 31Soon
El Centro—Nov 1 – Dec 31Soon
El Cerrito—Nov 1 – Dec 31Soon
El Monte—Nov 1 – Dec 31Soon
El Paso de Robles (Paso Robles)Jan 15 – Mar 10Oct 1 – Dec 1Now
El Segundo——
Elk GroveJan 1 – 15Nov 1 – Dec 31Soon
Emeryville—Nov 1 – Dec 31Soon
Encinitas—Nov 1 – Dec 31Soon
Escondido—Nov 1 – Dec 31Soon
EurekaJan 1 – 15Nov 1 – Dec 31Soon
ExeterJan 1 – 15Nov 1 – Dec 31Soon
FairfieldJan 1 – 15Nov 1 – Dec 31Soon
FarmersvilleJan 1 – 15Nov 1 – Dec 31Soon
Fillmore—Nov 1 – Dec 31Soon
Folsom—Nov 1 – Dec 31Soon
Fontana—Nov 1 – Dec 31Soon
FortunaJan 1 – 15Nov 1 – Dec 31Soon
Foster CityJan 1 – 15Nov 1 – Dec 31Soon
Fountain Valley——
Fremont—Nov 1 – Dec 31Soon
Fresno—Nov 1 – Dec 31Soon
Fullerton——
GaltJan 1 – 15Nov 1 – Dec 31Soon
Garden Grove——
Gardena——
GilroyJan 1 – Mar 1Nov 1 – Dec 31Soon
Glendale—Nov 1 – Dec 31Soon
Glendora—Nov 1 – Dec 31Soon
Goleta—Nov 1 – Dec 31Soon
Grand Terrace—Nov 1 – Dec 31Soon
Grass ValleyMar 1 – Apr 1Oct 1 – Dec 1Now
GreenfieldJan 1 – 15Nov 1 – Dec 31Soon
Grover BeachJan 1 – 15Nov 1 – Dec 31Soon
Half Moon BayJan 1 – 15Nov 1 – Dec 31Soon
HanfordJan 1 – 15Nov 1 – Dec 31Soon
Hawaiian Gardens——
Hawthorne——
Hayward—Nov 1 – Dec 31Soon
HealdsburgJan 1 – 15Nov 1 – Dec 31Soon
HemetJan 1 – 15Nov 1 – Dec 31Soon
HerculesJan 1 – 15Nov 1 – Dec 31Soon
Hermosa Beach——
HesperiaJan 1 – Mar 1Nov 1 – Dec 31Soon
HighlandJan 1 – 15Nov 1 – Dec 31Soon
Hillsborough—Nov 1 – Dec 31Soon
HollisterJan 1 – 15Nov 1 – Dec 31Soon
Huntington Beach——
Huntington Park——
Imperial—Nov 1 – Dec 31Soon
Imperial Beach—Nov 1 – Dec 31Soon
Indio—Nov 1 – Dec 31Soon
Inglewood——
Irvine—Nov 1 – Dec 31Soon
Jurupa Valley—Nov 1 – Dec 31Soon
KermanJan 1 – 15Nov 1 – Dec 31Soon
King CityJan 1 – 15Nov 1 – Dec 31Soon
KingsburgJan 1 – 15Nov 1 – Dec 31Soon
La Cañada Flintridge——
La Habra—Nov 1 – Dec 31Soon
La Mesa—Nov 1 – Dec 31Soon
La Mirada—Nov 1 – Dec 31Soon
La Palma——
La Puente—Nov 1 – Dec 31Soon
La Quinta—Nov 1 – Dec 31Soon
La Verne—Nov 1 – Dec 31Soon
Lafayette—Nov 1 – Dec 31Soon
Laguna Beach—Nov 1 – Dec 31Soon
Laguna Hills—Nov 1 – Dec 31Soon
Laguna Niguel—Nov 1 – Dec 31Soon
Laguna Woods—Nov 1 – Dec 31Soon
Lake ElsinoreJan 1 – 15Nov 1 – Dec 31Soon
Lake Forest—Nov 1 – Dec 31Soon
Lakewood——
LancasterFeb 15 – Mar 20Not listed
LarkspurJan 1 – 15Nov 1 – Dec 31Soon
LathropJan 1 – 15Nov 1 – Dec 31Soon
Lawndale——
Lemon Grove—Nov 1 – Dec 31Soon
LemooreJan 1 – Mar 1Nov 1 – Dec 31Soon
LincolnJan 1 – Mar 1Nov 1 – Dec 31Soon
LindsayJan 1 – 15Nov 1 – Dec 31Soon
LivermoreJan 1 – 15Nov 1 – Dec 31Soon
Livingston—Nov 1 – Dec 31Soon
LodiJan 1 – 15Nov 1 – Dec 31Soon
Loma LindaJan 1 – 15Nov 1 – Dec 31Soon
Lomita——
LompocJan 1 – 15Nov 1 – Dec 31Soon
Long Beach——
Los Alamitos——
Los Altos—Nov 1 – Dec 31Soon
Los Angeles——
Los BanosJan 1 – 15Nov 1 – Dec 31Soon
Los GatosJan 1 – 15Nov 1 – Dec 31Soon
Lynwood——
MaderaJan 1 – 15Nov 1 – Dec 31Soon
Malibu——
Manhattan Beach——
MantecaJan 1 – 15Nov 1 – Dec 31Soon
MarinaJan 1 – 15Nov 1 – Dec 31Soon
MartinezJan 1 – Mar 1Nov 1 – Dec 31Soon
MarysvilleJan 1 – 15Nov 1 – Dec 31Soon
Maywood——
McFarlandJan 1 – 15Nov 1 – Dec 31Soon
MendotaJan 1 – 15Nov 1 – Dec 31Soon
MenifeeJan 1 – 15Nov 1 – Dec 31Soon
Menlo ParkJan 1 – 15Nov 1 – Dec 31Soon
MercedJan 1 – Mar 1Nov 1 – Dec 31Soon
Mill ValleyJan 1 – 15Nov 1 – Dec 31Soon
Millbrae—Nov 1 – Dec 31Soon
Milpitas—Nov 1 – Dec 31Soon
Mission Viejo—Nov 1 – Dec 31Soon
ModestoJan 1 – 15Nov 1 – Dec 31Soon
MonroviaMar 10 – Apr 10Oct 1 – Dec 1Now
Montclair—Nov 1 – Dec 31Soon
Montebello—Nov 1 – Dec 31Soon
Monterey—Nov 1 – Dec 31Soon
Monterey Park—Nov 1 – Dec 31Soon
Moorpark—Nov 1 – Dec 31Soon
Moraga—Nov 1 – Dec 31Soon
Moreno ValleyJan 1 – 15Nov 1 – Dec 31Soon
Morgan HillJan 1 – Mar 1Nov 1 – Dec 31Soon
Morro BayJan 1 – 15—
Mountain View—Nov 1 – Dec 31Soon
MurrietaJan 1 – 15—
NapaJan 1 – 15Nov 1 – Dec 31Soon
National City——
Newark—Nov 1 – Dec 31Soon
NewmanJan 1 – Mar 1Nov 1 – Dec 31Soon
Newport Beach——
NorcoJan 1 – 15Nov 1 – Dec 31Soon
Norwalk—Nov 1 – Dec 31Soon
Novato—Nov 1 – Dec 31Soon
OakdaleJan 1 – 15Nov 1 – Dec 31Soon
Oakland—Nov 1 – Dec 31Soon
Oakley—Nov 1 – Dec 31Soon
OceansideJan 1 – 15Nov 1 – Dec 31Soon
Ontario—Nov 1 – Dec 31Soon
Orange——
Orinda—Nov 1 – Dec 31Soon
OrovilleJan 1 – 15Nov 1 – Dec 31Soon
Oxnard—Nov 1 – Dec 31Soon
Pacific Grove—Nov 1 – Dec 31Soon
Pacifica——
Palm Desert—Nov 1 – Dec 31Soon
Palm Springs—Nov 1 – Dec 31Soon
PalmdaleJan 15 – Mar 10Nov 1 – Dec 31Soon
Palo AltoJan 1 – 15Nov 1 – Dec 31Soon
Palos Verdes Estates——
Paramount——
ParlierJan 1 – 15Nov 1 – Dec 31Soon
Pasadena——
PattersonJan 1 – 15Nov 1 – Dec 31Soon
PerrisJan 1 – 15Nov 1 – Dec 31Soon
PetalumaJan 1 – Mar 1Nov 1 – Dec 31Soon
Pico Rivera—Nov 1 – Dec 31Soon
Piedmont—Nov 1 – Dec 31Soon
Pinole—Nov 1 – Dec 31Soon
Pittsburg—Nov 1 – Dec 31Soon
Placentia—Nov 1 – Dec 31Soon
PlacervilleFeb 15 – Mar 20Nov 1 – Dec 31Soon
Pleasant Hill—Nov 1 – Dec 31Soon
PleasantonJan 1 – 15Nov 1 – Dec 31Soon
Pomona—Nov 1 – Dec 31Soon
Port Hueneme—Nov 1 – Dec 31Soon
PortervilleJan 1 – 15Nov 1 – Dec 31Soon
Poway—Nov 1 – Dec 31Soon
Rancho Cordova—Nov 1 – Dec 31Soon
Rancho Cucamonga—Nov 1 – Dec 31Soon
Rancho Mirage——
Rancho Palos Verdes——
Rancho Santa Margarita—Nov 1 – Dec 31Soon
Red BluffJan 1 – 15Nov 1 – Dec 31Soon
ReddingJan 1 – Mar 1Nov 1 – Dec 31Soon
RedlandsJan 1 – 15Nov 1 – Dec 31Soon
Redondo Beach——
Redwood CityJan 1 – 15Nov 1 – Dec 31Soon
ReedleyJan 1 – 15Nov 1 – Dec 31Soon
Rialto—Nov 1 – Dec 31Soon
Richmond—Nov 1 – Dec 31Soon
RidgecrestJan 15 – Mar 10Oct 1 – Dec 1Now
Rio Vista—Nov 1 – Dec 31Soon
RiponJan 1 – 15Nov 1 – Dec 31Soon
RiverbankJan 1 – 15Nov 1 – Dec 31Soon
Riverside—Nov 1 – Dec 31Soon
RocklinJan 1 – Mar 1Nov 1 – Dec 31Soon
Rohnert ParkJan 1 – Mar 1Nov 1 – Dec 31Soon
Rosemead—Nov 1 – Dec 31Soon
RosevilleJan 1 – 15Nov 1 – Dec 31Soon
Sacramento—Nov 1 – Dec 31Soon
SalinasJan 1 – 15Nov 1 – Dec 31Soon
San Anselmo—Nov 1 – Dec 31Soon
San BernardinoJan 1 – 15Nov 1 – Dec 31Soon
San Bruno——
San Buenaventura (Ventura)—Nov 1 – Dec 31Soon
San CarlosJan 1 – 15Nov 1 – Dec 31Soon
San Clemente—Nov 1 – Dec 31Soon
San Diego——
San Dimas—Nov 1 – Dec 31Soon
San Fernando—Nov 1 – Dec 31Soon
San Francisco—Nov 1 – Dec 31Soon
San Gabriel—Nov 1 – Dec 31Soon
San JacintoJan 1 – 15Nov 1 – Dec 31Soon
San Jose—Nov 1 – Dec 31Soon
San Juan Capistrano—Nov 1 – Dec 31Soon
San Leandro—Nov 1 – Dec 31Soon
San Luis ObispoJan 1 – 15Nov 1 – Dec 31Soon
San Marcos—Nov 1 – Dec 31Soon
San Marino——
San Mateo—Nov 1 – Dec 31Soon
San Pablo—Nov 1 – Dec 31Soon
San Rafael—Nov 1 – Dec 31Soon
San RamonJan 15 – Mar 10Nov 1 – Dec 31Soon
SangerJan 1 – 15Nov 1 – Dec 31Soon
Santa Ana——
Santa Barbara——
Santa Clara—Nov 1 – Dec 31Soon
Santa Clarita—Nov 1 – Dec 31Soon
Santa CruzJan 1 – 15Nov 1 – Dec 31Soon
Santa Fe Springs—Nov 1 – Dec 31Soon
Santa MariaJan 1 – 15Nov 1 – Dec 31Soon
Santa Monica——
Santa Paula—Nov 1 – Dec 31Soon
Santa RosaJan 1 – Mar 1Nov 1 – Dec 31Soon
Santee—Nov 1 – Dec 31Soon
SaratogaJan 1 – 15Nov 1 – Dec 31Soon
Scotts ValleyFeb 1 – Mar 20Oct 1 – Dec 1Now
Seal Beach——
Seaside—Nov 1 – Dec 31Soon
SelmaJan 1 – 15Nov 1 – Dec 31Soon
ShafterJan 1 – 15Nov 1 – Dec 31Soon
Shasta LakeJan 1 – 15Nov 1 – Dec 31Soon
Sierra MadreMar 10 – Apr 10Oct 1 – Dec 1Now
Signal Hill——
Simi ValleyJan 1 – 15Nov 1 – Dec 31Soon
Solana Beach—Nov 1 – Dec 31Soon
SoledadMar 10 – Apr 1Not listed
SonomaJan 1 – Mar 1Nov 1 – Dec 31Soon
South El Monte—Nov 1 – Dec 31Soon
South Gate——
South Lake TahoeMay 10 – June 10Spring-planted
South Pasadena——
South San Francisco—Nov 1 – Dec 31Soon
Stanton——
StocktonJan 1 – 15Nov 1 – Dec 31Soon
Suisun CityJan 1 – 15Nov 1 – Dec 31Soon
Sunnyvale—Nov 1 – Dec 31Soon
SusanvilleApr 20 – May 15Spring-planted
TehachapiMar 10 – Apr 10Not listed
TemeculaJan 1 – 15—
Temple City—Nov 1 – Dec 31Soon
Thousand Oaks—Nov 1 – Dec 31Soon
Torrance——
TracyJan 1 – Mar 1Nov 1 – Dec 31Soon
TruckeeMay 10 – June 10Spring-planted
TulareJan 1 – 15Nov 1 – Dec 31Soon
Turlock—Nov 1 – Dec 31Soon
Tustin—Nov 1 – Dec 31Soon
Twentynine PalmsJan 1 – 15Nov 1 – Dec 31Soon
UkiahFeb 1 – Mar 20Nov 1 – Dec 31Soon
Union City—Nov 1 – Dec 31Soon
Upland—Nov 1 – Dec 31Soon
VacavilleJan 1 – 15Nov 1 – Dec 31Soon
VallejoJan 1 – 15Nov 1 – Dec 31Soon
VictorvilleFeb 1 – Mar 20Oct 1 – Dec 1Now
VisaliaJan 1 – 15Nov 1 – Dec 31Soon
VistaJan 1 – 15—
Walnut—Nov 1 – Dec 31Soon
Walnut Creek—Nov 1 – Dec 31Soon
WascoJan 1 – 15Nov 1 – Dec 31Soon
WatsonvilleJan 1 – 15Nov 1 – Dec 31Soon
West Covina—Nov 1 – Dec 31Soon
West Hollywood——
West SacramentoJan 1 – 15Nov 1 – Dec 31Soon
Westminster——
Whittier—Nov 1 – Dec 31Soon
WildomarJan 1 – 15Nov 1 – Dec 31Soon
WindsorJan 1 – Mar 1Nov 1 – Dec 31Soon
WoodlandJan 1 – 15Nov 1 – Dec 31Soon
Yorba LindaJan 1 – 15Nov 1 – Dec 31Soon
Yuba CityJan 1 – 15Nov 1 – Dec 31Soon
YucaipaJan 1 – 15Nov 1 – Dec 31Soon
Yucca ValleyJan 15 – Mar 10Nov 1 – Dec 31Soon

Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for onion sets.