When to plant onions in California

Plant out in San Jose

Nov 21–Dec 12

Across California the window opens between November 20 and November 19. Find your city below; the dates follow each town's own average last frost.

Start indoors, San Jose: Oct 10–Nov 7
Plant out, San Jose: Nov 21–Dec 12
Last frost, San Jose: Jan 2

Start seeds indoors 8–12 weeks before the last frost; plant out 3–6 weeks before the last frost. Northern gardens need long-day varieties and southern gardens need short-day ones. A wrong pick gives small bulbs.

Onions planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost

JanFebMarAprMayJunJulAugSepOctNovDec

San JoseNov 21–Dec 12

FresnoDec 3–Dec 24

SacramentoDec 1–Dec 22

BakersfieldDec 20–Jan 10

StocktonDec 25–Jan 15

RiversideNov 28–Dec 19

IrvineNov 24–Dec 15

FremontNov 20–Dec 11

San BernardinoDec 16–Jan 6

FontanaNov 23–Dec 14

ModestoDec 20–Jan 10

Moreno ValleyDec 16–Jan 6

GlendaleNov 21–Dec 12

OntarioNov 23–Dec 14

Elk GroveDec 22–Jan 12

Santa RosaJan 14–Feb 4

Rancho CucamongaNov 23–Dec 14

OceansideDec 12–Jan 2

LancasterFeb 20–Mar 13

RosevilleJan 11–Feb 1

PalmdaleJan 27–Feb 17

CoronaDec 6–Dec 27

SalinasDec 18–Jan 8

HaywardNov 21–Dec 12

SunnyvaleNov 25–Dec 16

PomonaNov 27–Dec 18

VisaliaDec 12–Jan 2

EscondidoNov 21–Dec 12

VictorvilleFeb 4–Feb 25

PasadenaNov 27–Dec 18

All 274 cities

City	Start indoors	Plant out	Last frost
San Jose	Oct 10 to Nov 7	Nov 21 to Dec 12	Jan 2
Fresno	Oct 22 to Nov 19	Dec 3 to Dec 24	Jan 14
Sacramento	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Bakersfield	Nov 8 to Dec 6	Dec 20 to Jan 10	Jan 31
Stockton	Nov 13 to Dec 11	Dec 25 to Jan 15	Feb 5
Riverside	Oct 17 to Nov 14	Nov 28 to Dec 19	Jan 9
Irvine	Oct 13 to Nov 10	Nov 24 to Dec 15	Jan 5
Fremont	Oct 9 to Nov 6	Nov 20 to Dec 11	Jan 1
San Bernardino	Nov 4 to Dec 2	Dec 16 to Jan 6	Jan 27
Fontana	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Modesto	Nov 8 to Dec 6	Dec 20 to Jan 10	Jan 31
Moreno Valley	Nov 4 to Dec 2	Dec 16 to Jan 6	Jan 27
Glendale	Oct 10 to Nov 7	Nov 21 to Dec 12	Jan 2
Ontario	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Elk Grove	Nov 10 to Dec 8	Dec 22 to Jan 12	Feb 2
Santa Rosa	Dec 3 to Dec 31	Jan 14 to Feb 4	Feb 25
Rancho Cucamonga	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Oceanside	Oct 31 to Nov 28	Dec 12 to Jan 2	Jan 23
Lancaster	Jan 9 to Feb 6	Feb 20 to Mar 13	Apr 3
Roseville	Nov 30 to Dec 28	Jan 11 to Feb 1	Feb 22
Palmdale	Dec 16 to Jan 13	Jan 27 to Feb 17	Mar 10
Corona	Oct 25 to Nov 22	Dec 6 to Dec 27	Jan 17
Salinas	Nov 6 to Dec 4	Dec 18 to Jan 8	Jan 29
Hayward	Oct 10 to Nov 7	Nov 21 to Dec 12	Jan 2
Sunnyvale	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Pomona	Oct 16 to Nov 13	Nov 27 to Dec 18	Jan 8
Visalia	Oct 31 to Nov 28	Dec 12 to Jan 2	Jan 23
Escondido	Oct 10 to Nov 7	Nov 21 to Dec 12	Jan 2
Victorville	Dec 24 to Jan 21	Feb 4 to Feb 25	Mar 18
Pasadena	Oct 16 to Nov 13	Nov 27 to Dec 18	Jan 8
Santa Clara	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Clovis	Oct 22 to Nov 19	Dec 3 to Dec 24	Jan 14
Simi Valley	Nov 1 to Nov 29	Dec 13 to Jan 3	Jan 24
Vallejo	Oct 25 to Nov 22	Dec 6 to Dec 27	Jan 17
Concord	Oct 17 to Nov 14	Nov 28 to Dec 19	Jan 9
Fairfield	Oct 23 to Nov 20	Dec 4 to Dec 25	Jan 15
Thousand Oaks	Oct 8 to Nov 5	Nov 19 to Dec 10	Dec 31
Berkeley	Oct 11 to Nov 8	Nov 22 to Dec 13	Jan 3
Antioch	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Menifee	Nov 5 to Dec 3	Dec 17 to Jan 7	Jan 28
Temecula	Nov 10 to Dec 8	Dec 22 to Jan 12	Feb 2
Richmond	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Murrieta	Nov 10 to Dec 8	Dec 22 to Jan 12	Feb 2
Santa Maria	Nov 12 to Dec 10	Dec 24 to Jan 14	Feb 4
Jurupa Valley	Oct 17 to Nov 14	Nov 28 to Dec 19	Jan 9
Rialto	Oct 18 to Nov 15	Nov 29 to Dec 20	Jan 10
West Covina	Oct 16 to Nov 13	Nov 27 to Dec 18	Jan 8
Chico	Dec 10 to Jan 7	Jan 21 to Feb 11	Mar 4
El Monte	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Vacaville	Nov 26 to Dec 24	Jan 7 to Jan 28	Feb 18
San Mateo	Oct 6 to Nov 3	Nov 17 to Dec 8	Dec 29
Burbank	Oct 10 to Nov 7	Nov 21 to Dec 12	Jan 2
Hesperia	Dec 6 to Jan 3	Jan 17 to Feb 7	Feb 28
Tracy	Dec 3 to Dec 31	Jan 14 to Feb 4	Feb 25
El Cajon	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Daly City	Oct 7 to Nov 4	Nov 18 to Dec 9	Dec 30
Merced	Dec 9 to Jan 6	Jan 20 to Feb 10	Mar 3
Vista	Nov 7 to Dec 5	Dec 19 to Jan 9	Jan 30
Chino	Oct 25 to Nov 22	Dec 6 to Dec 27	Jan 17
Manteca	Nov 14 to Dec 12	Dec 26 to Jan 16	Feb 6
Arden-Arcade	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
San Marcos	Oct 10 to Nov 7	Nov 21 to Dec 12	Jan 2
Indio	Oct 8 to Nov 5	Nov 19 to Dec 10	Dec 31
Redding	Dec 9 to Jan 6	Jan 20 to Feb 10	Mar 3
Hemet	Nov 8 to Dec 6	Dec 20 to Jan 10	Jan 31
Folsom	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Carson	Oct 17 to Nov 14	Nov 28 to Dec 19	Jan 9
Mission Viejo	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Rancho Cordova	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Santa Barbara	Oct 21 to Nov 18	Dec 2 to Dec 23	Jan 13
Citrus Heights	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
San Ramon	Dec 14 to Jan 11	Jan 25 to Feb 15	Mar 8
Mountain View	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
San Leandro	Oct 15 to Nov 12	Nov 26 to Dec 17	Jan 7
Livermore	Nov 23 to Dec 21	Jan 4 to Jan 25	Feb 15
Perris	Nov 5 to Dec 3	Dec 17 to Jan 7	Jan 28
Redwood City	Oct 25 to Nov 22	Dec 6 to Dec 27	Jan 17
Alhambra	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Upland	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Milpitas	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Carmichael	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Pittsburg	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Chino Hills	Oct 25 to Nov 22	Dec 6 to Dec 27	Jan 17
Alameda	Oct 15 to Nov 12	Nov 26 to Dec 17	Jan 7
Rocklin	Dec 3 to Dec 31	Jan 14 to Feb 4	Feb 25
Napa	Nov 20 to Dec 18	Jan 1 to Jan 22	Feb 12
Apple Valley	Dec 24 to Jan 21	Feb 4 to Feb 25	Mar 18
Lake Elsinore	Nov 5 to Dec 3	Dec 17 to Jan 7	Jan 28
Pleasanton	Nov 23 to Dec 21	Jan 4 to Jan 25	Feb 15
Redlands	Nov 4 to Dec 2	Dec 16 to Jan 6	Jan 27
Tulare	Oct 31 to Nov 28	Dec 12 to Jan 2	Jan 23
Turlock	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Dublin	Nov 23 to Dec 21	Jan 4 to Jan 25	Feb 15
Eastvale	Oct 25 to Nov 22	Dec 6 to Dec 27	Jan 17
Walnut Creek	Oct 15 to Nov 12	Nov 26 to Dec 17	Jan 7
Yuba City	Oct 23 to Nov 20	Dec 4 to Dec 25	Jan 15
Lodi	Nov 17 to Dec 15	Dec 29 to Jan 19	Feb 9
Madera	Nov 20 to Dec 18	Jan 1 to Jan 22	Feb 12
Baldwin Park	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Camarillo	Oct 8 to Nov 5	Nov 19 to Dec 10	Dec 31
Palo Alto	Nov 9 to Dec 7	Dec 21 to Jan 11	Feb 1
Brentwood	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Davis	Nov 18 to Dec 16	Dec 30 to Jan 20	Feb 10
Castro Valley	Oct 10 to Nov 7	Nov 21 to Dec 12	Jan 2
Union City	Oct 15 to Nov 12	Nov 26 to Dec 17	Jan 7
South San Francisco	Oct 6 to Nov 3	Nov 17 to Dec 8	Dec 29
Laguna Niguel	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Porterville	Oct 28 to Nov 25	Dec 9 to Dec 30	Jan 20
Woodland	Nov 15 to Dec 13	Dec 27 to Jan 17	Feb 7
Hanford	Nov 15 to Dec 13	Dec 27 to Jan 17	Feb 7
San Clemente	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Santa Cruz	Nov 6 to Dec 4	Dec 18 to Jan 8	Jan 29
Beaumont	Nov 8 to Dec 6	Dec 20 to Jan 10	Jan 31
Gilroy	Dec 2 to Dec 30	Jan 13 to Feb 3	Feb 24
Montebello	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
La Mesa	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Petaluma	Dec 6 to Jan 3	Jan 17 to Feb 7	Feb 28
San Rafael	Oct 19 to Nov 16	Nov 30 to Dec 21	Jan 11
Pico Rivera	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Cupertino	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Santee	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Highland	Nov 4 to Dec 2	Dec 16 to Jan 6	Jan 27
Monterey Park	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Lincoln	Dec 3 to Dec 31	Jan 14 to Feb 4	Feb 25
West Sacramento	Nov 10 to Dec 8	Dec 22 to Jan 12	Feb 2
San Jacinto	Nov 8 to Dec 6	Dec 20 to Jan 10	Jan 31
Yucaipa	Nov 4 to Dec 2	Dec 16 to Jan 6	Jan 27
Arcadia	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Colton	Oct 18 to Nov 15	Nov 29 to Dec 20	Jan 10
Palm Desert	Oct 8 to Nov 5	Nov 19 to Dec 10	Dec 31
Cathedral City	Oct 17 to Nov 14	Nov 28 to Dec 19	Jan 9
Delano	Nov 8 to Dec 6	Dec 20 to Jan 10	Jan 31
Novato	Oct 19 to Nov 16	Nov 30 to Dec 21	Jan 11
Diamond Bar	Oct 16 to Nov 13	Nov 27 to Dec 18	Jan 8
Watsonville	Nov 5 to Dec 3	Dec 17 to Jan 7	Jan 28
San Luis Obispo	Nov 8 to Dec 6	Dec 20 to Jan 10	Jan 31
El Dorado Hills	Jan 6 to Feb 3	Feb 17 to Mar 10	Mar 31
Aliso Viejo	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Glendora	Oct 16 to Nov 13	Nov 27 to Dec 18	Jan 8
Los Banos	Nov 3 to Dec 1	Dec 15 to Jan 5	Jan 26
Florin	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Rosemead	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Covina	Oct 16 to Nov 13	Nov 27 to Dec 18	Jan 8
Poway	Oct 13 to Nov 10	Nov 24 to Dec 15	Jan 5
Antelope	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Ceres	Nov 8 to Dec 6	Dec 20 to Jan 10	Jan 31
North Highlands	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Newark	Oct 9 to Nov 6	Nov 20 to Dec 11	Jan 1
Oakley	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Azusa	Oct 16 to Nov 13	Nov 27 to Dec 18	Jan 8
Hollister	Nov 27 to Dec 25	Jan 8 to Jan 29	Feb 19
Morgan Hill	Dec 2 to Dec 30	Jan 13 to Feb 3	Feb 24
Coachella	Oct 8 to Nov 5	Nov 19 to Dec 10	Dec 31
Palm Springs	Oct 9 to Nov 6	Nov 20 to Dec 11	Jan 1
Rohnert Park	Dec 3 to Dec 31	Jan 14 to Feb 4	Feb 25
El Centro	Oct 11 to Nov 8	Nov 22 to Dec 13	Jan 3
Lompoc	Oct 28 to Nov 25	Dec 9 to Dec 30	Jan 20
Danville	Dec 14 to Jan 11	Jan 25 to Feb 15	Mar 8
Lathrop	Nov 14 to Dec 12	Dec 26 to Jan 16	Feb 6
Vineyard	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
French Valley	Nov 10 to Dec 8	Dec 22 to Jan 12	Feb 2
Campbell	Nov 10 to Dec 8	Dec 22 to Jan 12	Feb 2
San Bruno	Oct 19 to Nov 16	Nov 30 to Dec 21	Jan 11
Altadena	Oct 16 to Nov 13	Nov 27 to Dec 18	Jan 8
Rancho Palos Verdes	Oct 17 to Nov 14	Nov 28 to Dec 19	Jan 9
La Quinta	Oct 8 to Nov 5	Nov 19 to Dec 10	Dec 31
Adelanto	Dec 24 to Jan 21	Feb 4 to Feb 25	Mar 18
Calexico	Oct 11 to Nov 8	Nov 22 to Dec 13	Jan 3
Monrovia	Feb 3 to Mar 3	Mar 17 to Apr 7	Apr 28
San Gabriel	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Wildomar	Nov 5 to Dec 3	Dec 17 to Jan 7	Jan 28
Montclair	Oct 16 to Nov 13	Nov 27 to Dec 18	Jan 8
Foothill Farms	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Pacifica	Oct 19 to Nov 16	Nov 30 to Dec 21	Jan 11
Martinez	Dec 6 to Jan 3	Jan 17 to Feb 7	Feb 28
La Puente	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Claremont	Oct 16 to Nov 13	Nov 27 to Dec 18	Jan 8
Orangevale	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Temple City	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
San Juan Capistrano	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Moorpark	Oct 8 to Nov 5	Nov 19 to Dec 10	Dec 31
Oildale	Nov 8 to Dec 6	Dec 20 to Jan 10	Jan 31
Pleasant Hill	Oct 15 to Nov 12	Nov 26 to Dec 17	Jan 7
Desert Hot Springs	Dec 3 to Dec 31	Jan 14 to Feb 4	Feb 25
San Dimas	Oct 16 to Nov 13	Nov 27 to Dec 18	Jan 8
Menlo Park	Nov 9 to Dec 7	Dec 21 to Jan 11	Feb 1
Los Gatos	Nov 10 to Dec 8	Dec 22 to Jan 12	Feb 2
Fallbrook	Nov 10 to Dec 8	Dec 22 to Jan 12	Feb 2
Foster City	Oct 25 to Nov 22	Dec 6 to Dec 27	Jan 17
Goleta	Oct 19 to Nov 16	Nov 30 to Dec 21	Jan 11
Dana Point	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Spring Valley	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Atwater	Dec 9 to Jan 6	Jan 20 to Feb 10	Mar 3
Fair Oaks	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Burlingame	Oct 6 to Nov 3	Nov 17 to Dec 8	Dec 29
Banning	Nov 8 to Dec 6	Dec 20 to Jan 10	Jan 31
Santa Paula	Oct 8 to Nov 5	Nov 19 to Dec 10	Dec 31
San Pablo	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Seaside	Oct 10 to Nov 7	Nov 21 to Dec 12	Jan 2
El Paso de Robles	Dec 21 to Jan 18	Feb 1 to Feb 22	Mar 15
Orcutt	Nov 12 to Dec 10	Dec 24 to Jan 14	Feb 4
Los Altos	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Saratoga	Nov 10 to Dec 8	Dec 22 to Jan 12	Feb 2
La Verne	Oct 16 to Nov 13	Nov 27 to Dec 18	Jan 8
Laguna Hills	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Atascadero	Dec 21 to Jan 18	Feb 1 to Feb 22	Mar 15
Suisun City	Oct 23 to Nov 20	Dec 4 to Dec 25	Jan 15
San Lorenzo	Oct 10 to Nov 7	Nov 21 to Dec 12	Jan 2
Eastern Goleta Valley	Oct 19 to Nov 16	Nov 30 to Dec 21	Jan 11
San Carlos	Oct 25 to Nov 22	Dec 6 to Dec 27	Jan 17
Monterey	Oct 9 to Nov 6	Nov 20 to Dec 11	Jan 1
East Palo Alto	Nov 9 to Dec 7	Dec 21 to Jan 11	Feb 1
Belmont	Oct 25 to Nov 22	Dec 6 to Dec 27	Jan 17
East Niles	Nov 8 to Dec 6	Dec 20 to Jan 10	Jan 31
Temescal Valley	Nov 5 to Dec 3	Dec 17 to Jan 7	Jan 28
Ridgecrest	Dec 17 to Jan 14	Jan 28 to Feb 18	Mar 11
Brawley	Oct 24 to Nov 21	Dec 5 to Dec 26	Jan 16
Walnut	Oct 16 to Nov 13	Nov 27 to Dec 18	Jan 8
Lemoore	Dec 2 to Dec 30	Jan 13 to Feb 3	Feb 24
Sanger	Nov 7 to Dec 5	Dec 19 to Jan 9	Jan 30
Reedley	Nov 7 to Dec 5	Dec 19 to Jan 9	Jan 30
Galt	Nov 17 to Dec 15	Dec 29 to Jan 19	Feb 9
Patterson	Nov 8 to Dec 6	Dec 20 to Jan 10	Jan 31
Riverbank	Nov 8 to Dec 6	Dec 20 to Jan 10	Jan 31
Wasco	Nov 8 to Dec 6	Dec 20 to Jan 10	Jan 31
Benicia	Oct 25 to Nov 22	Dec 6 to Dec 27	Jan 17
Soledad	Jan 29 to Feb 26	Mar 12 to Apr 2	Apr 23
Hercules	Oct 25 to Nov 22	Dec 6 to Dec 27	Jan 17
El Cerrito	Oct 11 to Nov 8	Nov 22 to Dec 13	Jan 3
Dinuba	Oct 31 to Nov 28	Dec 12 to Jan 2	Jan 23
Twentynine Palms	Nov 1 to Nov 29	Dec 13 to Jan 3	Jan 24
Windsor	Dec 8 to Jan 5	Jan 19 to Feb 9	Mar 2
South Pasadena	Oct 16 to Nov 13	Nov 27 to Dec 18	Jan 8
West Whittier-Los Nietos	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Mountain House	Oct 27 to Nov 24	Dec 8 to Dec 29	Jan 19
Lafayette	Oct 15 to Nov 12	Nov 26 to Dec 17	Jan 7
Eureka	Nov 30 to Dec 28	Jan 11 to Feb 1	Feb 22
Loma Linda	Nov 4 to Dec 2	Dec 16 to Jan 6	Jan 27
Norco	Oct 25 to Nov 22	Dec 6 to Dec 27	Jan 17
Barstow	Nov 30 to Dec 28	Jan 11 to Feb 1	Feb 22
Selma	Nov 7 to Dec 5	Dec 19 to Jan 9	Jan 30
Bloomington	Oct 18 to Nov 15	Nov 29 to Dec 20	Jan 10
Bay Point	Oct 17 to Nov 14	Nov 28 to Dec 19	Jan 9
Shafter	Nov 28 to Dec 26	Jan 9 to Jan 30	Feb 20
Ladera Ranch	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
East San Gabriel	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
San Fernando	Oct 10 to Nov 7	Nov 21 to Dec 12	Jan 2
Rosemont	Oct 20 to Nov 17	Dec 1 to Dec 22	Jan 12
Marina	Nov 12 to Dec 10	Dec 24 to Jan 14	Feb 4
Oakdale	Nov 8 to Dec 6	Dec 20 to Jan 10	Jan 31
Linda	Nov 19 to Dec 17	Dec 31 to Jan 21	Feb 11
Millbrae	Oct 6 to Nov 3	Nov 17 to Dec 8	Dec 29
Duarte	Feb 3 to Mar 3	Mar 17 to Apr 7	Apr 28
Ramona	Dec 25 to Jan 22	Feb 5 to Feb 26	Mar 19
Ashland	Oct 10 to Nov 7	Nov 21 to Dec 12	Jan 2
American Canyon	Dec 11 to Jan 8	Jan 22 to Feb 12	Mar 5
Laguna Beach	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Corcoran	Nov 23 to Dec 21	Jan 4 to Jan 25	Feb 15
Imperial	Oct 22 to Nov 19	Dec 3 to Dec 24	Jan 14
Rancho San Diego	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
West Puente Valley	Oct 12 to Nov 9	Nov 23 to Dec 14	Jan 4
Calabasas	Nov 1 to Nov 29	Dec 13 to Jan 3	Jan 24
Winter Gardens	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
West Carson	Oct 17 to Nov 14	Nov 28 to Dec 19	Jan 9
Yucca Valley	Dec 20 to Jan 17	Jan 31 to Feb 21	Mar 14
Lakeside	Oct 14 to Nov 11	Nov 25 to Dec 16	Jan 6
Valinda	Oct 16 to Nov 13	Nov 27 to Dec 18	Jan 8
Granite Bay	Dec 3 to Dec 31	Jan 14 to Feb 4	Feb 25
Stevenson Ranch	Oct 16 to Nov 13	Nov 27 to Dec 18	Jan 8
Greenfield	Dec 1 to Dec 29	Jan 12 to Feb 2	Feb 23
Dixon	Nov 18 to Dec 16	Dec 30 to Jan 20	Feb 10
Rosamond	Jan 9 to Feb 6	Feb 20 to Mar 13	Apr 3
Oroville	Nov 7 to Dec 5	Dec 19 to Jan 9	Jan 30
East Hemet	Oct 18 to Nov 15	Nov 29 to Dec 20	Jan 10

Questions

When should I plant onions in California?

In San Jose, plant out from November 21 to December 12. Across California the window opens between November 20 and November 19, depending on the local last frost.

How is this date worked out?

Start seeds indoors 8–12 weeks before the last frost; plant out 3–6 weeks before the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for California

Onions in other states

Frost dates for every city in California