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Stockton, California planting calendar and frost dates

Stockton is in USDA hardiness zone 9b. The last spring frost typically comes around February 6 and the first fall frost around December 1, giving about 304 frost-free days a year.

Hardiness zone
Zone 9b
Typical last frost
February 6
Typical first frost
December 1
Frost-free season
304 days

Frost dates in Stockton

Last spring frost

  • December 31Risky: frost later than this in 9 years out of 10
  • February 6Typical: a later frost in half of years
  • February 28Safe: a later frost only 1 year in 10

First fall frost

  • November 15Risky: frost earlier than this 1 year in 10
  • December 1Typical: an earlier frost in half of years
  • December 26Late: frost before this in 9 years out of 10

The growing season between the typical last and first frosts is about 304 days. Frost here means a low of 32°F at the weather station. A hard freeze (28°F), which damages most hardy crops too, typically ends around January 10 and returns around December 16.

NOAA U.S. Climate Normals 1991-2020 for Stockton Metro Airport, 5.9 miles SE of the city center. Low-lying and rural spots often frost later in spring and earlier in fall than airports and city centers.

What to plant each month in Stockton

  1. January

    Start indoors: cilantro, ginger, marigolds, nasturtiums, peppers, ranunculus, spinach, swiss chard

    Plant or sow outdoors: asparagus, beets, black-eyed susans, blackberries, blueberries, broccoli, cabbages, carrots, cauliflower, chives, cilantro, collard greens, dahlias, dill, figs, garlic, gladioli, grapes, grass seed, green onions, hollyhocks, kale, kentucky bluegrass, leeks, lettuce, onions, parsley, peas, poppies, radishes, ranunculus, raspberries, rhubarb, roses, snapdragons, spinach, strawberries, sweet peas, swiss chard, tall fescue, turnips, wildflowers

  2. February

    Start indoors: basil, celery, eggplants, peppers, tomatoes

    Plant or sow outdoors: asparagus, avocados, beets, carrots, chives, cilantro, dahlias, dill, figs, garden mums, gladioli, grapes, green onions, lavenders, leeks, lettuce, lilies, marigolds, mints, nasturtiums, oregano, parsley, petunias, potatoes, ranunculus, rosemary, roses, sage, snapdragons, spinach, sunflowers, sweet corn, swiss chard, thyme

  3. March

    Start indoors: basil, cantaloupes, cosmos, cucumbers, okra, pumpkins, tomatoes, watermelons, winter squash, zucchini

    Plant or sow outdoors: avocados, garden mums, ginger, green onions, st. augustinegrass

  4. April

    Start indoors: cosmos, okra, zinnias

    Plant or sow outdoors: basil, cantaloupes, cucumbers, eggplants, green beans, peppers, pumpkins, st. augustinegrass, tomatoes, watermelons, winter squash, zucchini

  5. May

    Start indoors: zinnias

    Plant or sow outdoors: bermudagrass, celery, centipedegrass, cosmos, okra, peanuts, sweet potatoes, zinnias, zoysiagrass

  6. June

    Plant or sow outdoors: bermudagrass, centipedegrass, zinnias, zoysiagrass

  7. August

    Plant for fall: brussels sprouts, peppers, potatoes, sweet corn, tomatoes

  8. September

    Plant for fall: bearded irises, beets, broccoli, brussels sprouts, cabbages, carrots, cauliflower, collard greens, cucumbers, daylilies, green beans, kale, lettuce, peas, peppers, radishes, snapdragons, spinach, sweet corn, swiss chard, turnips, zucchini

  9. October

    Start indoors: onions

    Plant for fall: azaleas, bearded irises, beets, broccoli, cabbages, cauliflower, clematis, coneflowers, crocuses, daffodils, daylilies, grass seed, hostas, hydrangeas, kale, kentucky bluegrass, lettuce, lilies, ornamental alliums, peonies, perennial ryegrass, radishes, roses, saffron, snapdragons, spinach, tall fescue, tulips, turnips

  10. November

    Start indoors: broccoli, cabbages, cauliflower, collard greens, kale, leeks, onions, oregano, parsley, petunias, ranunculus, rosemary, snapdragons

    Plant for fall: crocuses, daffodils, daylilies, grass seed, hostas, hyacinths, kale, kentucky bluegrass, lilies, ornamental alliums, peonies, perennial ryegrass, radishes, saffron, tall fescue, tulips

  11. December

    Start indoors: black-eyed susans, broccoli, cabbages, cauliflower, chives, cilantro, collard greens, kale, leeks, lettuce, marigolds, nasturtiums, oregano, parsley, petunias, ranunculus, rosemary, sage, snapdragons, spinach, swiss chard

    Plant or sow outdoors: asparagus, black-eyed susans, blueberries, garlic, grapes, grass seed, green onions, hollyhocks, kentucky bluegrass, onions, peas, poppies, raspberries, rhubarb, strawberries, sweet peas, tall fescue, turnips, wildflowers

    Plant for fall: crocuses, daffodils, garlic, hyacinths, lilies, ornamental alliums, peonies, tulips

Frost dates and zones by ZIP code in Stockton

All 10 of Stockton's main ZIP codes take their frost dates from Stockton Metro Airport, so the dates on this page apply across the city. Every one of them is in zone 9b.

ZIP codeZoneWeather stationTypical last frostTypical first frost
952039bStockton Metro Airport, 5.9 mi SEFeb 6Dec 1
952049bStockton Metro Airport, 5.9 mi SEFeb 6Dec 1
952059bStockton Metro Airport, 5.9 mi SEFeb 6Dec 1
952069bStockton Metro Airport, 5.9 mi SEFeb 6Dec 1
952079bStockton Metro Airport, 5.9 mi SEFeb 6Dec 1
952099bStockton Metro Airport, 5.9 mi SEFeb 6Dec 1
952109bStockton Metro Airport, 5.9 mi SEFeb 6Dec 1
952129bStockton Metro Airport, 5.9 mi SEFeb 6Dec 1
952159bStockton Metro Airport, 5.9 mi SEFeb 6Dec 1
952199bStockton Metro Airport, 5.9 mi SEFeb 6Dec 1

Stockton Metro Airport also supplies the frost dates for Manteca, so their planting calendars match Stockton's.

Planting dates for popular crops in Stockton

PlantStart indoorsPlant or sow outdoorsFall planting
TomatoesFeb 15 to Mar 1Apr 12 to 26Aug 18 to 25
Strawberries—Dec 26 to Jan 9—
LettuceDec 12 to 26Jan 30 to Feb 13Sep 1 to Oct 6
CilantroDec 26 to Jan 9Feb 6 to 13—
BasilFeb 22 to Mar 8Apr 12 to 19—
Potatoes—Feb 2 to 9Aug 11 to 18
Garlic—Dec 26 to Jan 9Dec 1 to 15
OnionsOct 17 to Nov 28Jan 9 to 23—
CucumbersMar 15 to 29Apr 12 to 26Sep 1 to 15
PumpkinsMar 15 to 29Apr 12 to 26—
PeppersJan 25 to Feb 22Apr 12 to 26Aug 11 to Sep 8
Carrots—Jan 16 to Feb 6Sep 8 to 29
Sweet Potatoes—May 4 to 11—
WatermelonsMar 8 to 22Apr 12 to 26—
Sweet Corn—Feb 6 to 20Aug 25 to Sep 8
Green Beans—Apr 12 to 26Sep 8 to 15
ZucchiniMar 15 to 29Apr 12 to 26Sep 8 to 22
BroccoliNov 21 to Dec 12Jan 9 to 23Sep 15 to Oct 13
Peas—Dec 26 to Jan 9Sep 8 to 22
SpinachDec 26 to Jan 2Jan 30 to Feb 13Sep 22 to Oct 27
Sunflowers—Feb 6 to 27—
ZinniasApr 29 to May 6May 27 to Jun 10—
Tulips——Oct 20 to Dec 15
Daffodils——Oct 20 to Dec 1
Grass Seed—Dec 26 to Jan 9Oct 20 to Nov 3

Nearby cities

Planting in CaliforniaAbout zone 9bPrintable calendar for Stockton

Questions

When is the last frost in Stockton?

Around February 6 in a typical year, based on NOAA's 1991-2020 records for Stockton Metro Airport. There is still a 1 in 10 chance of frost after February 28.

What planting zone is Stockton in?

USDA hardiness zone 9b (2023 map). The zone tells you which perennials survive the winter; planting dates depend on frost dates instead.

When should I plant tomatoes in Stockton?

Start seeds indoors February 15 to March 1 and set plants out April 12 to 26.

When is the first frost in Stockton?

Around December 1 in a typical year, and before November 15 about 1 year in 10.