Planting planner: Vallejo, California
Typical last spring frost March 5 (1 spring in 10 later than April 16). Typical first fall frost November 21 (1 fall in 10 earlier than November 3). Growing season about 256 days.
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We don't give a garlic date here. The rule we use, from the University of Minnesota Extension, counts from the first killing frost, and it works where a hard freeze comes every year before the ground freezes. Your county's extension office can tell you when to plant garlic in your climate.
January
- January 1 to 29: Cauliflower (start seeds indoors)
- January 15 to February 5: Eggplant (start seeds indoors)
- January 22 to February 5: Peppers (start seeds indoors)
- January 29 to February 12: Tomatoes (start seeds indoors)
February
- February 5 to 19: Peas, spinach, lettuce, radishes, onion sets, turnips (sow outdoors)
- February 5 to 19: Broccoli and cabbage (plant out)
- February 19 to March 5: Beets, carrots, potatoes, Swiss chard (plant outdoors)
- February 19 to March 5: Cauliflower (plant out)
March
- March 5: Snap beans, sweet corn, cucumbers, summer squash (sow outdoors)
- March 19: Tomatoes, peppers, eggplant (plant out)
- March 19: Melons, winter squash, pumpkins, lima beans (sow outdoors)
April
Nothing to start this month.
May
Nothing to start this month.
June
- June 26 to July 10: Cabbage for fall (start seeds)
July
- July 16 to 30: Broccoli for fall (start seeds)
August
- August 25: Snap beans for fall (last date to sow)
- August 29: Carrots for fall (last date to sow)
- August 30: Cucumbers for fall (last date to sow)
September
- September 3: Peas for fall (last date to sow)
- September 4: Summer squash for fall (last date to sow)
- September 8: Leaf lettuce and beets for fall (last date to sow)
- September 18: Turnips and kohlrabi for fall (last date to sow)
- September 28: Spinach for fall (last date to sow)
October
- October 8: Radishes for fall (last date to sow)
November
- November 3: Tomatoes, peppers, squash, melons, cucumbers (watch the forecast)
December
- December 18 to January 15: Broccoli and cabbage (start seeds indoors)
Dates from NOAA's 1991 to 2020 climate normals for Napa Co Airport (station USW00093227), 7 miles from the center of Vallejo. Planting rules: Colorado State University Extension GardenNotes #720 (spring), Virginia Cooperative Extension 426-334 (fall crops), University of Minnesota Extension (garlic). Spring bulbs: plant when the soil has cooled to about 50 to 55°F, until a couple of weeks before the ground freezes (University of Wisconsin–Madison Extension). Full details: https://lastfrostdate.com/frost-dates/california/vallejo/