Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Port costa, CA, based on the USDA Hardiness Zone 9b.
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Port costa, CA Frost Dates & Growing Season
Last Spring Frost Date for Port costa, CA
The average last frost date in spring for Port costa is February 20th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until March 6th before moving plants outdoors. Waiting these extra few weeks significantly reduces the risk of a late freeze damaging young transplants.
First Fall Frost Date for Port costa, CA
The average first frost date in fall for Port costa is December 1st. This date marks the approximate end of the growing season for tender plants. Gardeners should plan to harvest frost-sensitive vegetables or provide heavy protection (such as row covers) before this date to avoid crop loss.
Growing Season Length in Port costa, CA
Based on historical frost data, the estimated growing season length in Port costa is approximately 284 days. This duration determines which vegetable varieties have enough time to reach maturity before the winter cold sets in. Short-season varieties are recommended for crops that require a longer warm period.
Please note: These dates are climatological averages. Actual weather conditions vary by year. Always check the local 10-day forecast before planting.
Port costa, CA Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Port costa, CA Monthly Planting Recommendations
January
In January, recommended activities include direct sowing Bok Choy (from January 23rd to February 6th), direct sowing California Poppy (from January 23rd to February 6th), and starting Marigold seeds indoors (from January 9th to January 23rd).
February
In February, recommended activities include direct sowing Zucchini (from February 27th to March 13th), direct sowing Anise (from February 27th to March 6th), and direct sowing Fenugreek (from February 20th to March 6th).
March
In March, recommended activities include direct sowing Lima Bean (from March 6th to March 20th), direct sowing Okra (from March 6th to March 20th), and direct sowing Black Bean (from March 6th to March 20th).
December
In December, recommended activities include starting Rosemary seeds indoors (from December 12th to December 26th), starting Lavender seeds indoors (from December 12th to December 26th), and starting Coneflower seeds indoors (from December 26th to January 9th).