Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Concord, CA, based on the USDA Hardiness Zone 9b.
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Concord, CA Frost Dates & Growing Season
Last Spring Frost Date for Concord, CA
The average last frost date in spring for Concord is March 5th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until March 19th 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 Concord, CA
The average first frost date in fall for Concord 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 Concord, CA
Based on historical frost data, the estimated growing season length in Concord is approximately 271 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.
Concord, CA Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Concord, CA Monthly Planting Recommendations
January
In January, recommended activities include starting Coleus seeds indoors (from January 8th to January 22nd), starting Black Eyed Susan seeds indoors (from January 8th to January 22nd), and starting Tomatillo seeds indoors (from January 8th to January 22nd).
February
In February, recommended activities include direct sowing Fennel (from February 19th to March 5th), direct sowing Chives (from February 5th to February 19th), and direct sowing Parsley (from February 5th to February 19th).
March
In March, recommended activities include direct sowing Zucchini (from March 12th to March 26th), direct sowing Okra (from March 19th to April 2nd), and direct sowing Chia (from March 19th to April 2nd).
December
In December, recommended activities include starting French Lavender seeds indoors (from December 25th to January 8th), starting Rosemary seeds indoors (from December 25th to January 8th), and starting Snapdragon seeds indoors (from December 25th to January 8th).