Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in San dimas, CA, based on the USDA Hardiness Zone 10a.
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San dimas, CA Frost Dates & Growing Season
Last Spring Frost Date for San dimas, CA
The average last frost date in spring for San dimas is January 15th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until January 29th 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 San dimas, CA
The average first frost date in fall for San dimas is December 15th. 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 San dimas, CA
Based on historical frost data, the estimated growing season length in San dimas is approximately 334 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.
San dimas, CA Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
San dimas, CA Monthly Planting Recommendations
January
In January, recommended activities include direct sowing Morning Glory (from January 22nd to February 5th), direct sowing Jute (from January 29th to February 12th), and direct sowing Mung Bean (from January 29th to February 12th).
November
In November, recommended activities include starting Tomato seeds indoors (from November 20th to December 4th), starting Black Eyed Susan seeds indoors (from November 20th to December 4th), and starting Ground Cherry seeds indoors (from November 20th to December 4th).
December
In December, recommended activities include direct sowing Watercress (from December 18th to January 1st), starting Sage seeds indoors (from December 4th to December 18th), and direct sowing Arugula (from December 18th to January 1st).