Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Walnut, CA, based on the USDA Hardiness Zone 10a.
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Walnut, CA Frost Dates & Growing Season
Last Spring Frost Date for Walnut, CA
The average last frost date in spring for Walnut is February 1st. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until February 15th 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 Walnut, CA
The average first frost date in fall for Walnut 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 Walnut, CA
Based on historical frost data, the estimated growing season length in Walnut is approximately 317 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.
Walnut, CA Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Walnut, CA Monthly Planting Recommendations
January
In January, recommended activities include direct sowing Chervil (from January 4th to January 18th), direct sowing Chives (from January 4th to January 18th), and direct sowing Lentil (from January 18th to February 1st).
February
In February, recommended activities include direct sowing Sunflower (from February 8th to February 22nd), direct sowing Lima Bean (from February 15th to March 1st), and direct sowing Cucumber (from February 8th to February 22nd).
November
In November, recommended activities include starting Lavender seeds indoors (from November 23rd to December 7th), starting Leek seeds indoors (from November 23rd to December 7th), and starting Geranium seeds indoors (from November 23rd to December 7th).
December
In December, recommended activities include starting Sage seeds indoors (from December 21st to January 4th), starting Broccoli seeds indoors (from December 7th to December 21st), and starting Tomatillo seeds indoors (from December 7th to December 21st).