Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Rio oso, CA, based on the USDA Hardiness Zone 9b.
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Rio oso, CA Frost Dates & Growing Season
Last Spring Frost Date for Rio oso, CA
The average last frost date in spring for Rio oso is March 15th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until March 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 Rio oso, CA
The average first frost date in fall for Rio oso is November 20th. 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 Rio oso, CA
Based on historical frost data, the estimated growing season length in Rio oso is approximately 250 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.
Rio oso, CA Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Rio oso, CA Monthly Planting Recommendations
January
In January, recommended activities include starting Ground Cherry seeds indoors (from January 18th to February 1st), starting Cabbage seeds indoors (from January 18th to February 1st), and starting French Lavender seeds indoors (from January 4th to January 18th).
February
In February, recommended activities include direct sowing Sorrel (from February 15th to March 1st), starting Marigold seeds indoors (from February 1st to February 15th), and starting Sage seeds indoors (from February 1st to February 15th).
March
In March, recommended activities include direct sowing Runner Bean (from March 22nd to April 5th), direct sowing Calendula (from March 1st to March 15th), and direct sowing Fennel (from March 1st to March 15th).