Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Portola, CA, based on the USDA Hardiness Zone 6b.
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Portola, CA Frost Dates & Growing Season
Last Spring Frost Date for Portola, CA
The average last frost date in spring for Portola is June 18th. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until July 2nd 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 Portola, CA
The average first frost date in fall for Portola is September 10th. 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 Portola, CA
Based on historical frost data, the estimated growing season length in Portola is approximately 84 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.
Portola, CA Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Portola, CA Monthly Planting Recommendations
April
In April, recommended activities include starting Tomatillo seeds indoors (from April 23rd to May 7th), starting Petunia seeds indoors (from April 9th to April 23rd), and starting Aubergine seeds indoors (from April 23rd to May 7th).
May
In May, recommended activities include direct sowing Arugula (from May 21st to June 4th), direct sowing Sorrel (from May 21st to June 4th), and direct sowing Carrot (from May 28th to June 11th).
June
In June, recommended activities include direct sowing Calendula (from June 4th to June 18th), direct sowing Fenugreek (from June 18th to July 2nd), and direct sowing Cilantro (from June 4th to July 2nd).
July
In July, recommended activities include direct sowing Okra (from July 2nd to July 16th) and direct sowing Lima Bean (from July 2nd to July 16th).