Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Santa rosa, AZ, based on the USDA Hardiness Zone 9b.
On this page:
Santa rosa, AZ Frost Dates & Growing Season
Last Spring Frost Date for Santa rosa, AZ
The average last frost date in spring for Santa rosa is March 1st. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until March 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 Santa rosa, AZ
The average first frost date in fall for Santa rosa is November 25th. 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 Santa rosa, AZ
Based on historical frost data, the estimated growing season length in Santa rosa is approximately 269 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.
Santa rosa, AZ Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Santa rosa, AZ Monthly Planting Recommendations
January
In January, recommended activities include starting Sage seeds indoors (from January 18th to February 1st), starting Cabbage seeds indoors (from January 4th to January 18th), and direct sowing Spinach (from January 18th to February 1st).
February
In February, recommended activities include direct sowing Chervil (from February 1st to February 15th), direct sowing Lettuce (from February 1st to February 15th), and direct sowing Milk Thistle (from February 15th to March 1st).
March
In March, recommended activities include direct sowing Mung Bean (from March 15th to March 29th), direct sowing Morning Glory (from March 8th to March 22nd), and direct sowing Butterfly Pea (from March 15th to March 29th).
December
In December, recommended activities include starting French Lavender seeds indoors (from December 21st to January 4th), starting Artichoke seeds indoors (from December 21st to January 4th), and starting Rosemary seeds indoors (from December 21st to January 4th).