Princeton's Hardiness Zone
Our records indicate the United States Department of Agriculture has given Princeton a growing zone designation of 9b. Sometimes also called the planting zone or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Princeton's climate. If you are looking for plants suitable for growing in the Princeton area, head on over to our page on plants that grow well in Princeton, CA.


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Understanding your growing zone is very important because it is a measure of the lowest temperature that a plant can survive, helping you to decide what plants would grow best in your particular climate. Since Princeton is in growing zone 9b this means that plants there can survive temperatures as low as 10 to 15 degrees Fahrenheit. Plants chosen for Princeton's climate should be chosen with this in mind or plants should be moved inside to keep their core temperature in the right range if necessary.
USDA Growing Zone: 9b
Longitude: -122.0194
Latitude: 39.4016
Lowest Avg Temperatures (F): 25 to 30

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