What Growing Zone Is Del Rio?

Our records indicate the United States Department of Agriculture has given Del Rio a growing zone designation of 9b. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Del Rio's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Del Rio's weather data from 1991 - 2020 in their analysis.

map of growing zone 9b (Northern California)map of growing zone 9bLatest CA growing zone map

If you are looking for plants suitable for growing in the Del Rio area, head on over to our page on plants that grow well in Del Rio, CA.

Rustic Iron Garden Trellis

Rustic Iron Garden Trellis

Sturdy trellis for supporting climbing plants and vines.
Hoeing Ain't Easy Garden Sign

Hoeing Ain't Easy Garden Sign

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Metal Seed Storage Box

Metal Seed Storage Box

Organized storage solution for your seed collection.
Shiitake Mushroom Kit

Shiitake Mushroom Kit

Grow your own delicious shiitake mushrooms at home.
Stainless Steel Garden Tool Set

Stainless Steel Garden Tool Set

Complete garden tool set with heavy-duty stainless steel tools for all your gardening needs.
map of growing zone 9b (Northern California)map of growing zone 9bLatest CA growing zone map

The growing zone is a measure of the lowest temperature that a plant can survive based on average lowest year temperatures, helping you to decide what plants would grow best in your particular climate. Since Del Rio is in growing zone 9b this means that plants there can survive temperatures as low as 25 to 30 degrees Fahrenheit. Plants for Del Rio'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 map of the United States

Some zones may have been changed by the USDA as of 2023. To see if the Del Rio area has been affected, refer to this map of half zone changes from the 2012 version of the USDA zones to the 2023 version.

map of usda hardiness zone changes from 2012 to 2023Half zone changes from 2012 to 2023

The updated map shows that over half of the Southeast has warmed by about half a zone. For gardeners, that means you can now grow plants that tolerate a bit more heat and less frost than before. The tan areas reflect this shift. Meanwhile, the white areas had slight temperature changes, but not enough to move them into a new zone. In the Western U.S., a few spots shifted cooler. That’s not due to a colder climate, but because the new map uses a larger dataset, giving a more accurate picture of local conditions. It's important to keep track of these changes when planning your garden!

Hardiness Zone FAQ

Have questions about hardiness zones and what they mean for your garden? Check out our FAQ below for quick answers to common questions about USDA hardiness zones and how they affect plant selection in Del Rio, CA.

The USDA hardiness zone is 9b for Del Rio. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.

Del Rio's Growing Zone Details

USDA Growing Zone: 9b

Zip Codes: 95356

Longitude: -121.0084

Latitude: 37.7432

Lowest Avg Temperatures (F): 25 to 30

Shiitake Mushroom Kit

Shiitake Mushroom Kit

Grow your own delicious shiitake mushrooms at home.
Wooden Chicken Coop

Wooden Chicken Coop

Spacious and secure home for your backyard chickens.
Steel Hori Hori Weeding Knife

Steel Hori Hori Weeding Knife

Versatile Japanese-style gardening knife for weeding and planting.
Reusable Grow Bags

Reusable Grow Bags

Breathable fabric grow bags that promote healthy root growth for your vegetables and fruits.
Worm Composting Kit

Worm Composting Kit

Complete kit for starting your own worm composting system.

Map of the Del Rio Area

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Small Greenhouse Kit

Small Greenhouse Kit

Compact greenhouse perfect for small spaces.
Rustic Iron Garden Trellis

Rustic Iron Garden Trellis

Sturdy trellis for supporting climbing plants and vines.
Metal Arbor Trellis

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Decorative arbor trellis for climbing plants and garden entrance.
Reusable Grow Bags

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Breathable fabric grow bags that promote healthy root growth for your vegetables and fruits.
Worm Composting Kit

Worm Composting Kit

Complete kit for starting your own worm composting system.

Plants For Other States

Looking for the best plants in a different area of the United States? Click on a button below to find plants that are ideal for that state's temperatures.

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Metal Seed Storage Box

Metal Seed Storage Box

Organized storage solution for your seed collection.
Hydroponic Garden Grow Kit

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Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.
Raised Garden Bed Kit

Raised Garden Bed Kit

Easy-to-assemble raised garden bed for better soil control and drainage.
Wooden Chicken Coop

Wooden Chicken Coop

Spacious and secure home for your backyard chickens.
Shiitake Mushroom Kit

Shiitake Mushroom Kit

Grow your own delicious shiitake mushrooms at home.

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