What Growing Zone Is Waterloo?

Our records indicate the United States Department of Agriculture has given Waterloo a growing zone designation of 8b. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Waterloo's climate based on the average extreme annual temperature. .Our data is based on the latest 2023 USDA maps, which used Waterloo's weather data from 1991 - 2020 in their analysis.

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

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Latest OR 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 Waterloo is in growing zone 8b this means that plants there can survive temperatures as low as 15 to 20 degrees Fahrenheit. Plants for Waterloo'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 Waterloo 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 2023

Half 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!

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Waterloo's Growing Zone Details

USDA Growing Zone: 8b

Zip Codes: 97355

Longitude: -122.8242

Latitude: 44.4947

Lowest Avg Temperatures (F): 15 to 20

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Map of the Waterloo Area

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Metal Seed Storage Box

Organized storage solution for your seed collection.

Cluck Around Sign

Whimsical sign for your chicken coop area.

Brass Decorative Faucet Handle

Elegant brass handle to enhance your garden faucet.

Brass Watering Can

Elegant brass watering can with classic design and durability.

Shiitake Mushroom Kit

Grow your own delicious shiitake mushrooms at home.

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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