What Growing Zone Is Roche Harbor?

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

Latest WA growing zone map

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

Seed Starting Trays

Perfect for starting seeds indoors before transplanting to your garden.

Reusable Grow Bags

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

Self Watering Plant Pots

Innovative pots that maintain optimal moisture levels.

Raised Garden Planter

Elevated planter for easy access and better drainage.

Cluck Around Sign

Whimsical sign for your chicken coop area.

Latest WA 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 Roche Harbor is in growing zone 9a this means that plants there can survive temperatures as low as 20 to 25 degrees Fahrenheit. Plants for Roche Harbor'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 Roche Harbor 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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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 Roche Harbor, WA.

The USDA hardiness zone is 9a for Roche Harbor. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.

Roche Harbor's Growing Zone Details

USDA Growing Zone: 9a

Zip Codes: 98250

Longitude: -123.1347

Latitude: 48.6079

Lowest Avg Temperatures (F): 20 to 25

Self Watering Plant Pots

Innovative pots that maintain optimal moisture levels.

Metal Arbor Trellis

Decorative arbor trellis for climbing plants and garden entrance.

Seed Starting Trays

Perfect for starting seeds indoors before transplanting to your garden.

Hydroponic Garden Grow Kit

Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.

Fiskars Garden Harvest Basket

Sturdy basket for collecting and carrying your garden harvest.

Map of the Roche Harbor Area

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Hoeing Ain't Easy Garden Sign

Fun and decorative garden sign to add personality to your space.

Brass Watering Can

Elegant brass watering can with classic design and durability.

Metal Seed Storage Box

Organized storage solution for your seed collection.

Steel Hori Hori Weeding Knife

Versatile Japanese-style gardening knife for weeding and planting.

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.

Metal Arbor Trellis

Decorative arbor trellis for climbing plants and garden entrance.

Fiskars Garden Harvest Basket

Sturdy basket for collecting and carrying your garden harvest.

Reusable Grow Bags

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

Rustic Iron Garden Trellis

Sturdy trellis for supporting climbing plants and vines.

Deluxe Plastic Watering Can

High-capacity watering can with comfortable grip and precise spout.

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