The 3 planting zones in Portland, Oregon are USDA Hardiness Zones 8a, 8b, and 9a, as per latest USDA, 2023, data. The 3 planting zones in Portland, Oregon are listed below.

Zone 8a: Zone 8a has a minimum temperature range of 10°F to 15°F (-12.2°C to -9.4°C). Found in Portland’s higher elevations.
Zone 8b: Zone 8b has a minimum temperature range of 15°F to 20°F (-9.4°C to -6.7°C). Covering areas as Forest Park and Alberta Arts District.
Zone 9a: Zone 9a has a minimum temperature range of 20°F to 25°F (-6.7°C to -3.9°C). Thriving in Downtown and East Portland.

You can pinpoint your Portland, Oregon, USDA zone using our three tools given below, Zipcode to planting zone tool, interactive map or by using planting zone table.

Portland Planting Zones by ZipCode

Search your Portland USDA Planting zone by Zipcode, by entering your 5 digit zipcode in the search box below.

Portland planting zones Map

Select or type your Portland location in the search box below, to know its USDA Growing Zone.

Portland Planting Zones Map

City Name

Portland Area Planting Zone

USDA Planting Zone

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USDA Planting zones help determine which plants are most likely to thrive in a location. This zone is based on the average annual minimum winter temperature. DATA SOURCE: USDA

Planting Zones

Portland planting zones Table

Following table consists of Portland location in column A and their corresponding USDA Growing Zone in column B.

Portland Location	Planting Zone
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What are the planting zones in Portland, Oregon?

The 3 planting zones in Portland, Oregon are USDA Hardiness Zones 8a, 8b, and 9a. These zones help gardeners determine which plants will thrive in specific areas based on minimum winter temperatures.

Zone 8a

Zone 8a has a minimum temperature range of 10°F to 15°F (-12.2°C to -9.4°C). Zone 8a appears in limited areas of Portland and is typically found in higher elevation or more exposed locations.

Zone 8a is ideal for cold-hardy plants like Witch Hazel (Hamamelis virginiana) and Forsythia (Forsythia spp.), which tolerate occasional freezing temperatures.

Zone 8b

Zone 8b has a minimum temperature range of 15°F to 20°F (-9.4°C to -6.7°C). Zone 8b areas in Portland include Forest Park, Washington Park, Mt. Tabor, Southwest Hills, Alberta Arts District, and St. Johns.

Zone 8b supports conifers like Douglas Fir (Pseudotsuga menziesii) and Western Red Cedar (Thuja plicata), flowering shrubs such as Rhododendron (Rhododendron spp.) and Hydrangea (Hydrangea macrophylla), and fruit trees including Apple (Malus domestica) and Pear (Pyrus spp.).

Zone 9a

Zone 9a has a minimum temperature range of 20°F to 25°F (-6.7°C to -3.9°C). Zone 9a areas in Portland include the Pearl District, Downtown, Hawthorne District, Rose Quarter, Portland State University, and most of East Portland.

Zone 9a accommodates heat-loving vegetables like Tomato (Solanum lycopersicum) and Pepper (Capsicum spp.), drought-resistant ornamentals such as Lavender (Lavandula spp.) and Salvia (Salvia spp.), and Mediterranean plants like Agave (Agave spp.) and Yucca (Yucca spp.).