11 planting zones in Oregon with Map

There are 11 Planting zones in Oregon ranging from 5a to 10a according to the USDA’s latest official data.

Zone 5a, the coldest, is limited to high-elevation areas in the northeast, while zones 5b and 6a covers eastern Oregon’s high desert and mountainous regions.

Zones 6b and 7a dominate central Oregon, and 7b appearing in the Columbia River Gorge. The Willamette Valley largely falls within zone 8, while the coast ranges from zone 8b in the north to 9b in the south.

Zone 10a, the warmest, covers a narrow strip along the southern coast, showing Oregon’s climatic diversity within a relatively small geographic area.

You can find your Oregon planting zone by using our ZIP code tool or the Oregon city planting zone map. Both tools, provided below in the post, will help you determine your exact USDA growing zone.

Search Oregon Planting Zones by ZipCode

Planting Zones Oregon Map

Select your Oregon city in the selection box below. You can change map view by selecting layers from top right corner button in mapview.

What are the 11 planting zones in Oregon?

1. Zone 5a

This zone, represented by the dark purple color on the map, is the coldest in Oregon with average annual minimum temperatures ranging from -20°F to -15°F (-28.9°C to -26.1°C). The high-elevation areas in the northeastern part of the state fall into this zone category.

2. Zone 5b

Zone 5b, shown in a deep blue color on our map, covers a small area in the eastern part of Oregon. With temperatures ranging from -15°F to -10°F (-26.1°C to -23.3°C), this zone have the city of Seneca, located in the Blue Mountains region.

3. Zone 6a

Shown in a slightly lighter blue color on the map above, Zone 6a experiences average annual minimum temperatures between -10°F and -5°F (-23.3°C to -20.6°C). This zone covers large portions of central and eastern Oregon, and includes cities such as Burns, Chemult, and Joseph. It covers areas like Christmas Valley, Fort Rock, and parts of the Fremont-Winema National Forest.

4. Zone 6b

Zone 6b, shown in a medium blue shade on our map, has a temperature range of -5°F to 0°F (-20.6°C to -17.8°C). This zone covers a large section of central and eastern Oregon, including popular destinations like Bend, Crater Lake, and La Grande. Other notable cities in this zone are Baker City, Prineville, and parts of Klamath Falls.

5. Zone 7a

Represented by teal color on the map, Zone 7a average annual minimum temperatures ranges from 0°F to 5°F (-17.8°C to -15°C). This zone includes areas along the Columbia River Gorge and parts of central Oregon. Some cities in this zone are Culver, Pendleton, and Helix.

6. Zone 7b

Zone 7b, shown in a green color on our map above, has a temperature range of 5°F to 10°F (-15°C to -12.2°C). This zone also covers parts of the Columbia River Gorge and scattered areas in central Oregon. Some of the cities in this zone are Boardman, Irrigon, and Mosier.

7. Zone 8a

The brighter green areas on our map above, Zone 8a have an average annual minimum temperatures between 10°F and 15°F (-12.2°C to -9.4°C). This zone includes parts of the Willamette Valley and southern Oregon. Some notable cities are Ashland, Eagle Point, and Vernonia.

8. Zone 8b

Zone 8b, shown in a lighter-green color, it covers a significant areas of western Oregon, including much of the Willamette Valley. With temperatures ranging from 15°F to 20°F (-9.4°C to -6.7°C), this zone have major cities like Astoria, Portland, Eugene, Salem, and Corvallis.

9. Zone 9a

Represented by a yellowish green color on the map above, Zone 9a has average annual minimum temperatures from 20°F to 25°F (-6.7°C to -3.9°C). This zone mostly covers the coastal regions of Oregon, and includes cities like Garibaldi, Lincoln City, and Florence.

10. Zone 9b

Zone 9b, shown in a yellow color on our map, is found along the southern Oregon coast. With temperatures ranging from 25°F to 30°F (-3.9°C to -1.1°C), this zone have coastal cities such as Bandon, Gold Beach, and Newport.

11. Zone 10a

The warmest zone in Oregon, 10a, is shown by a deep and darker purple color on the map above. It experiences average annual minimum temperatures between 30°F and 35°F (-1.1°C to 1.7°C). It includes small pockets of areas along the southern Oregon coast, near Brookings and other sheltered coastal areas.

Planting Zones in Oregon with Cities

USDA hardiness zones for Oregon Cities, Towns and Counties. Data Source: USDA (2023)

Planting Zones in Oregon	Temp Range (°F)	Cities
7a	0 to 5	Adams, Adrian, Antelope, Ashwood, Athena, Condon, Culver, Dayville, Echo, Enterprise, Fossil, Government Camp, Grass Valley, Helix, Heppner, Huntington, Kent, Kimberly, Klamath Falls, Lexington, Madras, Maupin, Milton Freewater, Mitchell, Monument, Moro, Nyssa, Ontario, Oxbow, Pendleton, Sisters, Spray, Stanfield, Tygh Valley, Vale, Warm Springs, Weston
8b	15 to 20	Albany, Alsea, Alvadore, Amity, Astoria, Aumsville, Aurora, Azalea, Banks, Beaver, Beavercreek, Beaverton, Blachly, Blodgett, Boring, Brownsville, Buxton, Canby, Canyonville, Carlton, Cascadia, Cave Junction, Central Point, Cheshire, Clatskanie, Colton, Columbia City, Corbett, Cornelius, Corvallis, Cottage Grove, Crabtree, Crawfordsville, Creswell, Dallas, Days Creek, Dayton, Deer Island, Donald, Dorena, Drain, Dundee, Eagle Creek, Elmira, Eugene, Fall Creek, Falls City, Forest Grove, Foster, Gales Creek, Gaston, Gates, Gervais, Glendale, Glide, Gold Hill, Grand Ronde, Grants Pass, Gresham, Halsey, Happy Valley, Harrisburg, Hebo, Hillsboro, Hubbard, Idleyld Park, Independence, Jefferson, Junction City, Keizer, Kerby, Lafayette, Lebanon, Lorane, Lyons, Manning, Marcola, Mcminnville, Medford, Mehama, Merlin, Mill City, Molalla, Monmouth, Monroe, Mount Angel, Mulino, Myrtle Creek, Nehalem, Newberg, North Plains, Noti, O Brien, Oakland, Oakridge, Philomath, Phoenix, Pleasant Hill, Portland, Rainier, Rickreall, Riddle, Rogue River, Roseburg, Saint Benedict, Saint Helens, Saint Paul, Salem, Sandy, Scappoose, Scio, Scotts Mills, Seaside, Selma, Shedd, Sheridan, Sherwood, Silverton, Springfield, Stayton, Sublimity, Sutherlin, Sweet Home, Tangent, Tiller, Timber, Turner, Veneta, Vida, Walterville, Walton, Warren, Westfir, White City, Wilbur, Wilderville, Willamina, Williams, Willamette Valley, Wilsonville, Winchester, Wolf Creek, Woodburn, Yamhill, Yoncalla
9a	20 to 25	Agness, Allegany, Arch Cape, Bay City, Beaverton, Broadbent, Camas Valley, Cannon Beach, Clackamas, Cloverdale, Coos Bay, Coquille, Deadwood, Depoe Bay, Dexter, Eddyville, Elkton, Fairview, Florence, Gardiner, Garibaldi, Gladstone, Gresham, Hammond, Lake Oswego, Lakeside, Langlois, Lincoln City, Logsden, Lowell, Manzanita, Mapleton, Marylhurst, Myrtle Point, Neotsu, Neskowin, Netarts, North Bend, Oceanside, Oregon City, Otis, Otter Rock, Portland, Powers, Reedsport, Rockaway Beach, Roseburg, Scottsburg, Seal Rock, Siletz, Swisshome, Tenmile, Tidewater, Tillamook, Toledo, Tolovana Park, Troutdale, Tualatin, Umpqua, Waldport, Warrenton, West Linn, Westlake, Wheeler, Winston, Yachats
8a	10 to 15	Ashland, Brightwood, Butte Falls, Cascade Locks, Eagle Point, Estacada, Jacksonville, Prospect, Rufus, Shady Cove, Talent, Trail, Vernonia, Welches
7b	5 to 10	Arlington, Blue River, Boardman, Detroit, Dufur, Hermiston, Hood River, Idanha, Ione, Irrigon, Mikkalo, Mosier, Mount Hood Parkdale, Rhododendron, The Dalles, Umatilla, Wasco
6b	-5 to 0	Adel, Arock, Baker City, Bates, Bend, Bly, Bonanza, Bridgeport, Brogan, Camp Sherman, Canyon City, Cove, Crater Lake, Crescent, Dairy, Durkee, Elgin, Fields, Fort Klamath, Frenchglen, Halfway, Harper, Imbler, Imnaha, Jamieson, John Day, Jordan Valley, Keno, Klamath Falls, La Grande, La Pine, Lakeview, Long Creek, Malin, Meacham, Merrill, Midland, Mount Vernon, New Pine Creek, North Powder, Paisley, Pilot Rock, Plush, Powell Butte, Prairie City, Princeton, Prineville, Redmond, Richland, Shaniko, Summer Lake, Summerville, Sumpter, Terrebonne, Ukiah, Union, Wallowa
9b	25 to 30	Bandon, Brookings, Gleneden Beach, Gold Beach, Newport, Ophir, Pacific City, Port Orford, Sixes, South Beach, Wedderburn
6a	-10 to -5	Beatty, Bend, Brothers, Burns, Chemult, Chiloquin, Christmas Valley, Crane, Diamond, Drewsey, Fort Rock, Gilchrist, Haines, Hereford, Hines, Ironside, Joseph, Juntura, Lostine, Paulina, Post, Riley, Riverside, Silver Lake, Sprague River, Unity, Westfall
5b	-15 to -10	Seneca

How do hardiness zones impact the growing season?

Hardiness zones impact the growing season by determining the range of temperatures a region experiences, which directly influences plant survival, growth, and blooming periods. In Oregon, zones range from 5a to 10a, with colder zones (5a to 6b) experiencing shorter growing seasons due to lower minimum temperatures, while warmer zones (7a to 10a) enjoy longer growing seasons with milder winters.