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Pacific Northwest Maritime & Cascades
States Covered: Oregon, Washington • Typical Climate: Zones 6b to 9a
Regional Ecological Context
Features a Mediterranean-influenced maritime climate with cool, wet winters and extended dry summer droughts, shifting rapidly across the Cascade rain shadow into arid shrub-steppe.
Primary Watersheds: Columbia River Basin, Puget Sound, Willamette River
EPA Ecoregion Classifications
- Willamette Valley (Level III 3)
- Puget Lowland (Level III 2)
- Cascades (Level III 4)
- Coast Range (Level III 1)
- Columbia Plateau (Level III 10)
Important: A nursery's physical address indicates facility location, but ethical suppliers explicitly declare their maternal seed collection zones.
Regional Technical Guide
Pacific Northwest Maritime Planting: Sourcing Riparian & Rain Garden Natives West of the Cascades
Selecting and installing native woody stock and emergent perennials for streambank bio-engineering, salmon habitat conservation, and rain gardens in western Washington and Oregon.
Read Full Planting & Sourcing Guide →Verified Nurseries in this Region (10)
Verified Active Specialist
Zone 8b
Bosky Dell Natives
Seed Provenance & Eco-Type Policy
Supplier-verified policy: Over 300 species of native plants indigenous to the Pacific Northwest. Propagated from seeds and cuttings collected ethically in Oregon and Washington. Pesticide-free growing methods.
✓ Verified via Native Plant Society of Oregon (NPSO) & Metro Nature in Neighborhoods
Verified Active Specialist
Zone 6b
WinterCreek Nursery
Seed Provenance & Eco-Type Policy
Supplier-verified policy: Specializes exclusively in plants of the High Desert and Great Basin regions. Over 200 species propagated from wild seed collected by owners and crew in Central Oregon.
✓ Verified via Native Plant Society of Oregon (NPSO) & High Desert Horticultural Society
Verified Active Specialist
Zone 8b
Sevenoaks Native Nursery
Seed Provenance & Eco-Type Policy
Supplier-verified policy: Wholesale propagation nursery producing native bare root and containerized woody plants and wetland plugs with explicit ecoregion and seed zone tracking.
✓ Verified via Oregon Nursery Association & Oregon Dept of Agriculture Licensed Nursery
Verified Active Specialist
Zone 8b
Echo Valley Natives
Seed Provenance & Eco-Type Policy
Supplier-reported: Propagates Pacific Northwest native plants for home landscapes, wetland mitigation, and wildlife habitat corridors.
✓ Verified via Native Plant Society of Oregon
Verified Active Specialist
Zone 7a
Humble Roots Farm & Nursery
Seed Provenance & Eco-Type Policy
Supplier-verified policy: Specializes in plants native to the Columbia River Gorge and surrounding transition zones. Propagated organically from locally collected seeds and cuttings.
✓ Verified via Native Plant Society of Oregon & East Multnomah Soil and Water Conservation District
Verified Active Specialist
Zone 8a
Fourth Corner Nurseries
Seed Provenance & Eco-Type Policy
Supplier-verified policy: Over 30 years propagating Pacific Northwest native bare-root trees, shrubs, and emergent wetland plants from documented regional seed zones.
✓ Verified via Washington Native Plant Society & Washington State Nursery and Landscape Association
Verified Active Specialist
Zone 8b
Woodbrook Native Plant Nursery
Seed Provenance & Eco-Type Policy
Supplier-reported: Propagates Pacific Northwest native plants adapted to west of the Cascades climates. Zero chemical pesticide policy on retail stock.
✓ Verified via Washington Native Plant Society (WNPS) South Sound Chapter
Verified Active Specialist
Zone 8a
Tadpole Haven Native Plants
Seed Provenance & Eco-Type Policy
Supplier-verified policy: Specializes in native plants of lowland western Washington. Grown without systemic chemical insecticides.
✓ Verified via Washington Native Plant Society & King County Master Gardener Partner
Verified Active Specialist
Zone 6a
Derby Canyon Natives
Seed Provenance & Eco-Type Policy
Supplier-verified policy: 100% native plants of Central and Eastern Washington. Propagated exclusively from seed and cutting collections from wild populations east of the Cascade crest.
✓ Verified via Washington Native Plant Society & Chelan County Natural Resource Dept
Verified Active Specialist
Zone 8a
Storm Lake Growers
Seed Provenance & Eco-Type Policy
Supplier-reported: Commercial production of Pacific Northwest native trees, shrubs, and wetland emergent species for mitigation and restoration.
✓ Verified via Snohomish County Conservation District & WNPS