Diverse Gardens for Oregon's Many Climates
Oregon spans USDA zones 4b in the Cascades to 9b on the southern coast. From Portland's lush woodland gardens to high desert rock gardens east of the Cascades, discover styles for every Oregon landscape.
Oregon climate overview
Western Oregon has a mild, maritime climate with wet winters and dry summers. Portland averages 43 inches of rain, mostly November through March. Eastern Oregon is high desert with hot summers, cold winters, and 10-15 inches of annual precipitation. The Cascades divide these two worlds.
Best garden styles for Oregon
Popular plants in Oregon
Recommended species
- Oregon Grape (Mahonia aquifolium)
- Red Flowering Currant (Ribes sanguineum)
- Douglas Fir (Pseudotsuga menziesii)
- Rhododendron (Rhododendron)
- Japanese Maple (Acer palmatum)
- Hellebore (Helleborus)
- Sword Fern (Polystichum munitum)
- Camas (Camassia quamash)
Gardening challenges in Oregon
Extended winter rain and overcast skies promoting slugs, moss, and root rot
Summer drought in western Oregon from late June through September
Volcanic soils in the Cascades with poor nutrient retention
Invasive species like English ivy, Himalayan blackberry, and Scotch broom dominating disturbed land
Oregon gardening tips
- Design rain-season drainage with French drains and raised beds to keep roots from sitting in winter water
- Select PNW natives like Oregon grape, red flowering currant, and Douglas fir for low-maintenance beauty
- Use slug-resistant plants like ferns, ornamental grasses, and hellebores in wet western Oregon gardens
- Remove invasive English ivy and blackberry before planting — they will outcompete anything you install
- Leverage Oregon's long, cool springs for spectacular rhododendron, azalea, and Japanese maple displays
Frequently Asked Questions
Q1 What are the best plants for Oregon gardens?
Oregon grape (the state flower), red flowering currant, rhododendrons, and Japanese maples are quintessential western Oregon plants. For eastern Oregon, choose drought-tolerant species like sagebrush, bitterbrush, and penstemon. Statewide, Douglas fir and sword fern are native anchors.
Q2 When should I plant in Oregon?
Fall (October-November) is the best time to plant in western Oregon, as winter rains establish roots naturally. Eastern Oregon gardeners should plant in spring (April-May) after frost danger passes. In the Willamette Valley, the growing season extends roughly from March through November.
Q3 How do I deal with slugs in Oregon?
Slugs thrive in Oregon's wet climate. Use iron phosphate bait (safe for pets and wildlife), copper barriers around raised beds, and beer traps. Choose slug-resistant plants like ferns, ornamental grasses, and hellebores. Water in the morning so soil surface dries by evening.