Best plants for Washington
These species reliably perform in Washington's climate — a blend of regionally-adapted ornamentals and native plants that don't need babying once established. Start with this short list, then expand once you know your specific microclimate (slope, shade, drainage).
- Apple
- Rhododendron
- Hydrangea
- Lavender
- Hops
- Blueberry
- Hellebore
- Hosta
- Cherry
- Japanese maple
Native plants of Washington
Natives evolved alongside Washington's soils, pollinators, and weather patterns, so they need almost no supplemental water or fertilizer once established. Mixing 30-50% natives into a garden dramatically improves its drought resilience and its value to local birds and pollinators.
- Coast rhododendron (Rhododendron macrophyllum, state flower)
- Western hemlock (state tree)
- Salal
- Sword fern
- Camas lily
For zone-specific timing and a fuller plant palette, see the gardening guide for USDA zone 4.
Your plant advisor can filter the full database to species suited to your Washington zone.
Frost dates and timing in Washington
Average last spring frost: mid-March (Seattle) to early June (Cascades). Average first fall frost: early September (Cascades) to mid-November (Seattle). Growing season runs about 150-300 days. As always, average dates are starting points — set seedlings out a week or two later than the average last-frost for high-value crops like tomatoes and peppers, and have row cover or frost blankets ready for an unseasonable late freeze.
Use the fall planting schedule by zone to plan your second crop, and the vegetable garden planting schedule for week-by-week spring timing.
Soils and amendment in Washington
Glacial-outwash sandy loams in the Puget Sound lowlands, rich volcanic Columbia Basin loess east of the Cascades, and thin acidic soils at elevation.
Challenges specific to Washington
Slug pressure in the wet Puget lowlands, eastside summer drought and wildfire smoke, persistent winter cloud cover slowing tomatoes, and clay soils that stay saturated.
For drought-prone parts of Washington, see the drought-tolerant garden design guide. If your yard sits low and stays wet, the drainage fix without regrading guide covers raised beds, French drains, and bog-tolerant planting palettes.
Design your Washington garden in 3D
Sketch your beds, place plants to scale, and see the whole design in 3D before you buy a single one-gallon pot. The free designer filters plants by USDA zone, so anything you place is already suited to the climate in Washington.
Design your Washington garden in 3D
Free, no signup required. Filter plants by USDA zone 4a-9a and see your design rendered to scale before you buy.
Open the free 3D garden designerFrequently asked about gardening in Washington
›What USDA hardiness zones is Washington in?
Washington spans USDA zones 4a-9a. Western Washington including Seattle sits in zone 8b-9a thanks to ocean moderation; the Cascades drop to zone 4a-5a at altitude; eastern Washington's Columbia Basin and Spokane run zone 6-7. Match plant cold-hardiness ratings to your local zone — pushing into warmer-rated species is a gamble against the next hard winter.
›When is the last spring frost in Washington?
Average last spring frost in Washington is around mid-March (Seattle) to early June (Cascades), and the first fall frost typically arrives early September (Cascades) to mid-November (Seattle). That gives a typical growing season of 150-300 days. Average dates are starting points — set seedlings out a week or two later than the average for safety.
›What plants grow well in Washington?
Reliable choices for Washington include Apple, Rhododendron, Hydrangea, Lavender. These species are matched to Washington's climate and soils — a blend of regionally-adapted ornamentals and natives that perform without babying once established.
›What plants are native to Washington?
Native plants in Washington include Coast rhododendron, Western hemlock, Salal. Natives evolved alongside local soils, pollinators, and weather, so they typically need no supplemental water or fertilizer once established — and they support local birds and pollinators in ways non-native ornamentals can't.
›What's distinctive about gardening in Washington?
Washington grows ~60% of all US apples — the rain-shadowed Columbia Basin combines hot dry days with cool nights and irrigation from the Columbia for unmatched fruit conditions. Slug pressure in the wet Puget lowlands, eastside summer drought and wildfire smoke, persistent winter cloud cover slowing tomatoes, and clay soils that stay saturated.