What To Plant For Washington Landscaping: Trees And Shrubs

Washington is a geographically diverse state with a wide range of microclimates and soils. Choosing the right trees and shrubs for your landscape depends on where you live in the state, your goals (privacy, shade, pollinator habitat, low maintenance, fruit production), and site conditions such as sun exposure, wind, salt spray, and soil type. This guide provides practical, region-specific recommendations and planting and care instructions so you can build a resilient, attractive landscape for Washington.

Washington climate zones and planting context

Washington ranges from wet maritime climate in the west to semi-arid and cold continental conditions in the east. Before selecting species, determine these key site factors:

Hardiness zone (USDA zones in Washington commonly range from 4 to 9).
Rainfall and irrigation availability (west: 30-120+ inches/year; east: 6-20 inches/year).
Summer heat and winter cold extremes.
Soil texture and drainage (heavy clay, sandy loam, volcanic ash, glacial till).
Salt exposure on coastal and nearshore properties.
Deer and other wildlife pressure.

Understanding these variables will let you choose trees and shrubs that thrive with minimal inputs.

Native and region-appropriate trees to consider

Choosing native or well-adapted trees reduces maintenance, supports local wildlife, and increases resilience to pests and extreme weather.

Western Washington (Puget Sound, Olympic Coast)

Douglas-fir (Pseudotsuga menziesii) — Large evergreen, excellent for windbreaks and long-term privacy. Requires space; avoid close to structures and septic fields.
Western red cedar (Thuja plicata) — Dense evergreen for screens and wildlife habitat. Prefers moist, well-drained soils.
Bigleaf maple (Acer macrophyllum) — Deciduous, fast-growing shade tree; tolerates wet soils and provides good fall color.
Vine maple (Acer circinatum) — Native understory tree/small tree; great in shady yards and naturalized slopes.
Pacific madrone (Arbutus menziesii) — Evergreen with distinctive bark and summer berries; prefers well-drained sites and some sun exposure.
Sitka spruce (Picea sitchensis) — Coastal sites, tolerates salt spray, fast-growing; good for coastal wind protection.

Eastern Washington (Inland, drier, colder)

Ponderosa pine (Pinus ponderosa) — Drought tolerant, good for larger properties and windbreak plantings.
Black cottonwood (Populus trichocarpa) — Fast-growing shade tree for moist riparian areas; avoid planting close to foundations due to aggressive roots.
Rocky Mountain juniper (Juniperus scopulorum) — Drought- and cold-tolerant evergreen suitable for screens and foundation plantings.
Serviceberry (Amelanchier alnifolia) — Small native tree with spring flowers and edible berries; good for front yards and wildlife.

Fruit and small ornamental trees (statewide options)

Apple and pear — Many cultivars are well adapted across Washington, with eastern areas favoring varieties needing more heat.
Cherry (sweet and tart) — Cherries prefer well-drained soils; tart cherries are generally more cold-hardy.
Japanese and flowering cherries (Prunus spp.) — Excellent spring interest in urban gardens; select disease-resistant cultivars.

Shrubs that perform well in Washington

Shrubs can provide seasonal color, year-round structure, and food for pollinators and birds. Match species to moisture and light.

Western Washington shrubs (moist, acidic soils)

Rhododendron and azalea — Classic Pacific Northwest shrubs for shade to part-sun, requiring acidic, well-drained soils.
Oregon grape (Mahonia aquifolium) — Evergreen native with yellow winter flowers and blue berries; deer-resistant and drought-tolerant once established.
Salal (Gaultheria shallon) — Dense evergreen ground- to mid-height shrub for shade; excellent for underplanting conifers.
Red huckleberry (Vaccinium parvifolium) — Native, tasty berries, thrives in acidic soils and partial shade.

Eastern Washington shrubs (dry, full sun)

Chokecherry (Prunus virginiana) — Native, tough, good for wildlife; tolerates drier soils.
Bluebeard (Caryopteris spp.) — Drought-tolerant, late-summer flowers that attract pollinators.
Potentilla (Potentilla fruticosa) — Low-maintenance, flowering shrub for sunny borders.
Serviceberry (also works as a shrub form) — Good in borders and hedgerows, edible berries.

Evergreen shrubs for structure and privacy (statewide picks)

Yew (Taxus spp.) — Dense evergreen hedging plant, tolerates heavy pruning and shade; toxic fruit/foliage to pets and people.
Boxwood (Buxus sempervirens) — Formal hedges and topiary in milder zones; avoid in very wet soils.
Leucothoe, Pieris — Flowering evergreen shrubs for shade and acid soils.

Practical selection criteria and species details

When comparing species, consider these attributes and ask these site-specific questions:

Mature size and growth rate: Will the plant fit the space in 10, 20, and 50 years?
Root habit: Will roots interfere with sidewalks, septic systems, or foundations?
Soil pH preference: Do you need to amend soil for acid-loving species like rhododendron or blueberry?
Water needs: Can the plant survive dry summers with supplemental irrigation, or is it suitable for low-water landscaping?
Wildlife and pollinators: Do you want fruiting trees to feed birds, or deer-resistant plantings?
Salt tolerance: Important for coastal and roadside plantings.

Provide species tags when buying nursery stock: height and spread, sun/shade, water needs, soil preference, and deer resistance.

Planting and early-care guidelines (concrete steps)

Good planting technique matters more than fertilizer or mulch. Follow these steps for the highest chance of success:

Dig a hole 2 to 3 times wider than the root ball but only as deep as the root flare. Trees planted too deeply develop girdling roots.
Locate and expose the root flare so the topmost major root is at or slightly above finished grade.
Loosen the surrounding soil to improve drainage and root expansion. Do not excessively amend the backfill with organic matter for trees; place native soil back and use compost sparingly unless you have very poor soil.
Backfill and tamp lightly to eliminate large air pockets. Water deeply to settle the soil.
Apply a 2 to 3 inch layer of mulch, keeping mulch pulled back 4 to 6 inches from the trunk to prevent rot. Avoid “volcano” mulching.
Water slowly and deeply. For the first year, aim for weekly deep soakings unless you have heavy rain. Use drip irrigation or soaker hoses to encourage deep root growth.
Stake only if the tree cannot support itself for one growing season. Remove stakes after 1 year to allow trunk strengthening.
Prune minimally at planting except to remove damaged branches. Follow a formative pruning plan in subsequent years.

Maintenance: irrigation, pruning, pests, and fertilizing

Irrigation: In western Washington reduce supplemental water in winter and provide regular deep watering in summer only as needed. In eastern Washington expect to irrigate regularly in summer for most non-native or fruiting species.
Pruning: Prune deciduous trees in late winter to shape and remove crossing branches. Prune flowering shrubs after bloom to preserve flower buds for the next season.
Fertilizing: Most established trees and shrubs do not need routine fertilization if soil is reasonably fertile. Test soil if growth is poor; apply balanced fertilizer in early spring if needed.
Pests and disease: Monitor for aphids, scale, leaf spot, and root rot. Plant disease-resistant cultivars when possible and maintain good air circulation to reduce fungal issues.
Deer and rodent protection: Use tree guards for young trunks and choose deer-resistant species if browsing is a problem. Fencing and repellents are options for high-pressure areas.

Design strategies for Washington yards

Layered planting: Use tall canopy trees, smaller understory trees, mid-height shrubs, and groundcovers for a natural, low-maintenance structure.
Native buffers: Create native shrub hedges along property edges for wildlife habitat, low maintenance, and seasonal interest.
Windbreaks: For exposed sites in eastern and coastal areas, use multi-row windbreaks mixing evergreens and deciduous trees to reduce wind speed and snow drift.
Rain gardens and swales: Capture and infiltrate roof and driveway runoff in the west with native moisture-loving shrubs like red osier dogwood, willows, and sedges.

Quick regional planting recommendations (takeaway list)

Western Washington (moist, mild):
Evergreen screens: Western red cedar, yew.
Shade trees: Bigleaf maple, vine maple.
Shrubs: Rhododendron, Oregon grape, salal, red huckleberry.
Eastern Washington (dry, continental):
Windbreaks and tall trees: Ponderosa pine, Rocky Mountain juniper, hybrid poplars for temporary windbreaks.
Drought-tolerant shrubs: Potentilla, cotoneaster, chokecherry.
Fruit: Apple, tart cherry, hardy pear varieties.
Coastal salt-exposed sites:
Salt-tolerant trees: Sitka spruce, shore pine.
Shrubs: Sea buckthorn can be used with caution where not invasive; consider native salt-tolerant species and local recommendations.

Common pitfalls and plants to avoid or use cautiously

Planting too close to structures, sidewalks, or septic fields without considering mature root spread and canopy width.
Choosing high-water, shallow-rooted trees in eastern Washington without irrigation.
Using invasive species or cultivars that escape into natural areas. Check with local extension recommendations for invasiveness.
Overmulching or planting too deep, which leads to root rot and girdling roots.
Ignoring salt exposure on coastlines; select tolerant species or plant buffers.

Final checklist before you plant

Identify your exact microclimate, soil type, and sun exposure.
Decide on goals: privacy, shade, color, wildlife, edibles, or low maintenance.
Choose species rated for your hardiness zone and site conditions.
Measure for mature size and maintain appropriate planting distances.
Use correct planting technique and irrigation plan for the first two years.
Plan a maintenance schedule: pruning windows, mulch refresh, pest monitoring.

Planting the right trees and shrubs for your region of Washington pays off in lower maintenance, healthier plants, and greater enjoyment of your landscape. Focus on matching plants to site conditions, using native species where appropriate, and following sound planting practices to establish a landscape that will thrive for decades.