Native Plants for Moist Soils
There are bunches Pacific Northwest plants for moist sites.
Remember: plant habitats don't sit in only one category, but exist on a gradient.
This article highlights plants that prefer moist soils, but each description states the range in moisture they tolerate. It is part of our Species Selection Guide where we share select collections of plants based on their ecosystem services, site condition needs, or material type.
Which Plants Prefer Moist Soils?
Sound Native Plants specializes in the Salish Lowland and Willamette Valley ecoregions, which are largely covered by temperate rainforest. Many of our native plants require moist soils, it is by far our largest collection. Mulch and natural organic matter helps control soil moisture.
These species lists are not comprehensive of the incredible native diversity of our Pacific Northwest region. For fuller lists of SNP favorites, see our Species Descriptions. For more complete databases, we recommend visiting our friends at the University of Washington Burke Herbarium or Washington Native Plant Society.
What Characterizes Moist Soils?
Moist means that the earth is regularly damp, but not total saturation.
However, moist comes in many degrees and variations, from damp to soaking and from steady moisture to fluctuating wet and dry. One person’s moist may be very different than another’s. Most plant descriptions include the species' prefered range. Moisture gradients can also vary by sun exposure. Be mindful of a plant's specific sun and moisture gradients when planning your project.
Some of these plants prefer moist, but well-draining soils. This refers to soils that do not retain much water. They dry out occasionally, especially in the summer months. Well-draining, moist soils do not stay dry for long, perhaps a few hours to a couple days maximum. Plants that require well-draining soils are noted in the Comments section of applicable descriptions. They are frequently plants listed as Moist to dry.
As plant habitats follow a continuum, there is overlap between this list, dry, and wet lists. To learn more about these classifications, visit our Species Descriptions: Terms page.
Unless otherwise stated, all plant information comes from our Species Descriptions, where we invite you to read about more plants native to our Pacific Northwest.
Native Plants for Moist Soils
Plant lists are organized by layer. It is important to consider all layers in any project.
Tree Layer
Abies grandis
Exposure: Full sun to shade
Soil moisture: Moist to dry
Salinity tolerance: None
Fire tolerance: High
Transplanting success: High
Growth rate: Moderate
Form: Coniferous evergreen to 260 feet; deep, extensive root system
Comments: Requires well-draining soils
You can deep dive into grand fir in our Plant of the Month Archive!
Acer macrophyllum
Exposure: Full sun to shade
Soil moisture: Wet to dry
Salinity tolerance: None
Fire tolerance: High
Transplanting success: High
Growth rate: Rapid
Form: Deciduous large tree to 110 feet; deep, wide spreading roots
Comments: Super versatile on both the moisture and sun exposure gradients
Alnus rubra
Exposure: Full sun to light shade
Soil moisture: Wet to moist
Salinity tolerance: None
Fire tolerance: High
Transplanting success: Medium
Growth rate: Rapid
Form: Deciduous tree to 90 feet; branching, fibrous, moderately deep root system with taproot
Comments: Fairly versatile along both the moisture and sun exposure gradients. Great for riparian areas
Pacific flowering dogwood
Cornus nuttallii
Exposure: Part sun to part shade
Soil moisture: Moist to dry
Salinity tolerance: Medium
Fire tolerance: None
Transplanting success: Unknown
Growth rate: Moderate
Form: Multi-stemmed deciduous tree to 60 feet, often much shorter
Comments: Requires moist, but well-draining soils. Assume losses to disease. Plant at an edge with stem in shade
Data from the USDA Plant Characteristics Database and the Lady Bird Johnson Wildflower Center
Frangula purshiana
Exposure: Full sun to shade
Soil moisture: Wet to dry
Salinity tolerance: None
Fire tolerance: Medium
Transplanting success: High
Growth rate: Rapid
Form: Deciduous tree to 30 feet; fibrous, moderately deep root system with taproot
Comments: Very versatile along the moisture spectrum. Great for riparian areas
Picea sitchensis
Exposure: Full sun to partial shade
Soil moisture: Moderately wet to moist
Salinity tolerance: None
Fire tolerance: None
Transplanting success: High
Growth rate: Moderate to rapid
Form: Coniferous evergreen tree shrub to 200 feet; shallow, branching, shallow roots
Pinus contorta v. contorta
Exposure: Full sun to partial shade
Soil moisture: Wet to dry
Salinity tolerance: None
Fire tolerance: None
Transplanting success: High
Growth rate: Rapid
Form: Coniferous evergreen tree to 60 feet; tap root
Comments: Very versatile along the moisture spectrum
Populus trichocarpa
Exposure: Full sun to partial shade
Soil moisture: Saturated to moist
Salinity tolerance: None
Fire tolerance: None
Transplanting success: High (both container-grown & live stakes)
Growth rate: Rapid
Form: Deciduous tree to 160 feet; roots are fibrous and branching, shallow or deep, and extensive
Prunus emarginata
Exposure: Full sun to part sun
Soil moisture: Moist
Salinity tolerance: None
Fire tolerance: High
Transplanting success: Unknown
Growth rate: Moderate
Form: Small, deciduous tree or shrub
Comments: Requires moist, but well-draining soils. Assume losses to disease
Data from the USDA Plant Characteristics Database
Pseudotsuga menziesii v. menziesii
Exposure: Full sun to light shade
Soil moisture: Moist to dry
Salinity tolerance: Low
Fire tolerance: Low
Transplanting success: High
Growth rate: Moderate to rapid
Form: Evergreen tree to 200 or 300 feet; tap or modified taproot, shallow or deep, widespread root system
Comments: Very versatile along the moisture spectrum
Salix scouleriana
Exposure: Full sun to partial shade
Soil moisture: Moderately dry to moist
Salinity tolerance: Low
Fire tolerance: High
Transplanting success: High (both container-grown & live stakes)
Growth rate: Moderate to rapid
Form: Deciduous tree or shrub to 40 feet; fibrous, moderately deep and widespread roots
Comments: Drier sites and marine shores, roots slowly, often lower success rate than other willows, a shrub-tree that can grow <60' tall
Thuja plicata
Exposure: Partial shade to deep shade
Soil moisture: Wet to moist
Salinity tolerance: None
Fire tolerance: Low
Transplanting success: Medium
Growth rate: Moderate
Form: Coniferous evergreen tree to 200 feet with buttressed base; shallow, widely spreading root system
Comments: Tolerates seasonal flooding
Tsuga heterophylla
Exposure: Partial shade to deep shade
Soil moisture: Wet to moist
Salinity tolerance: None
Fire tolerance: Low
Transplanting success: Medium
Growth rate: Moderate
Form: Coniferous evergreen tree to 200 feet; shallow, slow-growing roots becoming wide-spread
You can deep dive into Western hemlock in our Plant of the Month Archive!
Shrub Layer
Acer circinatum
Exposure: Partial shade to deep shade, full sun if ample soil moisture
Soil moisture: Moist to dry
Salinity tolerance: None
Fire tolerance: Medium
Transplanting success: High
Growth rate: Moderate
Form: Deciduous small tree or large shrub to 20 ft; moderately deep root system
Comments: Slower growing, a survivor
You can deep dive into vine maple on our blog post, Vine Maples as Foliage Trees for Rubies and Bees!
Amelanchier alnifolia
Exposure: Full sun to shade
Soil moisture: Moist to dry
Salinity tolerance: Low
Fire tolerance: High
Transplanting success: Medium
Growth rate: Moderate, may be slow to establish
Form: Deciduous large shrub or small tree to 20 feet; tap root, may spread by suckers
Comments: In moist conditions, well draining soils are required
Cornus sericea
Exposure: Full sun to partial shade
Soil moisture: Saturated to moist
Salinity tolerance: None
Fire tolerance: Low
Transplanting success: High for container-grown, low or medium for live stakes
Growth rate: Rapid
Form: Deciduous large shrub or small tree, 5-20 feet depending on site conditions; fibrous, shallow root system, spreads by layering and suckers
Comments: Very versatile along the moisture spectrum
You can deep dive into red-twig dogwood in our Plant of the Month Archive!
Corylus cornuta v. californica
Exposure: Sun to deep shade
Soil moisture: Moist and well-drained to dry
Salinity tolerance: None
Fire tolerance: High
Transplanting success: Medium-high
Growth rate: Moderate
Form: Deciduous shrub 4-12 feet; branching, roots, suckers occasionally
Comments: Slower growing, a survivor. Requires moist, but well-draining soils
Gaultheria shallon
Exposure: Partial shade to deep shade
Soil moisture: Moist to dry
Salinity tolerance: None
Fire tolerance: High
Transplanting success: Medium to high if shaded, low if not
Growth rate: Slow until established
Form: Evergreen shrub 2-5 feet, sometimes more; very shallow and fibrous root system, spreads vigorously by underground stems once well established
Orange Honeysuckle
Lonicera ciliosa
Exposure: Full sun to shade
Soil moisture: Moist
Salinity tolerance: Unknown
Fire tolerance: Unknown
Transplanting success: Unknown
Growth rate: Unknown
Form: Deciduous vine to 20 feet
Comments: Assume transplanting losses; propagated by seeds or cuttings; super cool blue buds in the wintertime
Data from the Lady Bird Johnson Wildflower Center
Lonicera involucrata
Exposure: Full sun to partial shade
Soil moisture: Saturated to moist
Salinity tolerance: None
Fire tolerance: Medium
Transplanting success: High
Growth rate: Rapid
Form: Deciduous shrub to 10 feet; branching, fibrous, shallow roots
Comments: Super plant for hummingbirds and other pollinators
Mahonia nervosa
Exposure: Shade
Soil moisture: Moist to dry
Salinity tolerance: None
Fire tolerance: High
Transplanting success: Medium
Growth rate: Slow
Form: Evergreen shrub to 2 feet; taproot, spreads by underground stems
Comments: Plant in shade; mulch; irrigate
Morella californica
Exposure: Full sun to shade
Soil moisture: Moist but well-drained
Salinity tolerance: High
Fire tolerance: Low
Transplanting success: High
Growth rate: Moderate to rapid
Form: Broadleaf evergreen shrub to 15 feet
Comments: Requires well-draining soils
You can deep dive into Pacific wax myrtle on our blog post, Pacific Wax Myrtle Hedges for Privacy & Habitat!
Oemleria cerasiformis
Exposure: Partial shade to shade
Soil moisture: Moist to dry
Salinity tolerance: Low
Fire tolerance: Unknown
Transplanting success: High
Growth rate: Moderate to rapid
Form: Deciduous small tree to 15 feet; branching, fibrous, shallow root system
You can deep dive into osoberry in our Plant of the Month Archive!
Philadelphus lewisii
Exposure: Full sun to partial shade
Soil moisture: Moderately moist to dry
Salinity tolerance: None
Fire tolerance: Low
Transplanting success: Medium to high
Growth rate: Rapid
Form: Deciduous shrub to 10 feet; moderately deep, branching roots
Comments: Requires moist, but well-draining soils.
You can deep dive into mock orange in our Plant of the Month Archive!
Physocarpus capitatus
Exposure: Full sun to shade
Soil moisture: Wet to moist
Salinity tolerance: None
Fire tolerance: None
Transplanting success: High
Growth rate: Rapid
Form: Deciduous shrub to 12 feet; fibrous, shallow root system, spreads by suckers
Comments: Very versatile along the moisture spectrum. Great for urban screening or green stormwater infrastructure and rural restoration sites alike!
Ribes divaricatum
Exposure: Partial shade to shade
Soil moisture: Wet to moist
Salinity tolerance: Unknown
Fire tolerance: Unknown
Transplanting success: Medium
Growth rate: Moderate
Form: Thorny, deciduous shrub to 8 feet; branching root system
Rosa gymnocarpa
Exposure: Partial shade to shade
Soil moisture: Moist to dry
Salinity tolerance: None
Fire tolerance: Medium
Transplanting success: Medium
Growth rate: Moderate
Form: Deciduous shrub to 6 feet; spreads by suckers
Rosa nutkana
Exposure: Full sun to partial shade
Soil moisture: Wet to moist, dry okay if shaded
Salinity tolerance: Low
Fire tolerance: High
Transplanting success: High
Growth rate: Rapid
Form: Deciduous shrub to 10 feet; branched, fibrous, shallow roots, spreads vigorously by suckers
Comments: Very versatile along the moisture spectrum
Rosa pisocarpa
Exposure: Full sun to partial shade
Soil moisture: Saturated to moist
Salinity tolerance: None
Fire tolerance: Unknown
Transplanting success: High
Growth rate: Rapid
Form: Deciduous shrub to 8 feet; branched root system, spreads vigorously by suckers
Rubus parviflorus
Exposure: Full sun to shade
Soil moisture: Moist
Salinity tolerance: None
Fire tolerance: High
Transplanting success: High
Growth rate: Rapid
Form: Deciduous shrub 3-8 feet; spreads vigorously by suckers
Comments: Good choice for riparian areas. Very versatile along the moisture spectrum
Rubus spectabilis
Exposure: Partial shade to shade
Soil moisture: Wet to moist
Salinity tolerance: None
Fire tolerance: High
Transplanting success: Medium to high
Growth rate: Moderate to rapid
Form: Deciduous shrub to 12 feet; fibrous shallow roots, spreads by suckers
Comments: Needs moisture in summer, soil cannot dry out completely
You can deep dive into salmonberry in our Plant of the Month Archive!
Salix geyeriana
Exposure: Full to part sun
Soil moisture: Saturated to dry
Salinity tolerance: None
Fire tolerance: High
Transplanting success: Unknown
Growth rate: Rapid
Form: Multi-stemmed deciduous shrub to 15 feet
Comments: Good rooter, prefers year-round saturated soil, inundated banks and muddy shores
Information sourced from OregonFlora and the USDA Plant Characteristics database in addition to our Species Selection Guide.
Sambucus racemosa
Exposure: Full sun to shade
Soil moisture: Moist to dry
Salinity tolerance: None
Fire tolerance: High
Transplanting success: Medium
Growth rate: Rapid
Form: Deciduous shrub to 20 feet; fibrous, branching, shallow root system
Symphoricarpos albus
Exposure: Full sun to shade
Soil moisture: Very moist to dry
Salinity tolerance: Medium
Fire tolerance: High
Transplanting success: High
Growth rate: Rapid
Form: Deciduous shrub to 2-6 feet; fibrous, shallow root system, spreads vigorously by suckers
Comments: Very versatile along the moisture spectrum
Vaccinium ovatum
Exposure: Partial shade to shade
Soil moisture: Moist to dry
Salinity tolerance: None
Fire tolerance: Medium
Transplanting success: Medium
Growth rate: Slow until established
Form: Evergreen shrub to 12 feet; fibrous, shallow root system
Comments: Requires moist, but well-draining soils
You can deep dive into our PNW Hucks on our blog post, Huckleberries as Specimen Shrub Candy for your Eyes and Tongue!
Vaccinium parvifolium
Exposure: Shade to deep shade
Soil moisture: Moist to dry
Salinity tolerance: None
Fire tolerance: High
Transplanting success: Low to medium
Growth rate: Slow until established
Form: Deciduous shrub to 12 feet; deep and spreading, woody roots
Comments: Plant in shade and mulch with wood chips. Irrigate but don't over-water. Requires moist, but well-draining soils
You can deep dive into our PNW Hucks on our blog post, Huckleberries as Specimen Shrub Candy for your Eyes and Tongue!
Floor Layer
Adiantum aleuticum
Exposure: Partial shade to shade
Soil moisture: Moist
Salinity tolerance: None
Fire tolerance: Medium
Transplanting success: High
Growth rate: Moderate to slow
Form: Perennial herb to 2 feet, rhizomatous
Arctostaphylos uva-ursi
Exposure: Full sun to partial shade
Soil moisture: Moist to dry
Salinity tolerance: Medium
Fire tolerance: Low
Transplanting success: Medium
Growth rate: Slow until established
Form: Evergreen shrub or groundcover to 8 inches, mat forming with stolons
Bloom color: Pinky-white
Comments: Requires well-draining soils
You can deep dive into kinnikinnik and other groundcovers on our blog post, Groundcovers: the Quick, the Evergreen, the Sunny & the Shady!
Athyrium filix-femina
Exposure: Partial shade to shade
Soil moisture: Wet to moist
Salinity tolerance: None
Fire tolerance: Low
Transplanting success: High
Growth rate: Moderate to high
Form: Deciduous fern with fronds to 6 feet, from stout rhizomes
Carex leptopoda
Exposure: Partial to full shade
Soil moisture: Moist
Salinity tolerance: None
Fire tolerance: High
Transplanting success: High
Growth rate: Rapid
Form: Loose tufts to 26 inches, no rhizomes
Comments: Slender-foot sedge is one of our only shady-sedges, which makes it a very special plant!
Cornus unalaschkensis
Exposure: Partial shade to shade
Soil moisture: Moist
Salinity tolerance: None
Fire tolerance: High
Transplanting success: Moderate
Growth rate: Slow until established
Form: Soft herbaceous perennial to 10 inches, from slender, fleshy rhizomes
Bloom color: White
You can deep dive into bunchberry in our Plant of the Month Archive!
Dicentra formosa
Exposure: Partial shade to shade
Soil moisture: Moist, dry in shade okay
Salinity tolerance: None
Fire tolerance: High
Transplanting success: High
Growth rate: Rapid
Form: Soft herbaceous perennial to 20 inches, from slender, fleshy rhizomes
Bloom color: Pink to purple
Fragaria chiloensis
Exposure: Full sun to partial shade
Soil moisture: Moist to dry
Salinity tolerance: Low
Fire tolerance: High
Transplanting success: High
Growth rate: Rapid
Form: Leathery, somewhat evergreen perennial to 10 inches, spreads by runners
Bloom color: White
Comments: Requires well-draining soils
You can deep dive into coastal strawberry on TWO of our blog posts, Groundcovers: the Quick, the Evergreen, the Sunny & the Shady and Strawberries for Groundcover & Snacks! (We don't pick favorites)....
Fragaria vesca
Exposure: Full sun to shade
Soil moisture: Moist
Salinity tolerance: Unknown
Fire tolerance: Unknown
Transplanting success: High
Growth rate: Rapid
Form: Herbaceous perennial to 12 inches, spreads by runners
Bloom color: White
You can deep dive into woodland strawberry on our blog post, Strawberries for Groundcover & Snacks!
Linnaea borealis
Exposure: Partial shade to deep shade
Soil moisture: Moist
Salinity tolerance: Unknown
Fire tolerance: Unknown
Transplanting success: Low to medium
Growth rate: Moderate
Form: Semi-woody evergreen to 4 inches with long, leafy runners (stolons)
Bloom color: White
Polystichum munitum
Exposure: Partial shade to shade
Soil moisture: Moist to dry
Salinity tolerance: None
Fire tolerance: Medium
Transplanting success: High
Growth rate: Moderate
Form: Evergreen fern with fronds to 5 feet, woody rhizomes
Struthiopteris spicant
Exposure: Shade
Soil moisture: Wet to moist
Salinity tolerance: None
Fire tolerance: Medium
Transplanting success: High
Growth rate: Moderate
Form: Evergreen fern with fronds to 2 feet
Tolmiea menziesii
Exposure: Partial shade to shade
Soil moisture: Moist to wet
Salinity tolerance: Unknown
Fire tolerance: Unknown
Transplanting success: High
Growth rate: Rapid
Form: Herbaceous perennial to 30 inches, well-developed rhizomes
Bloom color: Pink