Wahkiakum County Soil Data
Wahkiakum County, Washington
USDA SSURGO / PHZMAvg pH
N/A
Texture
Unknown
Drainage
N/A
Organic Matter
N/A
Hydrologic Group
N/A
Data Story
About Soil in Wahkiakum County, Washington
Coastal Influences on Soil Chemistry
Wahkiakum County lacks specific soil pH and taxonomic records in the current survey. Given its location in the rainy coastal corridor, the soil likely mirrors the state average pH of 6.20, which is slightly more acidic than the national 6.5 baseline.
Riverine Composition and Texture
Comprehensive data on sand, silt, and clay percentages is currently unavailable for this territory. Growers in the area typically manage the heavier, moisture-rich textures characteristic of the lower Columbia River landscape.
Biomass and Regional Fertility
We lack specific local figures for organic matter, but the region's high rainfall supports significant biomass. This generally hints at fertility levels that meet or exceed the state organic matter average of 14.85%.
Navigating High-Moisture Environments
Drainage and hydrologic data are currently unrecorded for this specific coastal county. Professional site assessments are recommended to navigate the high-moisture conditions typical of the local riverfront and hill lands.
Lush Growth in Zone 8b
Hardiness Zone 8b provides Wahkiakum gardeners with a gentle, frost-free climate for much of the year. This environment is ideal for cool-weather crops like kale and peas, as well as flowering rhododendrons.
Soil Composition
Composition data not available for this county.
Soil pH
pH data not available for this county.
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Hydrologic group data not available.
Drainage Class
Drainage class data not available.
Soil Profile
Dominant texture: Unknown
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Soil Amendment Products
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Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Wahkiakum County have?
Wahkiakum County's soil is classified as Unknown. This indicates the relative proportions of sand, silt, and clay — sand percentage unavailable, silt percentage unavailable, and clay percentage unavailable. Sandy soils drain quickly but may need more frequent irrigation and fertilization.
Is Wahkiakum County's soil acidic or alkaline?
pH data is not available for Wahkiakum County.
What is the drainage class for Wahkiakum County?
Drainage class data is not currently available for Wahkiakum County.
What crops or plants grow well in Wahkiakum County's soil?
Based on Wahkiakum County's Unknown texture, soil pH, and drainage class, the soil is well suited for a variety of crops depending on local conditions.
What USDA soil order is found in Wahkiakum County?
The dominant USDA soil order for Wahkiakum County is not currently available in our dataset.
Soil & Planting Advisory: Wahkiakum County
Soil Verdict
Wahkiakum County is in USDA hardiness zone 8b, a warm climate zone. where winter lows can reach 15°F. Mild winters mean soil rarely freezes deeply, allowing year-round microbial activity and faster organic matter breakdown.
Planting Guidance
Warm-season crops, citrus relatives, and heat-loving ornamentals do well. Cool-season vegetables should be planted in fall and winter. Always match plant selections to the specific microclimate of your property — low spots, slopes, and wind exposure can shift effective hardiness by half a zone.
Soil Implications
Warm soils accelerate organic matter breakdown, so compost and mulch need replenishing more frequently than in cooler zones. Sandy soils common in warm zones drain quickly; water-retentive amendments like compost or peat help hold moisture.
Regional Context
Wahkiakum County is somewhat warmer than the Washington statewide average.
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Other Counties in Washington
Soil data sourced from USDA SSURGO via Soil Data Access. Data is informational only and should not be used as a substitute for on-site soil testing. Contact your local NRCS office for site-specific soil information.