Knox County Soil Data
Knox County, Maine
USDA SSURGO / PHZMAvg pH
N/A
Texture
Unknown
Drainage
N/A
Organic Matter
N/A
Hydrologic Group
N/A
Data Story
About Soil in Knox County, Maine
Acidic Bay-Side Horizons
Knox County’s soil profile is dictated by its coastal location and rocky Penobscot Bay heritage. These soils are generally much more acidic than the national median of 6.5, a result of the region's dominant conifer forests.
Diverse Coastal Sediments
Precise sand, silt, and clay percentages are not available in the current dataset. Local soils vary from sandy coastal deposits to heavier silts found in the sheltered inland valleys.
Productive Small-Farm Soils
Although specific local organic matter data is missing, the state’s high 35.77% average is a good indicator of the rich growing potential here. This biological richness supports the county's vibrant small-scale farming scene.
Monitoring Bedrock Runoff
Mapped drainage and hydrologic data are unavailable for this county. Gardeners should check for bedrock proximity, as shallow soils along the coast can lead to rapid runoff or localized pooling.
Temperate Growth in Zone 6a
Hardiness Zone 6a offers a relatively mild coastal climate for Maine growers. The area is famous for its berries and hardy perennials that can handle the salt air and acidic forest soil.
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 Knox County have?
Knox 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 Knox County's soil acidic or alkaline?
pH data is not available for Knox County.
What is the drainage class for Knox County?
Drainage class data is not currently available for Knox County.
What crops or plants grow well in Knox County's soil?
Based on Knox 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 Knox County?
The dominant USDA soil order for Knox County is not currently available in our dataset.
Soil & Planting Advisory: Knox County
Soil Verdict
Knox County is in USDA hardiness zone 6a, a moderate climate zone. where winter lows can reach -10°F. Freeze-thaw cycles are moderate; soil biology slows in winter but recovers reliably in spring, supporting a broad range of plants.
Planting Guidance
A wide plant palette is possible: deciduous trees, most shrubs, cool-season vegetables, and many perennials thrive here. Winter protection (mulch, burlap wraps) helps push the zone boundary for desired species. 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
Moderate freeze-thaw cycles naturally aerate the soil but can also cause compaction in clay-heavy areas; annual core aeration is beneficial. Organic matter amendments decompose at a moderate pace — aim for 3-5% organic content for optimal fertility. When soil temperatures drop below freezing, microbial nitrogen cycling stops; spring fertilization is more effective than late-fall application.
Regional Context
Knox County is somewhat warmer than the Maine statewide average. The zone range of 5b-7a within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for Knox County on LawnByCounty.com →
Other Counties in Maine
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.