Kennebec County Soil Data
Kennebec County, Maine
USDA SSURGO / PHZMAvg pH
4.1
Texture
Bedrock
Drainage
Well drained
Organic Matter
28.7%
Hydrologic Group
N/A
Data Story
About Soil in Kennebec County, Maine
Balanced Maine Acidity
Kennebec’s soil has a pH of 4.10, making it less acidic than the state average of 3.88 but still far below the national median of 6.5. This slight shift toward neutral can make nutrient uptake easier for some sensitive crops.
Gritty and Structured Soil
The soil mix contains 37.5% sand, 28.4% silt, and 7.8% clay. This balance creates a gritty, well-structured medium that resists the muckiness often found in heavier, clay-dominant soils.
Solid Organic Growth Potential
Organic matter stands at 28.72%, which is lower than the Maine average of 35.77% but still many times higher than the national average. The Available Water Capacity of 0.232 in/in is slightly below the state benchmark.
Well-Drained Bedrock Foundations
The soil is classified as well-drained with a dominant texture of bedrock. This means water moves through the profile quickly, reducing the risk of root rot but requiring more frequent watering in droughts.
Orchard Ready in Zone 5b
Falling in Hardiness Zone 5b, Kennebec is prime territory for diverse gardening. The well-drained soil is ideal for apple orchards and stone fruits that dislike wet feet during the spring thaw.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Hydrologic group data not available.
Drainage Class
Well drained
Water is removed from the soil readily but not rapidly. Optimal for most plants and construction.
Soil Profile
Dominant texture: Bedrock
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Acidic Soil Detected
Your county's average pH is 4.1. These products help balance soil pH for healthier grass.
Browse Soil AmendmentsFrequently Asked Questions
What type of soil does Kennebec County have?
Kennebec County's soil is classified as Bedrock. This indicates the relative proportions of sand, silt, and clay — 37% sand, 28% silt, and 8% clay. Sandy soils drain quickly but may need more frequent irrigation and fertilization.
Is Kennebec County's soil acidic or alkaline?
Kennebec County's soil has a low pH of 4.1, which is strongly acidic. Acidic soils benefit from lime applications to raise pH and improve nutrient availability.
What is the drainage class for Kennebec County?
Kennebec County has a dominant drainage class of "Well drained." Well-drained soils allow excess water to move through quickly, reducing waterlogging risk and supporting most field and garden crops.
What crops or plants grow well in Kennebec County's soil?
Based on Kennebec County's Bedrock texture, pH of 4.1, and Well drained, the soil is well suited for acid-loving plants like blueberries and azaleas, most annual and perennial crops.
What USDA soil order is found in Kennebec County?
The dominant USDA soil order for Kennebec County is not currently available in our dataset.
Soil & Planting Advisory: Kennebec County
Soil Verdict
Kennebec County is in USDA hardiness zone 5b, a cold climate zone. where winter lows can reach -15°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
Kennebec County closely matches the Maine average hardiness conditions. The zone range of 5a-5b within the county means soil and planting decisions should account for local elevation and topography.
Planning your lawn? View lawn care data for Kennebec 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.