Rockingham County Soil Data
Rockingham County, New Hampshire
Avg pH
3.3
Texture
Loam
Drainage
N/A
Organic Matter
40.9%
Hydrologic Group
N/A
Data Story
About Soil in Rockingham County, New Hampshire
Highly Acidic Coastal Soil
Rockingham County has a very low pH of 3.31, making it significantly more acidic than the state average of 4.24. This level is far below the national median of 6.5, suggesting a unique and challenging chemical profile. Most traditional crops will require significant lime applications to thrive here.
Sandy Foundations Near the Coast
The soil composition consists of 32.0% sand and 6.0% clay. This creates a texture that drains well but lacks the structural 'grip' of heavier clay soils. It is easy to dig and work, making it popular for residential landscaping and gardening.
Massive Organic Reserves, Lower Capacity
Organic matter is exceptionally high at 40.86%, which is well above the state average of 32.63%. However, the available water capacity is slightly lower at 0.184 in/in compared to the state average of 0.204. This means the soil is incredibly rich in nutrients but may dry out faster than neighbors.
Rapid Drainage Challenges
With a lower water capacity and sandy profile, drainage is likely very rapid across the county. This helps prevent standing water but means gardeners must stay vigilant during the dry summer months. It is an excellent environment for plants that dislike 'wet feet' or soggy roots.
Gardeners Rejoice in Zone 6a
Zone 6a status makes this one of the warmest places to garden in New Hampshire. You can successfully grow longer-season crops like melons and tomatoes with the help of that 40.86% organic matter. Start your coastal garden today and lean into the unique benefits of this rich, sandy soil.
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
Drainage class data not available.
Soil Profile
Dominant texture: Loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Rockingham County have?
Rockingham County's soil is classified as Loam. This indicates the relative proportions of sand, silt, and clay — 32% sand, 22% silt, and 6% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Rockingham County's soil acidic or alkaline?
Rockingham County's soil has a low pH of 3.3, which is strongly acidic. Acidic soils benefit from lime applications to raise pH and improve nutrient availability.
What is the drainage class for Rockingham County?
Drainage class data is not currently available for Rockingham County.
What crops or plants grow well in Rockingham County's soil?
Based on Rockingham County's Loam texture, pH of 3.3, and drainage class, the soil is well suited for acid-loving plants like blueberries and azaleas, row crops and vegetable gardens.
What USDA soil order is found in Rockingham County?
The dominant USDA soil order for Rockingham County is not currently available in our dataset.
Planning your lawn? View lawn care data for Rockingham County on LawnByCounty.com →
Other Counties in New Hampshire
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.