Putnam County Soil Data
Putnam County, Florida
Avg pH
4.7
Texture
Sand
Drainage
N/A
Organic Matter
8.5%
Hydrologic Group
N/A
Data Story
About Soil in Putnam County, Florida
Deeply Acidic Putnam Soils
Putnam County features an average pH of 4.72, which is more acidic than both the Florida state average of 4.88 and the national median of 6.5. This high acidity is a defining characteristic that dictates what can grow successfully without significant soil amendments. It reflects the county's history of pine forests and wetlands.
Classic Florida Sandy Profile
The soil composition is 85.2% sand, 2.5% silt, and 2.7% clay. This mix provides very little natural structure, resulting in soil that is easy to till but prone to erosion if left uncovered. The low clay content means the soil does not compact easily, which is good for root expansion.
High Organic Content Supports Growth
At 8.54%, the organic matter content in Putnam is higher than the state average of 8.03% and far exceeds the national average. This richness helps the soil reach an available water capacity of 0.118 in/in, outperforming the state typical of 0.108. These fertile pockets are vital for maintaining moisture in sandy terrain.
Missing Hydrology Data for Putnam
Specific drainage and hydrologic group classifications are not available for this record. However, the high organic matter and sand content usually suggest a soil that can hold moisture while still allowing excess to drain. Observe the areas around the St. Johns River to see how the water table interacts with your local soil.
Blueberry Heaven in Zone 9b
The acidic, organic-rich soil of Putnam County is ideal for blueberries and azaleas, which thrive in Zone 9b. You can also successfully grow various types of oak and pine that handle the low pH naturally. Get started by planting native species that love the local conditions.
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: Sand
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Putnam County have?
Putnam County's soil is classified as Sand. This indicates the relative proportions of sand, silt, and clay — 85% sand, 3% silt, and 3% clay. Sandy soils drain quickly but may need more frequent irrigation and fertilization.
Is Putnam County's soil acidic or alkaline?
Putnam County's soil has a low pH of 4.7, which is strongly acidic. Acidic soils benefit from lime applications to raise pH and improve nutrient availability.
What is the drainage class for Putnam County?
Drainage class data is not currently available for Putnam County.
What crops or plants grow well in Putnam County's soil?
Based on Putnam County's Sand texture, pH of 4.7, and drainage class, the soil is well suited for acid-loving plants like blueberries and azaleas, drought-tolerant crops, root vegetables, and sandy-soil specialists.
What USDA soil order is found in Putnam County?
The dominant USDA soil order for Putnam County is not currently available in our dataset.
Planning your lawn? View lawn care data for Putnam County on LawnByCounty.com →
Other Counties in Florida
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.