The majority of Florida is comprised of sandy soil, also referred to as Myakka – the Native American word for “big waters”. Southern Florida soil often contains more limestone due to the limestone bedrock below the surface. Meanwhile, Northern Florida soils in the panhandle contain small amounts of clay.
Both types have advantages and disadvantages. Central and South Florida soils are more susceptible to soil washout due to sandy soil’s loose properties. Northern Florida soils with small deposits of clay may absorb water a bit better, so they can avoid washout easier. However, clay is much more susceptible to shrinking when it becomes dry.
The hot Florida sun can cause North Florida soil to crack and shrink after a storm, potentially causing foundation damage. South Florida soils are less likely to be affected by shrinkage, but it can happen anywhere. Either way, all soil in Florida is sandy at its core. Florida’s regular rain and storms can cause foundation damage, so be aware of the soil in your area and take precautions accordingly.