The type of soil most common in the Coastal Plains is Sandy and alluvial soil.

The Coastal Plains are characterized by sandy and alluvial soil, which is common throughout the region. This type of soil is formed from sediment deposited by rivers and streams, making it nutrient-rich and fertile. Sandy soil offers excellent drainage, while alluvial deposits contribute to its richness, supporting a diverse range of plant life and agriculture. These conditions make the Coastal Plains ideal for farming, with crops such as cotton, soybeans, and rice thriving in this environment. The unique soil composition not only sustains local agriculture but also plays a vital role in maintaining the region's ecosystems and biodiversity.