Silsbee soils are well drained. Runoff is low on 3 to 5 percent, and medium on 5 to 12 percent slopes. Permeability is moderate. Some areas are used for pastureland. Pastures are bahiagrass and improved bermudagrass.
Native vegetation is longleaf pine, yaupon, bluestems, panicums and paspalums.
The series is of moderate extent. The Silsbee soils were formerly inluded with the Otanya and Attoyac series.