The Dellwood series consists of moderately well drained, moderately rapidly to very rapidly permeable soils formed in dominantly coarse-textured alluvium on flood plains in the Southern Appalachian Mountains. These soils are shallow to sandy material that has more than 35 percent by volume of gravel and cobbles. Near the type location, average annual precipitation is about 50 inches, and mean annual temperature is about 53 degrees F. Slope ranges from 0 to 5 percent. Dellwood cobbly sandy loam on a 2 percent slope in a hay field. Solum thickness and depth to coarse-textured material that contains more than 35 percent by volume rounded gravel and cobbles is 8 to 20 inches.
Reaction is very strongly acid to neutral.
Content of mica flakes ranges from none to common. Organic matter content is irregular with depth. Dry value is less than 5.5. The upper A or Ap horizons are fine sandy loam, or sandy loam in the fine-earth fraction. In some pedons, the lower part of the A horizon is loamy sand or loamy fine sand in the fine-earth fraction and contains 35 to 60 percent gravel and cobbles by volume.