Fort Smith sits where the Arkansas and Poteau rivers converge, and the clay loam soils throughout the valley hold water stubbornly long after a hard rain passes through. With close to 47 inches of annual rainfall, poorly amended beds swing between waterlogged and baked concrete depending on the season, making quality topsoil and proper mulching genuinely necessary here rather than optional. The terrain shifts from flat bottomlands along the river corridor to rolling ground pushing toward Greenwood and the Ouachita foothills, each setting carrying different drainage and erosion demands. Customers from Van Buren and Alma face the same tight soil challenges just miles away along the river. Whether you are refreshing beds near the Fort Smith National Historic Site or building out a new hillside yard, the right materials make this climate manageable.