Wentzville sits at 587 feet across the rolling terrain of St. Charles County, where the clay-heavy soil beneath so many of its newer subdivisions creates real headaches for homeowners trying to establish healthy beds and lawns. That dense clay compacts easily under foot traffic and construction equipment, leaving roots gasping and rainwater pooling rather than draining after the region's 43 inches of annual rainfall do their work. Neighbors in Lake St. Louis and Troy face the same uphill battle, amending beds season after season to coax perennials and shrubs into soil that was never easy to work. Around Quail Ridge Park and the growing neighborhoods fanning out along the I-70 corridor, a thick layer of quality mulch is often the difference between plants that survive a Zone 6b winter and ones that heave right out of the ground. Whether you are breaking new ground near Union or refreshing mature beds in Ellisville, the right combination of amended soil, mulch, and drainage stone goes a long way in this part of Missouri.