Topsoil-and-compost bulk blend (60/40 or 50/50)

The most cost-effective way to fill raised beds is ordering bulk screened topsoil mixed with compost, typically delivered by the cubic yard from landscape supply companies. A 60% topsoil / 40% compost blend (by volume) provides a balanced growing medium at a fraction of bagged mix costs. Bulk delivery for a 4x8x12-inch bed (approximately 1 cubic yard) costs $30-60 delivered, compared to $150+ for bagged ingredients. The mineral content in topsoil provides structure, trace minerals, and weight that pure compost mixes lack. Request screened topsoil (not fill dirt) to avoid rocks and debris. Ask the supplier about compost sources and whether the topsoil has been tested. Before filling, examine a sample: good topsoil should be dark, crumbly, and free of clay clumps. Add perlite or coarse sand (10-15% by volume) if the blend feels heavy or drains slowly. This approach works best for beds with ground contact where roots can extend into native soil below.