Review Of Raised Garden Bed Planting Mix Ideas. The bulk of my raised bed soil consists of high quality topsoil, about 50% by volume. This timber raised garden bed has two tiered levels and is finished off with a high trellis at the back for growing vertically.

The combination creates a soil that has good drainage and holds onto water and nutrients, while providing all the vital nutrients for the plants. You can make your own compost or buy it from a nursery or gardening center. Web look for a good quality potting mix or garden soil that has plenty of organic matter.