+22 What Dirt For Raised Garden Bed References. The calculator automatically figures out how many bags of soil you need. Web after filling the bottom of your raised bed with the appropriate natural materials, it is time to add soil to the bed.

Of course, a raised bed can be even simpler than that: Adding vermicompost (composted worm manure) to your raised bed gardens will provide another layer of organic richness. Many gardeners choose to fill the entire raised bed with same kind of soilless potting mixture used for portable containers.