The Best Peat Moss In Raised Garden Beds References. Web using peat moss in raised beds 50% topsoil — choose loamy topsoil to make up the bulk of your homemade soil mixture. Peat moss is used to add structure and water holding capacity to your raised beds.
Embarking on the journey of planting in a raised garden bed is both an art and a science. Web peat moss is a good source of organic matter but it does not have a significant amount of garden nutrients. If you go to any garden store, you’ll find large bags of sphagnum peat moss.