If you have taken on the task of building your own bed, you should keep in mind to have at least 12? of top soil. This will be optimal for your plants root systems to grow and flourish. Be sure you use ?Garden Mix? and not just loam to help your plants the proper nutrients for the transition from pots to the ground. Raised beds are recommended because they look beautiful and a good edger will help prevent annoying grass from growing in your beds.