This is the final installment of my information from the 2014 Carolina Yard Gardening School. (If you missed the previous five articles, please see the links at the end of this post.) Most gardeners are aware of how helpful worms are to our soil. They not only aerate the soil, but they also create worm castings that are full of nutrients. You can either purchase worm castings or create your own through worm composting. How to Make Worm Compost!