The type of soil needed for your shade plants is dependent upon variety. Some shade plants, such as coral bells and hosta, can tolerate poor soil quality, and even pollution, making them perfect for rocky soils and urban areas. However, most shade plants prefer rich, fertile soil, which can be troubling in a garden that may have trees, shrubs, and nearby sun perennials competing for nutrients in the soil. Apply a balanced fertilizer in the spring, and consider dressing your shade garden in compost before laying out winter mulch. If you find that your shade plants seem to be wilting or weak, check your soil with a home test or contact your local extension office for help.