It is important to match species requirements with site features such as soil type, light conditions, moisture and drainage for the planting to be successful. Mesic (medium) soil types drain well but contain moisture all or most of the time. Clay soils will hold higher moisture levels and sandy soils are often drier as they will drain faster. Some plants are more sensitive to conditions such as moisture and light, so it is best to match your conditions with those described for each plant or flat in the seller’s catalog.
Native plants for different gardens / landscaping situations by Terry Serres (PDF)