Thre are many great choices including perennials, groundcovers, shrubs, etc...in fact too many to know where to begin. In order to provide you with more information than we can fit in this brief answer, let me refer you to the following web sites, which should be very informative and useful to you. They will give you much more information than I can fit in this brief reply.
Your County Extension Office should also have some free information on hand listing plants adapted to your local conditions.
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