Debra Knapke, the self-described "Garden Sage," is the author of several books on plants and gardening, including "Perennials for Ohio," "Annuals for Ohio," "Herb Gardening for the Midwest," and "Best Garden Plants for Ohio." Knapke, a native Ohioan and horticulturist who also serves as an instructor at Columbus State Community College, visits Writers Talk to share her gardening expertise with student host Chris Sawan.