| Rating | Book | Author |
 (1) | K-I-S-S Guide to Gardening (Keep It Simple Series) | L. Patricia Kite |
| Kalmia: Mountain Laurel and Related Species | Richard A. Jaynes |
| (1) | Kaufman Field Guide to Insects of North America | Kenn Kaufman |
| (1) | Keep Chickens! Tending Small Flocks in Cities, Suburbs, and Other Small Spaces | Barbara Kilarski |
| Keeping Food Fresh: Old World Techniques & Recipes | Claude Aubert |
| Keeping It Living | Douglas Deur |
| Keeping the Garden in Bloom: Watering, Dead-Heading, and Other Summer Tasks (Seasonal Garden Workbook, Vol 5) | Steve Bradley |
| Keeping the Harvest : Preserving Your Fruits, Vegetables & Herbs (Down-To-Earth Book) | Nancy Chioffi |
| Ken Druse: The Passion for Gardening | Ken Druse |
| Kentucky Bird Watching: A Year-Round Guide | Bill Thompson, III |
| Kentucky Gardener's Guide | Denny McKeown |
| Kid's Gardening Journal: A Gardening Journal Just for Kids | |
| Kids in the Garden: Growing Plants for Food and Fun | Elizabeth McCorquodale |
| Kids in the Wild Garden: Fun Activities for the Great Outdoors | Elizabeth McCorquodale |
| Kitchen Garden Planner | Darrell Trout |
 (1) | Kitchen Gardens in Containers | Anthony Atha |
| (1) | Kitchen Gardens of France | Louisa Jones |
| (1) | Kitchen Harvest: A Cook's Guide to Growing Organic Vegetables, Fruits and Herbs in Containers | Susan Berry |
| Kiyosumi teien, a Japanese garden | Anika Ogusu |
| (1) | Knot Gardens and Parterres: A History of the Knot Garden and How to Make One Today | Robin Whalley |
| Know Your Houseplants | Jack Kramer |
| Know Your New Zealand Trees | Lawrie Metcalf |
| Koishikawa Korakuen, a Japanese Garden | Anika Ogusu |
