| Rating | Book | Author |
 (1) | Made for the Shade | Judy Glattstein |
| (2) | Magic and Medicine of Plants | Reader's Digest Editors |
| (1) | Magic of Irises | Barbara Perry Lawton |
| Magnolias: A Gardener's Guide | Jim Gardiner |
| Make Friends with Your Lawn | Jerry Baker |
| Making a Garden on a Greek Hillside | Mary Jaqueline Tyrwhitt |
| Making an Herb Garden: Beautiful Designs, Plantings and Ornamentation | Catherine Mason |
| Making and Using a Flower Press | Leslie Noyes |
| Making Concrete Garden Ornaments | Sherri Warner Hunter |
| Making Garden Floors: Stone, Brick, Tile, Concrete, Ornamental Gravel, Recycled Materials & More | Paige Gilchrist Blomgren |
| Making Gardens: An Essential Guide to Planning and Planting | Patrick Taylor |
| (18) | Making More Plants: The Science, Art, and Joy of Propagation | Ken Druse |
| Making Paths and Walkways: Stone, Brick, Bark, Grass, Pebbles and more | Paige Gilchrist Blomgren |
| (1) | Making Plant Medicine | Richo Cech |
| (1) | Making Sauerkraut and Pickled Vegetables at Home: Creative Recipes for Lactic Fermented Food to Improve Your Health | Klaus Kaufmann |
| Making the Most of Clematis | Jane Robinson |
| Making the Most of Conifers and Heathers | Adrian Bloom (photographer) |
| (3) | Making the Most of Shade: How to Plan, Plant, and Grow a Fabulous Garden that Lightens Up the Shadows | Larry Hodgson |
| Making Your Small Farm Profitable: 20 Guiding Principles, New Crops and New Markets, Maximize Net Profits Per Acre | Ron Macher |
| (1) | Malcolm Hillier's Color Garden | Malcolm Hillier |
| Manual of Bulbs (New Royal Horticultural Society Dictionary) | John E. Bryan |
| Manual of Cultivated Broad-Leaved Trees and Shrubs | Gerd Krussmann |
| Manual of Cultivated Conifers | Gerd Krussmann |
| Manual of Grasses (New Royal Horticultural Society Dictionary) | Rick Darke |
| Manual of Herbaceous Ornamental Plants | Steven M. Still |
| Manual of Orchids (New Royal Horticultural Society Dictionary) | Joyce Stewart |
| (4) | Manual of Woody Landscape Plants: Their Identification, Ornamental Characteristics, Culture, Propagation and Uses | Michael A. Dirr |
| (1) | Manual to the Palms of Ecuador | Finn Borchsenius |
| (1) | Maples for Gardens: A Color Encyclopedia | C.J. van Gelderen |
| Maples of the World | D.M. van Gelderen |
| Mark Catesby's Natural History of America | Henrietta McBurney |
| (2) | Masdevallias: Gems of the Orchid World | Mary E. Gerritsen |
| (9) | McGee & Stuckey's Bountiful Container: A Container Garden of Vegetables, Herbs, Fruits, and Edible Flowers | Rose Marie Nicols McGee |
| Meadows | Christopher Lloyd |
| Medicinal Herbs in the Garden, Field & Marketplace (Bootstrap Guide) | Lee Sturdivant |
| Medicinal Plants of the World | Ben-Erik van Wyk |
| Mediterranean Plants and Gardens | Roy Lancaster |
| Meet the Natives: A Beginner's Guide to Rocky Mountain Wildflowers, Trees, and Shrubs. tenth edition | M. Walter Pesman |
| (1) | Meetings with Remarkable Trees | Thomas Pakenham (photographer) |
| Melons for the Passionate Grower | Amy Goldman |
| (1) | Merry Hall | Beverley Nichols |
| (1) | Mesembs Of The World | Gideon F. Smith |
| (1) | Michigan Gardener's Guide (revised edition) | Marty Hair |
| Microwaved Pressed Flowers: New Techniques for Brilliant Pressed Flowers | Joanna Sheen |
| Mid-Atlantic Gardener's Guide: Delaware, Maryland, Virginia, and Washington D.C | Andre Viette |
| (2) | Mid-Atlantic Home Landscaping (rev. edition) | Roger Holmes |
| Midwest Gardens | Pamela Wolfe |
| Midwest Home Landscaping, Including Southern Canada (rev. edition) | Roger Holmes |
| Miniature Orchids | Steven A. Frowine |
| Miniature Trees: Their Care & Maintenance (Secrets of Bonsai Series, Vol 3) | Charles Harnett |
| (1) | Miniatures and Bonsai (Time-Life Encyclopedia of Gardening series) | James Underwood Crockett |
| Mint (The Herb Library Series) | Kate Ferry-Swainson |
| (2) | Mints: A Family of Herbs and Ornamentals | Barbara Perry Lawton |
| (1) | Miracle Under The Oaks: The Revival of Nature in America | William K. Stevens |
| Mississippi Gardener's Guide | Norman Winter |
| Missouri Gardener's Guide (Revised Edition) | Mike Miller |
| (1) | Mittleider Grow-Box Gardens (aka More Food From Your Garden) | Jacob R. Mittleider |
| Modern Roses (Little Plant Library) | Andrew Mikolajski |
| Modern Roses 10 | Thomas Cairns |
| (1) | Modern Roses XI : The World Encyclopedia of Roses | Thomas Cairns |
| Monet The Gardener | Robert Gordon |
| Month-by-month Gardening In Alabama | Bob Polomski |
| Month-by-Month Gardening in Alabama & Mississippi: What to Do Each Month to Have a Beautiful Garden All Year | Bob Polomski |
| (2) | Month-by-Month Gardening in Florida: Revised Edition | Tom MacCubbin |
| (2) | Month-by-Month Gardening in Georgia: Revised Edition: What to Do Each Month to Have a Beautiful Garden All Year | Walter Reeves |
| Month-By-Month Gardening in Idaho | John Cretti |
| Month-by-Month Gardening in Illinois: Revised Edition: What to Do Each Month to Have a Beautiful Garden All Year | James A. Fizzell |
| Month-by-Month Gardening in Indiana: Revised Edition: What to Do Each Month to Have a Beautiful Garden All Year | James A. Fizzell |
| Month-by-Month Gardening in Iowa | Melinda Myers |
| Month-by-Month Gardening in Louisiana: Revised Edition: What to Do Each Month to Have a Beautiful Garden All Year | Dan Gill |
 (1) | Month-by-Month Gardening in Michigan: Revised Edition: What to Do Each Month to Have a Beautiful Garden All Year | James A. Fizzell |
| (1) | Month-by-Month Gardening in Minnesota: Revised Edition: What to Do Each Month to Have a Beautiful Garden All Year | Melinda Myers |
| Month-By-Month Gardening in Missouri: What to Do Each Month to Have a Beautiful Garden All Year | Mike Miller |
| Month-by-Month Gardening in Montana | John Cretti |
| Month-By-Month Gardening in New England: What to Do Each Month to Have a Beautiful Garden All Year | Jacqueline Heriteau |
| Month-By-Month Gardening in New Jersey: What to Do Each Month to Have a Beautiful Garden All Year | Pegi Ballister-Howells |
| Month-By-Month Gardening in New York: What to Do Each Month to Have a Beautiful Garden All Year | Andre Viette |
| Month-By-Month Gardening in Ohio (Revised Edition): What To Do Each Month To Have a Beautiful Garden All Year | Denny McKeown |
| Month-by-Month Gardening In Oklahoma And Arkansas: What To Do Each Month To Have a Beautiful Garden All Year | Steve Dobbs |
| Month-by-Month Gardening in Pennsylvania: Revised Edition: What to Do Each Month to Have a Beautiful Garden All Year | Liz Ball |
| Month-by-month Gardening In Tennessee And Kentucky: What To Do Each Month To Have a Beautiful Garden All Year | Judy Lowe |
| (2) | Month-by-Month Gardening in Texas: Revised Edition: What to Do Each Month to Have a Beautiful Garden All Year | Dale Groom |
| Month-by-Month Gardening in the Carolinas: Revised Edition: What to Do Each Month To Have a Beautiful Garden All Year | Bob Polomski |
| (1) | Month-by-month Gardening In The Desert Southwest | Mary F. Irish |
| Month-by-Month Gardening in the Deserts of Arizona | |
| Month-by-Month Gardening in the Deserts of Nevada | Mary F. Irish |
| Month-by-month Gardening In The Mid-Atlantic: What To Do Each Month To Have a Beautiful Garden All Year | Jacqueline Heriteau |
| Month-By-Month Gardening in the Prairie Lands: What to Do Each Month to Have a Beautiful Garden All Year | Cathy Wilkinson Barash |
| Month-By-Month Gardening in Utah | John Cretti |
| Month-By-Month Gardening in Washington & Oregon: What To Do Each Month To Have A Beautiful Garden All Year | Mary Robson |
| Month-by-Month Gardening in Wisconsin: Revised Edition: What to Do Each Month to Have a Beautiful Garden All Year | Melinda Myers |
| (1) | Month-to-Month Perennial and Shrub Maintenance Chart for the Mid-Atlantic Region | Nancy A. Burns |
| Morning Glories & Moonflowers: A Guide to Climbing, Trailing, & Cascading Plants | Anne Moyer Halpin |
| Moss Gardening: Including Lichens, Liverworts, and Other Miniatures | George Schenk |
| Moth Orchids: The Complete Guide to Phalaenopsis | Steven A. Frowine |
| (1) | Movable Harvests: Fruits, Vegetables, Berries, The Simplicity & Bounty of Container Gardens | Chuck Crandall |
| (1) | Mrs. Greenthumbs Plows Ahead | Cassandra Danz |
| (1) | Mrs. Greenthumbs: How I Turned a Boring Yard into a Glorious Garden and How You Can, Too | Cassandra Danz |
| Mulch (A Gardening Mystery) | Ann Ripley |
| Mulch It!: A Practical Guide to Using Mulch in the Garden and Landscape | Stu Campbell |
| Murder Sets Seed (Bretta Solomon Gardening Mysteries) | Janis Harrison |
| Mushrooms of Northeast North America: Midwest to New England | George Barron |
| My Connecticut Garden: Personal Experiences of an Amateur Gardener | George Valchar |
| My Garden in Autumn and Winter (My Garden Series) | E.A. Bowles |
| My Garden in Spring (My Garden Series) | E.A. Bowles |
| My Garden in Summer (My Garden Series) | E.A. Bowles |
| My Greenhouse Journal | Greta Heinen |
| My Kentucky Garden: A Gardener's Journal | Denny McKeown |
| My Ohio Garden: A Gardener's Journal | Denny McKeown |
| My Summer in a Garden | Charles Dudley Warner |
| My Texas Garden: A Gardener's Journal | Dale Groom |
| (1) | My Weeds: A Gardener's Botany | Sara B. Stein |
| My Wisconsin Garden: A Gardener's Journal | Melinda Myers |
