| Company |
| M&R Durango Inc., Insectary |
| M&S Ponds and Supplies |
| M.P.Flower Gardens |
| MacArthur Water Gardens |
| Macevicius Farms |
| Machiela's Orchids |
| MacKenzie Nursery Supply Inc. |
| Macquarie Valley Violets |
| Madagascar Plants and Seeds |
| Made in Africa |
| Maestro-Gro, Inc. |
| Maggie's Herbs |
| Magic Garden |
| Magic Garden Seeds |
| Magic Garden® (New Tomorrow Inc.) |
| Magic Mushroom Garden Statuary |
| Magic Seeds Nursery |
| Magic Wings |
| Magic Worm Ranch |
| MagicFit Designs Inc. |
| Magma Grow LLC (Magma Grow™) |
| Maido Trading International Company (seedarea.com) |
| Mail Order Hosta |
| Mail-Order Natives (Mail Order Natives) |
| Mailorder Pet Supplies (MOPS) |
| MailOrderGarden.com |
| Main Street Orchids |
| Main Street Seed & Supply Co. |
| Maine Garden Products, Inc. |
| Maine Millstones |
| Maine Seed Saving Network |
| Maine Tomato Berry (Tomato Tom's Seed Supply) |
| MainFrame Direct |
| Mainly Amaryllids Garden |
| Mainly Bulbous Gems (formerly Baullosa Chilean Bulbs Seeds) |
| Majella Larochelle (formerly Seeds & Plants International) |
| Majestic Landscaping & Palms |
| Majestic Nursery & Gardens |
| Mak Lilies & Perennials Inc. (formerly Northwest Bulbs, LLC) |
| Malesiana Tropicals |
| Malevil Iris Gardens |
| Mallet Court Nursery |
| Mallett's Nurseries |
| Malora’s Grove |
| Mammoth Workwear |
| Man Eating Plants |
| MAN-O Products |
| Manatawny Creek Farm |
| Manchester Wildflower Seed Company |
| Manhattan Bonsai |
| Manitoba Gardener |
| Mann Lake Ltd. |
| Mann's Nursery |
| Mantis ComposT-Twin |
| Mantis Tools |
| Maple Creek Nursery |
| Maple Ridge Nursery |
| Maple Street Natives |
| Maple Valley Orchards |
| Maples By Design |
| Maples By Mail |
| Maples N More Nursery |
| Maples X Mail (Acer Spades Nursery) |
| Maplestone Ornamentals |
| Mapletopia |
| Mapple Farm |
| Mar-Low Epi House |
| Maranatha Nursery and Landscape |
| Marble Branch Farms |
| Marcelle's Crinums |
| March Biological |
| Marcia's Vermiculture Composting |
| Marco Fransen Hostas (Hostakwekerij Fransen) |
| Marcus Farms |
| Margarita Punzó Semillería |
| Marianna's Heirloom Seeds (formerly Pomodori di Marianna) |
| Marietta Gardens |
| Maril Products Inc. (Physan 20) |
| Marilyn's Own |
| Mark of Excellence Roses |
| Mark Piette Epi Galleria |
| Market Hill |
| Marks Greenhouse |
| Marlboro Bulb Company |
| Marlow Orchids |
| Maroma Seeds |
| Marriott Orchids |
| Marshall Grain Company |
| Marshall's Nursery |
| Marshalls Seeds |
| Marshaus Flower Gardens |
| Marshland Herb Nursery |
| Martha By Mail (Martha Stewart) |
| Martha Stewart Living |
| Marthas Secrets |
| Marti's Poultry Farm |
| Martin & Kraus |
| Martin Davis |
| Marugg Company (Oldest Functioning Scythe Company) |
| Mary Lake-Thompson |
| Mary Mattison van Schaik Imported Dutch Bulbs |
| Mary's Garden |
| Mary's Garden Patch |
| Mary's Harvest Thyme Aprons |
| Mary's Heirloom Seeds |
| Mary's Plant Farm Nursery |
| Maryland Aquatic Nurseries (M-A-N) |
| Maryland China |
| Maryott's Gardens |
| Mason & Murray |
| Mason Hollow Nursery |
| Mass Spectrum Botanicals |
| Master Garden Products |
| Master Landscape Pro (Punch! Software, LLC) |
| MasterGardening.com |
| Masterson's Aquatic Nursery & Water Garden Center |
| Matai Nurseries |
| Matatoa Tree & Shrub Centre |
| Matawhero Nursery (Native Garden Nursery Ltd.) |
| Matsu Momiji Bonsai Nursery |
| Matterhorn Nursery, Inc. |
| Matthews Iris Gardens |
| Mattocks Roses |
| Mattslandscape.com |
| Maui Plumeria Gardens |
| Mauna Kea Daylily Gardens |
| MAURO Seed Co. |
| Max & Minnie's Bulbs & Perennials |
| Maxwell Turf & Supply Company |
| May Tree Enterprises, LLC |
| May's Acres Daylilies |
| Maya Gardens, Inc. |
| Maynell Cottage Plants |
| MBT Nursery Sales (Miracle Bush Tomatoes) |
| McBean's Orchids |
| McClure & Zimmerman Quality Flowerbulb Brokers |
| McConnell's Plantland - Perche Creek Gardens |
| McCracken's Nursery |
| McCrory's Sunny Hill Nursery |
| McDonald's Aquatic Nurseries |
| McFadden & Hukill (Agri-Gold) |
| McGinnis Tree and Seed Company |
| McGlauflin's Perennials |
| McGregor Fence Company - Small Animal Control |
| McKay Nursery Company |
| McKenzie Farms Nursery |
| McLellan Botanicals |
| MCM Orchids |
| McRae's Hilltop Garden |
| Mea Nursery |
| Meadow View Farms |
| Meadowbrook Gardens |
| Meadowview Biological Research Station |
| Meads Daylily Gardens |
| Meanplants.com |
| MEAS (Mid East Agricultural Service) |
| Med Pest & Supply |
| Medicinal Herb Plants Nursery |
| Medwyn's of Anglesey |
| Meehan's Bonsai Tool and Supply |
| Meehan's Miniatures |
| Meert Tree Farms, Inc. |
| MegaGro |
| Meija Outdoors |
| Meke Aloha Orchids |
| Melissa's Seeds |
| MelloBonsai.com |
| Melva's Garden |
| Melvin Worley Nursery |
| Mendle Nursery |
| Mendocino Coast Bonsai |
| Mendocino Heirloom Roses |
| Mendocino Maples Nursery |
| Mentha Nurseries Ltd. |
| Mercers' Garden |
| Merebrook Pond Plants |
| Mericlone Labs |
| Meridian Gardens |
| Merkle's Orchids |
| Merle's Daylily Patch |
| Merlin's Watergardens |
| Merrifield Garden Center |
| Merrill's Poultry Compost |
| MerryGro Farms |
| Merrymeeting Daylilies |
| Merwine Farms & Nursery |
| Mesa Garden |
| Messelaar Bulb Co. |
| Messiah Bridgeworks |
| MetalGardenMarkers.com (division of Birddog Distributing, Inc.) |
| Methow Natives Nursery |
| Metzer Farms Duck and Goose Hatchery |
| Meyer Hatchery |
| Meyer Seed International, Inc. |
| MeyerLemonTree.com |
| MG Gardenfaerie |
| Michael Jay Beekeeping Supplies |
| Michael Schembs Hostas |
| Michael's Bromeliads |
| Michael's Nursery |
| Michele's Home & Garden |
| Michigan Bamboo Company |
| Michigan Bulb |
| Michigan Gardener Magazine |
| Michigan Native Butterfly Farm |
| Michigan Wildflower Farm |
| Michigander Pots |
| Mickfield Hostas |
| Mickfield Watergarden Centre |
| Micro Hydroponics |
| Micro Organics International (division of Houston Tropicare Inc.) |
| Mid Atlantic Bamboo |
| Mid Atlantic Natives (formerly Superior Nursery) |
| Mid City Nursery |
| Mid Produce Company |
| Mid-America Garden |
| Mid-Pacific Orchids |
| Midlothian, Inc. |
| Midnight Gardens Daylilies |
| Midwest Aquatics and Exotics |
| Midwest Cactus |
| Midwest Chileheads |
| Midwest Chili Peppers |
| Midwest Hostas |
| Midwest Hydroponic Supplies |
| Midwest Vineyard Supply, Inc. |
| MIgardener |
| Mighty Fine Gardens Inc. |
| Mike Park Books Limited |
| Mike the Gardener Enterprises (AveragePersonGardening.com) |
| Mike's Magic Moths (Michael Soroka) |
| Milaeger's Gardens |
| Miles' To Go |
| Milewide Nursery |
| Milk Ranch Specialty Potatoes, LLC |
| Millais Nurseries Rhododendrons |
| Millcraft Outdoor Furniture |
| Miller Nurseries |
| Miller's Tropicals of Texas |
| Millington Seed Co. |
| Mills Magic Rose Mix (Beaty Fertilizer Company) |
| Millstone Meadows Daylily Farm |
| Millstones |
| Milo Bali Adelaide Orchids |
| MiloSeeds |
| Milov's Miracle Fruit Hut |
| Mingione's Farm (feathersandfleece.com) |
| Mingus Dahlias |
| Mini Crape Myrtles |
| Mini Forests by Sky |
| Mini Greenhouse Kits |
| Miniatree.com |
| Miniature Bulbs - The Warren Estate |
| Miniature Gardening |
| Miniature Plant Kingdom |
| Minnie and Moon |
| Miranda Orchids |
| Mischel's Greenhouse, Ltd. |
| Misho Bonsai |
| Miss Becky's Lily Farm |
| Mission Hills Nursery |
| Mississippi GARDENER |
| Missouri Wildflowers Nursery |
| Mister Honeysuckle, ltd -The Honeysuckle Popper |
| Mister Landscaper Microsprinkler & Drip Irrigation |
| Mistkits.com |
| Mistletoe-Carter (formerly Carter Seeds) |
| Misty Acres Nursery |
| Misty Hill Farms |
| Misty Valley Farm |
| Mistydowns |
| Mitchie's Roses & More |
| Miyama Asian Maples |
| Mobilegro (mobilegro.com) |
| Modern Artisans |
| Mohawk Dahlia Gardens |
| MoistEarth (a division of HICorp) |
| Moldovan's Gardens |
| Mole Control Made Easy |
| MOMET Plus (JERMIC LLC) |
| Momi Greene |
| Momiji Nursery |
| Monarch Landing Nursery and Gardens |
| Monarch Seeds |
| Monarch Watch |
| Mondo Grass.com (mondograss.com) |
| Mondus Distinction |
| Monika Gottschalk (Engeltrumpetenrärïtaten) |
| Monroe Works |
| Montauk Daylily Garden |
| Montburg Gardens |
| Monterey Lawn and Garden Products, Inc. |
| Monticello Garden Shop: Twinleaf Catalog |
| Montoso Gardens |
| Montreal Plants (Cappadocia & Page Landscape Designers) |
| Monty's Joy Juice (Monty's Plant Food Co.) |
| Monty's Plant Food |
| Moo Doo (Vermont Natural Ag Products Inc.) |
| Mooarhill Farm & Greenhouse |
| Moon - Sun Cactus & Koi Gardens |
| Moon's Farm Daylilies |
| Moongate Nursery |
| Moonridge Farms |
| Moonshadow Gardens |
| Moonshine Designs Nursery |
| Moorbait.com |
| Moore Tree Farm, LLC |
| Moore Water Gardens |
| Moosa Valley Nursery |
| Moose Tubers |
| Morgan County Seeds |
| Moringa Farms Inc |
| Morning Glory Farm |
| Morning Glory Seed Company |
| Morning Sky Greenery |
| Morning Star Daylilies |
| Morningside Gardens |
| Morningsun Herb Farm |
| Morris Nursery |
| Morse Nursery |
| Morton's Horticultural Products, Inc. |
| Moscarillo's Garden Shoppe |
| Moss Acres |
| Mosser Lee |
| Mosswood Home and Garden |
| Mossy Oak Nativ Nurseries |
| Mostly Texas Natives Nursery |
| Motes Orchids |
| Mother Earth News |
| Motion Scarecrows Inc. |
| MOTUS Inc. |
| Mount Venus Nursery |
| Mountain Brook Primroses |
| Mountain Crest Gardens |
| Mountain Gardens |
| Mountain Mead Chirstmas Tree Farm |
| Mountain Meadow Seeds |
| Mountain Mist Nursery |
| Mountain Orchids |
| Mountain Rose Herbs |
| Mountain Star Farms |
| Mountain Top Farms |
| Mountain Valley Dahlia Company |
| Mountain Valley Garlic |
| Mountain Valley Growers |
| Mountain Valley Seed |
| Mountain Valley Seed, Inc. |
| Mountain View Daylily Gardens |
| Mountain View Iris Gardens |
| Mountaintop Gardens |
| MountainView Tropicals |
| Mow's Garden (Doris Mow) |
| Moyer's Chicks |
| Mr Fancy Plants Nursery |
| Mr Fothergill's Seeds and Bulbs |
| Mr Seeds |
| Mr Tomatohead (mrtomatohead.biz) |
| Mr. Drip |
| Mr. Fothergill's Seeds, Canada (TWD Lawn & Garden Products) |
| Mr. Fothergills' Seeds |
| Mr. G Tree and Nursery |
| Mr. Madan Tamang |
| Mr. Soaker Hose LLC |
| Mr. Wiggleworm's |
| MRC Seeds (formerly Harvext and Floragreen) |
| MrMaple (Nichol's Nursery) |
| Mrs. Strep Streps |
| Mt. Beenak Orchids |
| Mt. Healthy Hatcheries, Inc. |
| Mt. Mist Ornamental |
| Mt. Pleasant Iris Farm |
| MTBobbins Daylilies |
| Muck and Stuff |
| Muck Boots Online.com |
| Muck Boots Outlet |
| Muckyhands.com |
| MudArt (Jacobson Plastics, LLC) |
| Muddy Boots Mercantile |
| Muddy Waters Aquatic Nursery |
| Mudmom |
| Mulberry Woods Nursery |
| Muleshoe Metal Art (formerly Sandhill Metal Works) |
| Muller's Smart Carts |
| Mullet River Garlic Farm |
| Mulligan Seeds |
| Multiflora Enterprises |
| Mums By Paschke |
| Munchkin Nursery and Gardens, LLC |
| Muncy's Organics |
| Muncy's Rose Emporium |
| Murphy's Seed Potatoes |
| Murray McMurray Hatchery |
| Muscle and Arm Farm |
| Mushroom Adventures |
| Mushroom Mountain |
| Mushroompeople |
| Musser Forests, Inc. |
| My Amaryllis |
| My Carnivore |
| My Dad's Garlic |
| My Garden Colors |
| My Garden Gifts |
| My Garden Journal (Upper Shores Software) |
| My Green Obsession |
| My Growing Gardenbook (Cove Connections) |
| My Handy Tools Co., Ltd. |
| My Mother's Garden |
| My Patriot Supply Company |
| My Pet Chicken |
| My Plumeria Sticks |
| My Wild Iris Rows |
| Mybeebow.com |
| Myco Cultures |
| Myco Supply Company, Inc. |
| MycoBag.com |
| Mycoflor Inc. |
| MyCrobz |
| MyHeirloomseeds.com |
| Mypalmshop |
| MyPatriotSupply |
| Myreels.com |
| mySEASONS Garden Solutions |
| MySeeds.Co |
| MySeedz |
| MysteriousGarden.com |
| Mystic Meadows Daylily Farm |
