M
- Magic lily (Lycoris squamigera), 1
- Magnolia (magnolia), 1
- Magnolia grandiflora (Southern magnolia, bull bay), 1
- Magnolia × soulangiana (saucer magnolia), 1
- Magnolia stellata (star magnolia), 1
- Magnolia virginiana (sweet bay), 1
- Malus (crabapple), 1
- Malus floribunda (Japanese flowering crabapple), 1
- Malus hupehensis (tea crabapple), 1
- Malus pumila (edible apple), 1
- Malus sargentii (Sargent crabapple), 1
- Malus sieboldii (Toringo crabapple), 1
-
- Manure, 1, 2
- Maple (Acer), 1
- Amur (A. ginnala), 1, 2
- box elder (A. negundo), 1, 2
- Florida (A. barbatum), 1, 2
- full-moon (A. japonicum), 1, 2
- hard (A. saccharum), 1
- Japanese (A. palmatum), 1
- moosewood (A. pensylvanicum), 1
- Norway (A. platanoides), 1
- red (A. rubrum), 1
- rock (A. saccharum), 1
- silver (A. saccharinium), 1
- striped (A. pensylvanicum), 1
- sugar (A. saccharum), 1
- swamp (A. rubrum), 1
- trident (A. buergeranum), 1, 2
- Marigolds (Tagetes), 1, 2
- Master gardeners, 1
- Meadow gardens, 1, 2, 3
- caring for, 1
- getting started, 1
- plants for, 1, 2
- site preparation and sowing, 1
- Meadow saffron (autumn crocus) (Colchicum autumnale), 1
- Medicago sativa (alfalfa), 1
- Medlar, 1
- Melilotus officinalis (sweet clover), 1
- Melons, 1, 2
- bitter, 1
- cantaloupes, 1
- Chinese preserving (white gourd, winter melon, wax gourd), 1
- watermelons, 1
- winter melons, 1
- Mentha spp. (mints), 1
- Mertensia (bluebells), 1
- Mertensia virginica (Virginia bluebells), 1
- Mesclun mixes, 1
- Mexican bean beetle, 1
- Mice, 1
- Michaelmas daisy (Aster), 1
- Microgreens, 1
- Milky disease, 1
- Millet, 1
- Million bells (trailing petunia)(Calibrachoa), 1
- Mint (Mentha spp.), 1, 2
- Mites, 1, 2
- Mizuna (Japanese greens), 1, 2
- Molds, 1
- Moles, 1
- Monarda (bee balm), 1
- Monarda didyma (bee balm), 1
- Moonflower (Ipomoea alba), 1
- Morning glory (Ipomoea spp.), 1
- Moss, 1
- Moss rose (Portulaca), 1
- Mountain bluet (Centaurea montana), 1
- Mugwort, white (Artemisia lactiflora), 1
- Mulberry, 1
- Mulch, 1, 2, 3
- organic, 1, 2
- synthetic, 1, 2
- weeds and, 1, 2
- Mustard
- Mustard greens, 1
- Myrtle (Vinca minor), 1