'Niagara Falls' Hosta 'Nicky' Summer Phlox
'Nicodemus' Swedish Begonia: Plectranthus 'Nicolleta' Swedish Begonia: Plectranthus
Nicotiana (spp.) Nicotiana 'Avalon Bright Pink'
Nicotiana 'Havana Appleblossom' Nicotiana 'Nikki Lime'
Nicotiana 'Nikki Mix' Nicotiana 'Nikki Pink'
Nicotiana 'Nikki Rose' Nigella, Yellow
'Night Before Christmas' Hosta Night Blooming Cactus
Night Blooming Cactus: undatus Night Blooming Cereus
Night Blooming Hesperaloe 'Night Heron' Cantonese Fairy Bells
'Night Star' Carnation: Dianthus 'Night Watch' Hairy Alumroot
Nightshade, Black Nightshade, Climbing
Nightshade, Common Nightshade, Costa Rica
Nightshade, Poisonous Nightshade: dulcamara, Deadly
'Nigra' Levant Cotton 'Nikki Lime' Flowering Tobacco
'Nikki Mix' Flowering Tobacco 'Nikki Pink' Flowering Tobacco
'Nikki Rose' Flowering Tobacco Nile Cabbage
'Nile Crane' Daylily Nipple Cactus
Nipple Cactus: muehlenpfordtii Nipple Cactus: polythele
Nippon Daisy Nippon Lily
'Nippon' Maiden Grass 'Niveum' Young's Barrenwort
'Nob Hill' Daylily 'Nobility' Hosta
Nodding Lady's Tresses Nodding Onion
Nolana Nolina, Bigelow
'Nonstop® Apricot' Hybrid Tuberous Begonia 'Nonstop®' Hybrid Tuberous Begonia
'Nonstop® Rose Petticoat' Hybrid Tuberous Begonia 'Nonstop® Yellow' Hybrid Tuberous Begonia
'Nora Leigh' Summer Phlox 'Norland' Potato
North American Wild Oats Northern Blue Flag
'Northern Exposure' Hosta Northern Jacob's Ladder 'Heavenly Habit'
'Northern Lights' Hair Grass Northern Sea Oats
'Norwich Canary' Montbretia 'Nova' Foxtail Agave
'Nova' Spiral Ginger 'Novalis' Verbena
'Novella' Annual Mallow 'Noverna Purple' Sweet William
Nubian Aloe (spp.) Nubian Aloe Variegated
Nun's Cap Nun's Hooded Orchid
Nut Grass 'Nutmeg' Geranium: Pelargonium
Nutmeg Scented Geranium Nuts, Fox
Nutsedge, Yellow Oak Fern (spp.)
Oak Fern 'Plumosum' Oak Leaf Geranium
Oak Leaf Ivy (spp.) Oak Leaf Ivy 'Ellen Danica'
Oak Leaf Ivy 'Mandaiana' 'Oak Leaf' Velvet Leaf: beharensis
'Oakhurst' Pineapple Lily 'Oakington Blue Eyes' Moss Phlox
'Oakington Jewel' Alumroot: Heuchera 'Oakleaf' Heartleaf Foamflower
Oatgrass, Blue (spp.) Oatgrass, Blue 'Sapphire'
Oats, North American Wild Oats, Northern Sea
Oats, River Oats, Sea
Oats, Spanglegrass River Oats, Wild
Obedient Plant (spp.) Obedient Plant 'Miss Manners'
Obedient Plant 'Mordea Beauty' Obedient Plant 'Pink Bouquet'
Obedient Plant 'Red Beauty' Obedient Plant 'Summer Snow'
Obedient Plant Variegated Oblong Fern