Noms scientifiques : N
- Nandina domestica
- Nandina domestica 'Fire Power'
- Nandina domestica 'Obsessed'
- Napoleonaea vogelii
- Narcissus Bridal Crown
- Narcissus Cloud Nine
- Narcissus Ice Follies
- Narcissus Minnow
- Narcissus Pinza
- Narcissus Royal Gold
- Narcissus assoanus
- Narcissus cyclamineus
- Narcissus cyclamineus 'Peeping Tom'
- Narcissus cyclamineus 'Tête à Tête'
- Narcissus poeticus
- Narcissus poeticus 'Actaea'
- Narcissus poeticus var. recurvus
- Narcissus pseudonarcissus
- Narcissus triandrus 'Hawara'
- Narcissus triandrus 'Thalia'
- Nardus stricta
- Nassella tenuissima
- Nassella tenuissima 'Ponytails'
- Nautilocalyx melittifolius
- Nectaroscordum siculum subsp. bulgaricum
- Neillia longiracemosa
- Neillia thibetica
- Nelumbo nucifera
- Nemesia Angelart
- Nemesia Angelart Fruit Punch
- Nemesia Dark Blue
- Nemesia Impressario Pink
- Nemesia Karoo Blue
- Nemesia Karoo Dark Blue
- Nemesia Karoo Pink
- Nemesia Karoo Pink Improved
- Nemesia Karoo Plum
- Nemesia Magma Flame Pink
- Nemesia Nuvo Carmine
- Nemesia Nuvo Rose
- Nemesia Sunsatia Black Berry
- Nemesia Sunsatia Coconut
- Nemesia Sunsatia Mango
- Nemesia Sunsatia Saffron
- Nemesia cheiranthus
- Nemophila maculata
- Neochilenia occulta
- Neodypsis decaryi
- Neoregelia carolinae
- Neoregelia carolinae 'Tricolor'
- Neoregelia compacta
- Neoregelia concentrica
- Neoregelia marmorata
- Neoregelia pineliana
- Neoregelia princeps
- Neottia ovata
- Nepenthes Mizuho Kondo
- Nepenthes alata
- Nepenthes boisiense
- Nepenthes formosa
- Nepenthes formosa x smilesii
- Nepenthes hookeriana
- Nepenthes mirabilis
- Nepenthes x coccinea
- Nepeta cataria
- Nepeta grandiflora 'Bramdean'
- Nepeta grandiflora 'Wild Cat'
- Nepeta kubanica
- Nepeta prattii
- Nepeta racemosa
- Nepeta racemosa 'Superba'
- Nepeta sibirica
- Nepeta x faassenii
- Nepeta x fasssenii 'Kit Cat'
- Nepeta x fasssenii 'Purrsian Blue'
- Nepeta x fasssenii 'Walkers Low'
- Nephelium lappaceum
- Neptunia plena
- Nerine bowdenii
- Nerine bowdenii 'Alba'
- Nerium oleander
- Nicandra physalodes
- Nicandra physalodes var. violacea
- Nicotiana glauca
- Nicotiana rustica
- Nicotiana sylvestris
- Nicotiana tabacum
- Nicotiana x sanderae
- Nicotiana x sanderae 'Deep Lilac'
- Nidularium billbergioides
- Nidularium innocentii var. lineatum
- Nidularium terminale
- Nigella arvensis
- Nigella damascena
- Nigella damascena 'Miss Jekyll'
- Nigella sativa
- Noccaea caerulescens
- Nonea lutea
- Nothofagus antarctica
- Nothofagus cunninghamii
- Notobasis syriaca
- Notocactus magnificus
- Notocactus warasii
- Nuphar lutea
- Nymphaea Albert Greenberg
- Nymphaea Bagdad
- Nymphaea Mrs. George C. Hitchcock
- Nymphaea alba
- Nymphaea colorata
- Nymphaea gigantea
- Nymphaea lotus
- Nymphaea micrantha
- Nymphaea nouchali
- Nymphaea nouchali var. caerulea
- Nymphaea odorata
- Nymphaea rubra
- Nymphaea stellata
- Nymphaea stellata var. caerulea
- Nymphaea x daubenyana
- Nymphoides ezannoi
- Nymphoides peltata
- Nyssa sinensis 'Jim Russell'
- Nyssa sylvatica
- Nyssa sylvatica 'Wildfire'