'Alva' Peacock Ginger Alyssum, Sweet (spp.)
Alyssum, Sweet 'Aphrodite' Alyssum, Sweet 'Apricot Shades'
Alyssum, Sweet 'Easter Bonnett' Amaranth (spp.)
Amaranth 'Golden Giant' Amaranth, False Globe 'Party Time'
Amaranth, False Globe 'Rubiginosa' Amaranth, False Globe 'Ruby'
Amaranth, Globe (spp.) Amaranth, Globe 'Gnome Pink'
Amaranth: erythoflexosa Amaranth: hybrid 'Aurora Summer Poinsettia'
Amaranth: hybrid 'Intensa Pink' Amaranth: hybrid 'Perfecta'
Amaranth: hybrid 'Ritz Rocket' Amaranth: hybrid 'Towers Mix'
Amaranth: hypochondriacus (spp.) Amaranth: hypochondriacus 'Pygmy Torch'
Amaranthus 'Aurora Summer Poinsettia' Amaranthus 'Intensa Pink'
Amaranthus 'Perfecta' Amaranthus 'Ritz Rocket'
Amaranthus 'Towers Mix' Amaranthus, Slender (spp.)
Amaranthus, Slender 'Viridis' Amaranthus: erythoflexosa
'Amargcus Dictamnus' Hop Marjoram Amaryllis (spp.)
Amaryllis, Butterfly Amaryllis, Double
Amaryllis, Hardy Amaryllis: Hippeastrum 'Ruby Meyer'
Amaryllis: Hippeastrum 'Safari' Amauropelta
Amazon Blue Amazon Elephant's Ear (spp.)
Amazon Lily 'Amazon Red' Flax
'Ambassador' Garden Canna 'Amber Maiden' Hosta
'Amber Moon' Japanese Tree Peony 'Amber Tiara' Hosta
'Amber Waves' Alumroot: Heuchera 'America' Asiatic Lily
American Aloe (spp.) American Aloe 'Medio'
American Aloe Variegated American Aloe Variegated
American Aloe 'White Striped' American Barrenwort
American Boneset 'American Dream' Pink Threadleaf Coreopsis
American Germander American Lotus
American Maidenhair Fern (spp.) American Mandrake
American Marigold (spp.) American Marigold 'Cortee Yellow'
American Marigold 'French Vanilla' American Marigold 'Inca II'
American Marigold 'Snowdrift' American Turk's Cap Lily
American Vetch American Waterlily (spp.)
American Waterlily 'Sulphurea Grandiflora' American Waterwillow
American Wormwood Amethyst Flower 'Blue Troll'
Amethyst Flower 'Major' 'Amethyst Myst' Alumroot: Heuchera
'Amethystina' Formosa Toad Lily Amole
Amsonia, Willow (spp.) Anacheilium, The Lines Petal
Anceps Bamboo Anderson's Holly Fern
'Andreana' Waterlily Andropogon Grass