Alder, Beach Alder, White
Alder, Yellow (spp.) Alder: acuminata, White
Alder: verticillata, Black (spp.) Alder: verticillata, Black 'Afterglow'
Alder: verticillata, Black 'Aurantiaca' Alder: verticillata, Black 'Berry Heavy® Gold'
Alder: verticillata, Black 'Berry Poppins™' Alder: verticillata, Black 'Cacapon'
Alder: verticillata, Black 'Chrysocarpa' Alder: verticillata, Black 'Fairfax'
Alder: verticillata, Black 'Jolly Red' Alder: verticillata, Black 'Little Goblin™'
Alder: verticillata, Black 'Scarlett O'Hara' Alder: verticillata, Black 'Shaver'
Alder: verticillata, Black 'Sunsplash' Alder: verticillata, Black 'Winter Gold'
Alder: verticillata, Black 'Winter Red' 'Alert' New England Aster
'Alfredo' American Cranberrybush Viburnum 'Alice' Oakleaf Hydrangea
'All Seasons' Sugar Hackberry Alleghany Pachysandra
Alleghany, Spurge Allegheny Monkey Flower
Allegheny Serviceberry (spp.) Allegheny Serviceberry 'Lancifolia'
Alligator Apple Alligator Juniper 'Davis Mt. Weeping'
Alligator Juniper 'Mcfetter' 'Allison' Oakleaf Hydrangea
Allspice, Californian Allspice, Carolina (spp.)
Allspice, Carolina 'Athens' 'Alma Potschke' New England Aster
Almond, Desert Aloe
Aloe Yucca (spp.) Aloe Yucca 'Marginata'
Aloe Yucca Variegated Aloe, American (spp.)
Aloe, American 'Medio' Aloe, American Variegated
Aloe, American Variegated Aloe, Barbados
Aloe, Jackal's Tail Aloe, Kralalwyn
Aloe, Medicinal Aloe, Reitz's
'Alpina' Creeping Juniper Alpine Columbine
Alpine Fir 'Compacta' Alpine Fir: lasiocarpa
Alpine Violet: labradorica 'Alta®' Southern Magnolia
Alternate Leaf Dogwood (spp.) Alternate Leaf Dogwood 'Argentea'
'Altius™' Southern Magnolia Alum Root, False (spp.)
Alum Root, False 'Rubra' Alum Root, Hairy (spp.)
Alum Root, Hairy 'Night Watch' Alumroot (spp.)
Alumroot 'Ruby Veil' Alumroot, Giant (spp.)
Alumroot, Giant 'Night Watch' Alumroot, Hairy (spp.)
Alumroot, Hairy 'Night Watch' Alumroot: americana
Alumroot: Heuchera 'Santa Ana Cardinal' Alumroot: micrantha 'Palace Purple'
Alumroot: micrantha 'Pewter Moon' Alumroot: micrantha 'Raspberry Regal'
Alumroot: micrantha 'Ruffles' Alumroot: pulchella
Alumroot: sanguinea (spp.) Alumroot: sanguinea 'June Bride'
Alumroot: sanguinea 'Silver Veil' Alumroot: sanguinea 'Sioux Falls'
Alumroot: sanguinea 'Splendens' Alumroot: sanguinea 'Stormy Seas'
Alumroot: sanguinea 'Windfield Pink' Amaranth (spp.)
Amaranth 'Golden Giant' Amaranth: hybrid 'Intensa Pink'
Amaranth: hypochondriacus 'Pygmy Torch' Amaranthus 'Intensa Pink'
'Amate™' Octopus Tree