Arabis blepharophylla 'Spring Charm' Arabis caucasica
Arabis caucasica 'Snowcap' Arabis caucasica 'Variegata'
Arabis ferdinandi-coburgi 'Old Gold' Arabis ferdinandi-coburgi 'Variegata'
Arabis sturii Arabis sturii 'Skyrocket'
Arachis hypogaea 'Jumbo VA' Aralia cordata 'Sun King'
Arctotheca calendula Arctotis acaulis
Arctotis x hybrida Arctotis x hybrida 'Sunset Gold'
Arctotis venusta Arenaria montana
Arenaria tmolea Argemone grandiflora
Argemone mexicana Argemone mexicana 'Alba'
Argemone mexicana var. ochroleuca Argyranthemum 'Sunlite'
Argyranthemum foeniculaceum Argyranthemum foeniculaceum 'Jamaican Primrose'
Argyranthemum frutescens Argyranthemum frutescens 'Argymip (Molimba® Pink)'
Argyranthemum frutescens 'Vanilla Butterfly®' Argyranthemum x hybrida 'Comet White'
Argyranthemum vera Argyreia nervosa
Arisaema ringens Arisaema sikokianum
Arisaema triphyllum Aristea ecklonii
Aristolochia chilensis Aristolochia gigantea
Aristolochia macrophylla Armeria 'Apple Blossom'
Armeria 'Dusseldorf Pride' Armeria 'Juncea'
Armeria 'Victor Reiter' Armeria girardii
Armeria leucocephala 'Corsica' Armeria maritima
Armeria maritima 'Bloodstone' Armeria maritima 'Cotton Tail'
Armeria maritima 'Pink Lusitanica' Armeria maritima 'Rubrifolia'
Armeria maritima 'Sea Thrift' Armeria maritima 'Splendens'
Armeria pseudarmeria 'Joystick Lilac' Armeria pseudarmeria 'Joystick Red'
Armoracia rusticanna 'Variegata' Arnica chamissonis
Arrhenatherum elatius 'Variegatum' Arrhenatherum elatius ssp. bulbosum
Arrojadoa rhodantha Artemisia x 'Huntington'
Artemisia absinthium Artemisia absinthium 'Lambrook Silver'
Artemisia alba Artemisia arborescens 'Powis Castle'
Artemisia austriaca Artemisia dracunculus 'Sativa'
Artemisia lactiflora Artemisia lactiflora 'Guizhou'
Artemisia ludoviciana Artemisia ludoviciana 'Silver King'
Artemisia ludoviciana 'Silver Queen' Artemisia ludoviciana 'Valerie Finnis'
Artemisia nesiotica Artemisia pycnocephala
Artemisia pycnocephala 'David's Choice' Artemisia schmidtiana
Artemisia schmidtiana 'Silver Mound' Artemisia stelleriana
Artemisia stelleriana 'Silver Brocade' Artemisia vulgaris
Artemisia vulgaris 'Oriental Limelight' Arum italicum
Arum italicum 'Pictum' Aruncus aethusifolius
Aruncus dioicus Aruncus dioicus 'Kneiffii'
Aruncus dioicus 'Sylvester' Arundo donax
Arundo donax 'Picta' Arundo donax 'Variegata'
Asarina scandens Asarina scandens 'Jewels'
Asarum canadense Asarum caudatum
Asarum europaeum Asarum hexalobum var. perfectum
Asarum maximum 'Ling Ling' Asarum megacalyx
Asarum minor 'Dixie Darling' Asarum nipponicum
Asarum shuttleworthii