Ash: caroliniana, Water Ash: croceocarpa, Mountain
Ash: hupehensis, Mountain Ash: intermedia, Mountain
Ash: keuensis, Mountain Ash: lancifolia, Mountain
Ash: mougeotii, Mountain Ash: multijuga, Mountain
Ash: pallescens, Mountain Ash: pohuashanensis, Mountain
Ash: scalaris, Mountain Ash: tamamschjanae, Mountain
Ash: velutina, Arizona Ash: zahlbruckneri, Mountain
Ashanti Blood Ashe Juniper
Ashe Magnolia 'Ashfordii' Common Juniper
Ashy Hydrangea (spp.) Ashy Hydrangea 'Annabelle'
Ashy Hydrangea 'Grandiflora' Ashy Hydrangea 'Incrediball®'
Ashy Hydrangea 'Invincibelle® Spirit' Ashy Hydrangea 'White Dome®'
Asian Bell Tree Asian Pear
Asian White Birch Asian White Birch: platyphylla
Asiatic Jasmine (spp.) Asiatic Jasmine Variegated
Aspen Weeping Aspen, Bigtooth
Aspen, Canadian Aspen, Quaking
Aspen: wilsonii 'Asplenifolia' Alder Buckthorn
'Asplenifolia' European Beech Ateje De Costa
'Atheline Wilbur' Lilac 'Athene' Magnolia
'Athens' Carolina Allspice Atlantic White Cedar (spp.)
Atlantic White Cedar 'Andelyensis' Atlantic White Cedar 'Conica'
Atlantic White Cedar 'Ericoides' Atlantic White Cedar 'Heatherbun'
'Atropurpurea' Cherry Plum 'Atropurpurea' Harry Lauder's Walking Stick
'Atropurpurea' Japanese Barberry 'Atropurpurea Nana' Japanese Barberry
'Atropurpureum' Japanese Maple 'Atropurpureum Ribbon Leaf' Japanese Maple
'Atropurpureum Superbum' Japanese Maple 'Atrovariegata Dissectum' Japanese Cutleaf Maple
'Attraction' Butterflybush Aucuba 'Rozannie'
Aucuba, Japanese (spp.) Aucuba, Japanese 'Gold Dust'
Aucuba, Japanese 'Mr. Goldstrike' Aucuba, Japanese 'Picturata'
Aucuba, Japanese Variegated Aucuba, Narrow Leaf Japanese
'Aucubifolia' Green Ash 'Augustine' American Elm
'Aurantiaca' Winterberry: verticillata 'Aurantiacum' Tea Viburnum
'Aurea Densa' Lawson's Cypress 'Aurea Pendula' Deodar Cedar
'Aureomarginata' Black Elderberry 'Aureo-marginata' Boxelder
'Aureopicta' Bush Ivy 'Aureo-reticulata' Japanese Honeysuckle
'Aureo-variegata' Alaska Cedar 'Aureo-variegata' California Incense Cedar
'Aureovitla' Japanese Kerria 'Aurescens' Japanese Yew: cuspidata
'Auresens' American Arborvitae 'Aurora' Koreanspice Viburnum
'Austraflora Fanfare' Spider Flower Australia Acacia
Australia Chestnut Australia Flame Pea
Australian Banyan Australian Beefwood
Australian Fig Australian Fuchsia
Australian Fuchsia: pulchella Australian Ivy Palm (spp.)
Australian Ivy Palm 'Amate™' Australian Laurel (spp.)
Australian Laurel 'Creme De Menthe' Australian Laurel 'Turners Dwarf'
Australian Laurel Variegated Australian Mintbush
Australian Nut 'Dr. Beaumont' Australian Palm
Australian Pine Australian Pine: glauca
Australian Pine: spp. Australian Rosemary (spp.)
Australian Rosemary 'Zena' Australian Saltbush
Australian Tea Tree (spp.) Australian Tea Tree 'Reevesii'
Australian Teak Australian Tree Fern
Australian Wattle Australian Willow
Austrian Briar Rose 'Bicolor' Austrian Pine (spp.)
Austrian Pine 'Globosa' Austrian Yellow Rose 'Bicolor'