Abelia floribunda AGM

Abelia 'Goldspot'

Abelia x grandiflora AGM

Acanthus 'Hollard's Gold'

Golden bear's breeches

Acanthus hungaricus

Bear's breeches

Acanthus spinosus

Bear's breeches

Acer negundo 'Flamingo'

Acer palmatum 'Atropurpureum'

Japanese maple

Achillea 'Cherry Queen'

Yarrow

Achillea 'Martina' AGM

Yarrow

Achillea millefolium 'Paprika'

Yarrow

Achillea 'Moonshine' AGM

Yarrow

Achillea ptarmica 'The Pearl Group'

Yarrow

Achillea 'Terracotta'

Yarrow

Achillea 'Walther Funcke'

Yarrow

Acinos alpinus

Alpine calamint

Aconitum 'Ivorine'

Monkshood

Aconitum 'Stainless Steel'

Monkshood

Aconitum x arendsii (carmichaelii 'Arendsii') AGM

Monkshood

Acorus gramineus 'Minigold'

Japanese sweet flag

Acorus gramineus 'Variegatus'

Japanese sweet flag

Acorus graminus 'Ogon'

Japanese sweet flag

Actaea cordifolia

Baneberry

Actaea matsumurae 'White Pearl'

(was Cimicifuga simplex 'White Pearl')

Actinidia deliciosa 'Boskoop'

Kiwi fruit, Chinese Gooseberry

Actinidia kolomikta

Adiantum pedatum AGM

Aegpodium podagraria 'Variegatum'

Agapanthus 'Blue Dot'

African blue lily

Agapanthus 'Lilliput'

African blue lily

Agapanthus 'Streamline'

African blue lily

Agapanthus 'Umbellatus Albus'

Agastache rugosum 'Golden Jubilee'

Ajuga reptans 'Arctic Fox'

Variegated bugle

Ajuga reptans 'Atropurpurea'

Bugle

Ajuga reptans 'Black Scallop'

Bugle

Ajuga reptans 'Catlin's Giant' AGM

Bugle

Ajuga reptans 'Chocolate Chip'

Bugle

Ajuga reptans 'Little Court Pink'

Bugle

Ajuga reptans 'Multicolor' (syn 'Rainbow')

Bugle

Alchemilla alpina

Lady's Mantle

Alchemilla erythropoda AGM

Dwarf Lady's Mantle

Alchemilla mollis AGM

Lady's Mantle

Alchemilla mollis AGM

Lady's Mantle

Alchemilla saxatilis

Lady's Mantle

Allium hollandicum 'Purple Sensation' AGM

Allium triquetrum

Alopecurus pratensis 'Aureovariegatus'

Althaea armenica

Ammi majus

Anacyclus pyrethrum var. depressus

Anaphalis triplinervis 'Summer Snow' AGM

Everlasting pearl

Anchusa azurea 'Loddon Royalist' AGM

Alkanet

Anemone hupehensis 'Hadspen Abundance' AGM

Anemone

Anemone hupehensis 'Prinz Heinrich' AGM

Anemone

Anemone hupehensis var. japonica 'Pamina' AGM

Japanese anemone

Anemone leveillei

Anemone multifida

Anemone multifida 'Rubra'

Anemone 'Queen Charlotte' (= 'Konigin Charlotte') AGM

Anemone ranunculoides AGM

Anemone tomentosa

Anemone x hybrida 'Honorine Jobert' AGM

Japanese anemone

Anemone x hybrida 'September Charm' AGM

Japanese anemone

Anemone x hybrida 'Whirlwind'

Japanese anemone

Anthemis 'Grallagh Gold'

Golden marguerite

Anthemis tinctoria 'E C Buxton'

Golden marguerite

Anthemis tinctoria 'Sauce Hollandaise'

Golden marguerite

Anthemis tinctoria 'Wargrave Variety'

Golden marguerite

Anthriscus 'Ravens Wing'

Black cow parsley

Aquilegia buergeriana 'Calimero'

Columbine

Aquilegia 'Cameo Mix'

Columbine

Aquilegia canadensis AGM

Canadian columbine

Aquilegia canadensis 'Little Lanterns'

Columbine

Aquilegia chrysantha 'Yellow Queen'

Columbine

Aquilegia formosa

Columbine

Aquilegia fragrans

Columbine

Aquilegia McKana hybrids

Columbine

Aquilegia viridiflora

Columbine

Aquilegia vulgaris 'Alba'

Columbine

Aquilegia vulgaris 'William Guinness'

Columbine

Aquilegia vulgaris 'Woodside Gold'

Columbine

Armeria 'Joystick Lilac Shades'

Sea thrift

Armeria maritima 'Alba'

Sea thrift

Armeria maritima 'Alba'

Sea thrift

Armeria maritima 'Splendens'

Sea thrift

Artemisia alba 'Canescens' AGM

Wormwood

Artemisia ludoviciana 'Valerie Finnis' AGM

Wormwood

Artemisia 'Powis Castle' AGM

Wormwood

Arum italicum

Lords and ladies

Aruncus aethusifolius

Dwarf goatsbeard

Aruncus dioicus AGM

Goatsbeard

Aruncus dioicus 'Kneiffii'

Goatsbeard

Asphodeline lutea

Jacob's rod

Asphodeline taurica

Jacob's rod

Asphodelus albus

Asphodel

Aster amellus 'King George' AGM

Michaelmas daisy

Aster amellus 'Veilchenkonigin' AGM

'Violet Queen' Michaelmas daisy

Aster diplotephiodes

Aster divaricatus

Aster lateriflorus 'Horizontalis' AGM

Michaelmas daisy

Aster