Perennials

Agapanthus 'Blue Giant'

Ajuga reptans

Ajuga reptans 'Multicolor'

Alchemilla mollis

Allium schoenoprasum

Alstroemeria aurea 'Hawera'

Anemone blanda

Anemone 'Dreaming Swan'

Anemone nemerosa

Anemone hupehensis var. japonica

Anemone rivularis

Anemone x hybrida 'Honorine Jobert'

Aquilegia atrata

Aquilegia vulgaris 'Adinis'

Arenaria montana

Astilbe chinensis var. pumila
Astilbe 'Medeia'

Astilbe x Arendsii 'Venus'

Astilbe simplicifolia 'Sprite'

Astilbe x Arendsii
'Snowdrift'
Astrantia major 'Venice'

Aubrieta deltoidea 'Blue Cascade'

Aubrieta deltoidea 'Purple Cascade'

Bergenia crassifolia

Caltha palustris

Camassia leichtlinii 'Caerula'

Campanula glomerata 'Superba'

Campanula poscharskyana

Campanula takesimana
Catananche caerulea

Cerastium tomentosum

Chrysanthemum 'Esther'
Chrysanthemum 'Melanie'
Clematis stans

Convallaria majalis

Coreopsis verticillata 'Zagreb'

Crocosmia luciferans

Crocosmia masoniorum

Crocosmia x crocosmiiflora

Cyclamen hedrifolium

Cymbalaria muralis

Dahlia 'Bishop of Llandaff'

Dahlia 'David Howard'

Dahlia 'Ice Crystal'

Dahlia 'Mignon G.F. Hemerik'

Dahlia 'Moonfire'

Delphinium 'Black Knight'

Delphinium x elatum 'Magic Fountain'

Dianthus deltoides 'Leuchtfunk'

Dianthus superbus

Dierama pulcherrimum

Erodium 'Bishop's Variety'

Erysimum 'Bowles Mauve'

Euphorbia griffithii 'Fireglow'

Foeniculum vulgare 'Purpureum'

Gaillardia × grandiflora 'Kobold'

Geranium 'Johnson's Blue'

Geranium macrorrhizum 'Bevan's Variety'

Geranium pratense 'Midnight Reiter'

Geranium sanguineum 'Max Frei'

Geranium x riversleaianum 'Hilary'

Geum chiloense 'Lady Stratheden'

Helleborus 'Double Anna White'

Helleborus niger

Helleborus orientalis 'Montsegur'

Helleborus orientalis 'Wilgenbroek Guttatus Pink'

Hemerocallis 'Bonanza'

Hemerocallis 'Crimson Pirate'

Hemerocallis 'Stella de Oro'

Hemerocallis fulva 'Cio Cio San'

Hemerocallis x hybrid 'Red'

Heuchera 'Plum Pudding'

Heuchera 'September Morn'

Heuchera 'Sunrise'

Heuchera micrantha 'Purple Palace'

Houttuynia cordata 'Chamaeleon'

Hyacinthoides non-scripta

Hylotelephium 'Herbstfreude'

Hypericum 'Elite Amber'

Iris hollandica 'Sapphire Beauty'

Iris pseudacorus

Iris reculata 'Clairette'

Kirengeshoma palmatum

Lamprocapnos spectabilis

Lamprocapnos spectabilis f. alba

Liatris spicata

Ligularia dentata 'Desdemona'

Lilium 'Rialto'

Limonium latifolium

Lithodora diffusa 'Heavenly Blue'

Lobelia 'Queen Victoria'

Lysimachia nummularia 'Aurea'

Meconopsis grandis

Monarda 'Cambridge Scarlet'

Muscari botryoides

Narcissus 'Tete-a-Tete'

Oenothera speciosa 'Evening Pink'

Origanum laevigatum 'Herrenhausen'

Origanum majorana

Origanum vulgare 'Aureum'

Paeonia lactiflora 'Sarah Bernhardt'

Paeonia lactiflora 'Karl Rosenfield'

Papaver orientale 'Allegro'

Papaver orientale 'Patty's Plum'

Papaver orientale 'Perry's White'

Phlox subulata 'Kimono'

Phlox subulata 'Rosea'

Potentilla agyrophylla var. Atrosanguinea 'Gibson's Scarlet'

Potentilla 'Gloire de Nancy'

Primula japonica 'Alba'

Primula vulgaris

Primula vulgaris 'Dylan & Thomas'

Rudbeckia fulgida 'Little Goldstar'

Salvia nemerosa 'Ostfriesland'

Saponaria ocymoides

Saxifraga fortunei

Scabiosa columbaria 'Butterfly Blue'

Scabiosa columbaria 'Pink Mist'

Silene uniflora 'Druett's Variegated'

Symphyotrichum lateriflorus 'Prince'

Thalictrum delavayi 'Hewitt's Double'

Tulbaghia violacea

Verbena bonariensis

Veronica umbrosa 'Georgia Blue'

Vinca minor 'Azurea Flore Pleno'

Viola 'Etain'

Viola riviniana

Viola riviniana 'Purpurea'

Catananche caerulea