• AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Blackstem Plants

  • Acanthus mollis
  • Achillea filipendulina 'Cloth of Gold'
  • Achillea millefolium 'Cassis'
  • Achillea ptarmica The Pearl Group seed-raised (d)
  • Achlys triphylla
  • Aconitum napellus subsp. vulgare 'Albidum'
  • Aconitum seoulense
  • Aconitum uchiyamae
  • Aconitum 'Newry Blue'
  • Adenophora bulleyana
  • Aeonium tabuliforme
  • Aeonium 'Zwartkop'
  • Agapanthus Headbourne hybrids
  • Agastache rugosa f. albiflora 'Liquorice White'
  • Agastache rugosa 'Golden Jubilee'
  • Agastache rugosa 'Liquorice Blue'
  • Agastache 'Tango'
  • Ageratina altissima 'Chocolate'
  • Alchemilla mollis
  • Aloe aristata
  • Althaea cannabina
  • Amorpha canescens
  • Amsonia hubrichtii
  • Amsonia illustris
  • Amsonia tabernaemontana
  • Anaphalis margaritacea 'Neuschnee'
  • Anaphalis triplinervis
  • Anemanthele lessoniana
  • Anemone rivularis 'Glacier'
  • Aquilegia canadensis
  • Aquilegia canadensis 'Corbett'
  • Aquilegia viridiflora 'Chocolate Soldier'
  • Aquilegia vulgaris var. stellata 'Black Barlow' (Barlow Series) (d)
  • Aquilegia vulgaris var. stellata 'Nora Barlow' (Barlow Series) (d)
  • Aquilegia vulgaris var. stellata 'Ruby Port' (d)
  • Aquilegia vulgaris 'William Guiness'
  • Aquilegia 'Blue Star' (Star Series)
  • Aquilegia 'Koralle'
  • Aquilegia 'Leprechaun Gold' (v)
  • Aquilegia 'Roundway Chocolate'
  • Aralia racemosa
  • Artemisia lactiflora
  • Artemisia ludoviciana
  • Aruncus aethusifolius
  • Aruncus dioicus 'Zweiweltenkind'
  • Asclepias incarnata 'Soulmate'
  • Asclepias speciosa
  • Asclepias tuberosa subsp. interior
  • Asphodeline lutea 'Gelbkerze'
  • Asphodelus albus
  • Astilbe × rosea 'Peach Blossom'
  • Astilboides tabularis
  • Astrantia major
  • Astrantia major 'Primadonna'
  • Astrantia major 'Rosensinfonie'
  • Astrantia maxima
  • Baptisia alba
  • Baptisia australis 'Caspian Blue'
  • Bergenia cordifolia 'Vinterglöd'
  • Berkheya purpurea
  • Bidens aurea 'Lemon Queen'
  • Bouteloua gracilis
  • Briza media
  • Butomus umbellatus
  • Calamagrostis brachytricha
  • Calamagrostis emodensis
  • Calamagrostis × acutiflora 'Karl Foerster'
  • Camassia quamash
  • Campanula glomerata 'Superba'
  • Campanula latifolia 'Amethyst'
  • Campanula pendula
  • Campanula punctata f. rubriflora
  • Campanula takesimana 'Bellringers'
  • Campanula thyrsoides
  • Carex elata 'Aurea'
  • Carex grayi
  • Carex testacea 'Prairie Fire'
  • Centaurea atropurpurea
  • Centaurea macrocephala
  • Cephalaria gigantea
  • Ceratostigma plumbaginoides
  • Chaenorhinum origanifolium 'Blue Dream'
  • Chasmanthium latifolium 'Little Tickler'
  • Chelone glabra
  • Chelone lyonii 'Pink Temptation'
  • Chionochloa rubra subsp. cuprea
  • Cirsium japonicum 'Pink Beauty'
  • Clematis heracleifolia
  • Clematis integrifolia 'Blue Ribbons' (I)
  • Coreopsis grandiflora
  • Coreopsis grandiflora 'Sunfire'
  • Cortaderia selloana 'Rosea'
  • Cosmos atrosanguineus 'Black Magic'
  • Crocosmia × crocosmiiflora 'Emily McKenzie'
  • Crocosmia × crocosmiiflora 'Sunglow'
  • Darmera peltata
  • Datisca cannabina
  • Delphinium elatum 'Sweethearts' (New Millennium Series)
  • Delphinium 'Black-eyed Angels' (New Millennium Series)
  • Delphinium 'Purple Passion' (New Millennium Series)
  • Deschampsia cespitosa 'Pixie Fountain'
  • Desmodium canadense
  • Dianthus arenarius
  • Dianthus arenarius 'Little Maiden' (p)
  • Dianthus carthusianorum
  • Dianthus cruentus
  • Dianthus deltoides 'Arctic Fire' (p)
  • Dianthus plumarius
  • Dianthus 'Dancing Geisha'
  • Dierama pulcherrimum
  • Digitalis ferruginea 'Gelber Herold'
  • Digitalis parviflora 'Milk Chocolate'
  • Digitalis × mertonensis 'Summer King'
  • Dracocephalum rupestre
  • Echinacea purpurea 'Happy Star'
  • Echinacea purpurea 'Mellow Yellows'
  • Echinacea purpurea 'Pink Parasol'
  • Echinacea purpurea 'Rubinstern'
  • Echinacea purpurea 'White Swan'
  • Echinops bannaticus 'Blue Glow'
  • Echinops bannaticus 'Star Frost'
  • Echinops ritro L.
  • Echinops sphaerocephalus 'Arctic Glow'
  • Echium fastuosum
  • Echium russicum
  • Echium wildpretii
  • Elymus magellanicus
  • Equisetum hyemale
  • Eragrostis spectabilis
  • Erigeron karvinskianus 'Stallone'
  • Eriophorum angustifolium
  • Eryngium agavifolium
  • Eryngium giganteum 'Silver Ghost'
  • Eryngium pandanifolium
  • Eryngium planum
  • Eryngium variifolium 'Miss Marble'
  • Eucomis comosa
  • Eupatorium fistulosum f. albidum 'Ivory Towers'
  • Eupatorium maculatum Atropurpureum Group
  • Euphorbia characias subsp. wulfenii
  • Euphorbia cyparissias 'Fens Ruby'
  • Euphorbia griffithii 'Dixter'
  • Euphorbia mellifera
  • Euphorbia myrsinites
  • Ficus carica 'Brown Turkey' (F)
  • Gaillardia × grandiflora 'Burgunder'
  • Gaillardia × grandiflora 'Tokajer'
  • Galega officinalis 'Alba'
  • Galtonia candicans
  • Gentiana andrewsii
  • Gentiana asclepiadea
  • Gentiana cruciata
  • Geranium pratense (Victor Reiter Group) 'Midnight Reiter'
  • Geranium pratense 'Striatum'
  • Geum 'Blazing Sunset' (d)
  • Geum 'Lady Stratheden' (d)
  • Geum 'Mrs J. Bradshaw' (d)
  • Gillenia trifoliata
  • Haloragis erecta 'Wellington Bronze'
  • Helenium autumnale Helena Series
  • Helianthus maximiliani
  • Heliopsis helianthoides var. scabra 'Bleeding Hearts'
  • Hemiboea subcapitata
  • Heracleum sphondylium pink-flowered
  • Hesperantha coccinea 'Wilfred H. Bryant'
  • Heuchera americana Dale's strain
  • Heuchera 'Leuchtkäfer'
  • Heuchera 'Melting Fire'
  • Hierochloe odorata
  • Houttuynia cordata 'Flore Pleno' (d)
  • Hylotelephium telephium Emperor's Waves Group
  • Hylotelephium (Herbstfreude Group) 'Herbstfreude'
  • Hyssopus officinalis f. albus
  • Hystrix patula
  • Inula hookeri
  • Iris chrysographes black-flowered
  • Iris sibirica
  • Iris spuria
  • Iris versicolor 'Kermesina'
  • Iris × norrisii Kiba Giants (mixed)
  • Iris 'Beverly Sills' (TB)
  • Iris 'Black Gamecock' (La)
  • Iris 'Night Owl' (TB)
  • Juncus effusus f. spiralis
  • Kirengeshoma palmata
  • Kitaibela vitifolia
  • Klasea bulgarica
  • Knautia macedonica
  • Knautia macedonica Melton pastels
  • Kniphofia rooperi
  • Kniphofia uvaria
  • Leibnitzia anandria
  • Leonurus cardiaca 'Grobbebol'
  • Leptinella squalida 'Platt's Black'
  • Leucanthemum × superbum 'Brightside'
  • Leucosceptrum japonicum 'Golden Angel'
  • Liatris microcephala
  • Liatris scariosa 'White Spire'
  • Liatris spicata 'Floristan Violett'
  • Liatris spicata 'Floristan Weiss'
  • Liatris spicata 'Kobold'
  • Libertia chilensis
  • Libertia ixioides 'Goldfinger' (v)
  • Ligularia dentata 'Desdemona'
  • Ligularia dentata 'Midnight Lady'
  • Lilium formosanum var. pricei f. album
  • Lilium philippinense (IXa-b/a)
  • Linaria purpurea 'Canon Went'
  • Linum lewisii
  • Lobelia cardinalis 'Queen Victoria'
  • Lobelia siphilitica
  • Lobelia siphilitica f. albiflora 'Alba'
  • Lobelia tupa
  • Lobelia × speciosa 'Starship Deep Rose' (Starship Series)
  • Lobelia × speciosa 'Starship Scarlet' (Starship Series)
  • Lobelia × speciosa 'Tania'
  • Lupinus arboreus
  • Lupinus Band of Nobles Series
  • Lychnis chalcedonica
  • Lychnis chalcedonica 'Carnea'
  • Lychnis coronaria 'Alba'
  • Lychnis coronaria Oculata Group
  • Lychnis × arkwrightii 'Vesuvius'
  • Lysimachia ciliata 'Firecracker'
  • Lysimachia clethroides 'Lady Jane'
  • Lysimachia ephemerum
  • Lysimachia punctata L.
  • Macleaya microcarpa 'Kelway's Coral Plume'
  • Maianthemum racemosum
  • Melianthus comosus
  • Melianthus major
  • Melica altissima 'Atropurpurea'
  • Michauxia campanuloides
  • Miscanthus nepalensis
  • Miscanthus oligostachyus
  • Miscanthus sacchariflorus (Maxim.) Hack.
  • Miscanthus sinensis 'Dronning Ingrid'
  • Miscanthus sinensis 'Ferner Osten'
  • Miscanthus sinensis var. condensatus 'Cabaret' (v)
  • Monarda 'Prärienacht'
  • Morina longifolia
  • Muhlenbergia reverchonii Undaunted = 'Pund01s'
  • Nepeta govaniana
  • Oxalis triangularis Burgundy Wine = 'JR Oxburwi' (Xalis Series)
  • Paeonia ludlowii (S)
  • Panicum virgatum 'Emerald Chief'
  • Panicum virgatum 'Warrior'
  • Papaver (Oriental Group) 'Beauty of Livermere'
  • Papaver (Oriental Group) 'Royal Wedding'
  • Patrinia scabiosifolia
  • Peltoboykinia watanabei
  • Pennisetum alopecuroides f. viridescens
  • Pennisetum alopecuroides 'Hameln'
  • Pennisetum macrourum 'Tail Feathers'
  • Pennisetum thunbergii 'Red Buttons'
  • Pennisetum villosum 'Cream Falls'
  • Penstemon barbatus 'Jingle Bells'
  • Penstemon digitalis 'Husker Red'
  • Penstemon whippleanus 'Chocolate Drop'
  • Petrorhagia saxifraga
  • Phlomis russeliana
  • Phlomis tuberosa 'Bronze Flamingo'
  • Phuopsis stylosa
  • Physalis alkekengi
  • Physostegia virginiana 'Rose Queen'
  • Physostegia virginiana 'Summer Snow'
  • Platycodon grandiflorus 'Fuji Blue'
  • Poa cita
  • Polemonium yezoense var. hidakanum 'Purple Rain'
  • Potentilla atrosanguinea var. argyrophylla 'Orange Starlit'
  • Potentilla nepalensis 'Miss Willmott'
  • Potentilla thurberi 'Monarch's Velvet'
  • Primula florindae Keillour hybrids (Si)
  • Primula vialii (So)
  • Proboscidea louisianica
  • Pulmonaria longifolia
  • Rehmannia elata
  • Reineckea carnea
  • Rheum alexandrae
  • Rheum palmatum var. tanguticum
  • Ricinus communis 'New Zealand Black'
  • Rodgersia new hybrids
  • Rudbeckia fulgida var. sullivantii 'Goldsturm'
  • Rudbeckia laciniata 'Herbstsonne'
  • Rudbeckia occidentalis 'Green Wizard'
  • Saccharum ravennae
  • Salvia jamensis pink-flowered
  • Salvia moorcroftiana
  • Salvia nemorosa 'Violet Queen'
  • Salvia patens 'Blue Angel'
  • Salvia pratensis 'Rose Rhapsody' (Ballet Series)
  • Salvia pratensis 'Swan Lake' (Ballet Series)
  • Salvia pratensis 'Twilight Serenade' (Ballet Series)
  • Salvia uliginosa
  • Salvia yangii 'Blue Steel' (Pe)
  • Salvia × sylvestris 'Blaukönigin'
  • Sanguisorba menziesii
  • Sanguisorba tenuifolia var. alba
  • Saponaria ocymoides
  • Saruma henryi
  • Scabiosa atropurpurea 'Beaujolais Bonnets'
  • Scabiosa columbaria 'Misty Butterflies'
  • Schizachyrium scoparium
  • Schizachyrium scoparium 'Blaze'
  • Schizachyrium scoparium 'Camper'
  • Schizachyrium scoparium 'Prairie Blues'
  • Scopolia carniolica
  • Senna hebecarpa
  • Setaria palmifolia
  • Sida hermaphrodita
  • Sideritis syriaca
  • Silene schafta
  • Silphium perfoliatum
  • Sorghastrum nutans
  • Spiranthes odorata 'Chadd's Ford'
  • Sporobolus heterolepis 'Wisconsin Strain'
  • Sporobolus wrightii
  • Stachys byzantina 'Pure Cotton'
  • Stipa calamagrostis
  • Stipa gigantea
  • Stipa lessingiana
  • Succisella inflexa 'Frosted Pearls'
  • Tanacetum niveum 'Jackpot'
  • Telekia speciosa
  • Tellima grandiflora
  • Thalictrum aquilegiifolium
  • Thalictrum delavayi
  • Thalictrum rochebruneanum
  • Thermopsis chinensis
  • Tiarella wherryi
  • Tragopogon porrifolius
  • Tricyrtis hirta
  • Tricyrtis macrantha subsp. macranthopsis
  • Trifolium ochroleucon
  • Trifolium rubens 'Frosty Feathers'
  • Trifolium rubens 'Red Feathers'
  • Trollius chinensis 'Golden Queen'
  • Trollius × cultorum 'New Moon'
  • Tulbaghia violacea 'John Rider'
  • Verbascum chaixii 'Wedding Candles'
  • Verbascum phoeniceum 'Violetta'
  • Verbena bonariensis
  • Verbena hastata f. rosea
  • Verbena hastata 'White Spires'
  • Verbena officinalis var. grandiflora 'Bampton'
  • Verbena rigida
  • Vernonia noveboracensis
  • Veronica longifolia blue-flowered
  • Veronica longifolia pink-flowered
  • Veronicastrum virginicum 'Album'
  • Zantedeschia aethiopica 'Crowborough'
  • Zigadenus elegans
  • Zingiber mioga

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