Ramonda myconi

Rehmannia elata

Chinese foxglove

Rheum 'Ace of Hearts'

Chinese rhubarb

Rheum palmatum 'Atrosanguineum' AGM

Chinese rhubarb

Rhodochiton atrosanguineus

Purple bell vine

Ribes sanguineum 'Red Pimpernel'

Flowering currant

Ribes speciosum AGM

Fuchsia-flowered gooseberry

Rosa 'Compassion' AGM

Climbing rose

Rosa 'Golden Showers' AGM

Climbing rose

Rosa 'Grandpa Dickson'

Traditional hybrid tea bush rose

Rosa 'Iceberg Climber' AGM

Climbing rose

Rosa 'Margaret Merril' AGM

Traditional floribunda bush rose

Rosa 'Mountbatten' AGM

Modern floribunda bush rose

Rosa 'Penny Lane' AGM

Climbing rose

Rosa 'Royal William' AGM

Modern hybrid tea bush rose

Rosa 'Ruby Wedding'

Traditional hybrid tea bush rose

Rosa 'Sexy Rexy' AGM

Modern floribunda bush rose

Rosa 'Silver Jubilee' AGM

Traditional hybrid tea bush rose

Rosa 'The Fairy' Pink

Patio rose

Rosa 'The Fairy' Red

Patio rose

Rosa 'The Fairy' White

Patio rose

Rudbeckia fulgida var. deamii AGM

Coneflower

Rudbeckia fulgida var. sullivantii 'Goldsturm' AGM

Coneflower

Rudbeckia 'Goldquelle'

Coneflower

Rudbeckia hirta 'Marmelade'

Coneflower

Rudbeckia hirta 'Prairie Sun'

Gloriosa daisy

Rudbeckia laciniata 'Herbstsonne' AGM

Coneflower

Rudbeckia laciniata 'Juligold'

Coneflower

Rumex sanguineus var. sanguineus

Bloody sorrel

Salix 'Erythroflexuosa'

Contorted willow

Salix alba 'Dart's Snake'

Contorted willow

Salix integra 'Hakuro-nishiki'

Japanese willow

Salvia nemerosa 'Ostfriesland' AGM

Meadow sage

Salvia nemerosa 'Rosakoenigin'

Meadow sage

Salvia nemerosa 'Rosenwein'

Meadow sage

Salvia nemorosa 'Caradonna'

Meadow sage

Salvia pratensis 'Indigo' AGM

Meadow clary

Salvia verticillata 'Alba'

Salvia verticillata 'Purple Rain'

Salvia x sylvestris 'Mainacht' AGM

= 'May Night' AGM

Sambucus nigra f. porphyrophylla 'Black Lace' (syn 'Eva')

Black elder

Sambucus nigra f.porphyrophylla 'Thundercloud'

Black elder

Sanguisorba caucasica

Burnet

Santolina 'Lambrook Silver'

Cotton lavender

Saxifraga 'Aureopunctata'

Saxifrage

Saxifraga 'Gothenburg'

Saxifrage

Saxifraga 'Rosea' (paniculata) AGM

Saxifrage

Scabiosa 'Butterfly Blue'

Pincushion flower

Scabiosa caucasica 'Blausiegel'

Pincushion flower

Scabiosa caucasica 'Miss Wilmott' AGM

Pincushion flower

Schizachyrium scoparium

Little bluestem

Schizostylis coccinea 'Fenland Daybreak'

Kaffir lily

Schizostylis coccinea 'Mollie Gould'

Kaffir lily

Schizostylis coccinea 'Pink Princess'

Kaffir lily

Schizostylis coccinea 'Sunrise' AGM

Kaffir lily

Sedum 'Bertram Anderson' AGM

Stonecrop

Sedum 'Citrus Twist'

Sedum erythrostictum 'Frosty Morn'

Ice plant

Sedum erythrostictum 'Mediovariegatum'

Ice plant

Sedum 'Herbstfreude' ('Autumn Joy') AGM

Ice plant

Sedum kamtschaticum var. kamtschaticum 'Variegatum' AGM

Stonecrop

Sedum 'Purple Emperor'

Stonecrop

Sedum 'Ruby Glow' AGM

Stonecrop

Sedum spectabile 'Brilliant' AGM

Ice plant

Sedum spectabile 'Iceberg'

Ice plant

Sedum spurium variegatum

Stonecrop

Sedum 'Stewed Rhubarb Mountain'

Stonecrop

Sedum telephium 'Matrona'

Orpine

Sedum 'Vera Jameson' AGM

Stonecrop

Sempervivum 'Pilatus'

Houseleek

Sempervivum 'Silberring'

Houseleek

Sempervivum 'Tederheid'

Houseleek

Senecio polyodon

Sesleria nitida

Nest Moor Grass

Sidalcea candida 'Bianca'

Prairie mallow

Sidalcea malviflora 'Rosaly'

Prairie mallow

Silene dioica

Campion

Silene uniflora

Campion

Silene uniflora 'Compacta'

Campion

Sisyrinchium striatum 'Aunt May'

Skimmia japonica 'Rubella'

Skimmia 'Nymans' AGM

Skimmia x confusa 'Kew Green' AGM

Skimmia x confusa 'Red Riding Hood'

Smilacina racemosa AGM

False Solomon's seal

Solanum conchifolium

Solanum crispum 'Glasnevin' AGM

Chilean potato tree

Solanum laxum 'Aureovariegatum'

Potato vine

Soldanella alpina

Snowbell

Sollya heterophylla AGM

Bluebell creeper

Sollya heterophylla pink-flowered

Pink 'bluebell creeper'

Spartina pectinata aureomarginata

Spiraea 'Anthony Waterer'

Spiraea 'Arguta' AGM

= S.x arguta 'Bridal Wreath')

Spiraea japonica 'Gold Mound'

Spiraea japonica 'Goldflame'

Spiraea japonica 'Little Princess'