The following is a list of dahlia cultivars which have gained the Royal Horticultural Society's Award of Garden Merit. They are tuberous perennials, originally from South America, with showy daisy-like composite flowerheads in all shades and combinations of white, yellow, orange, pink and red, flowering in late summer and autumn (fall). Much work has been done on the development of a range of flower shapes and sizes. They may be sold as dry tubers in Spring, and started off in heat before being planted out after all danger of frost has passed. Alternatively they can be purchased later in the season, in pots ready to flower. Dwarf bedding types are usually cultivated as annuals and discarded after flowering. In mild areas without penetrating frosts, mature plants can be overwintered in the garden; otherwise, they are lifted and stored in a frost free place. They are easily propagated from cuttings in Spring.

Flower shapes can be divided into 14 main groups:- single: less than - open centred, with a single or double row of ray florets waterlily: miniature, small or medium sized blooms - double, with a small number of flattened, rounded ray florets collerette: - single row of flat ray florets surrounding an inner collar of shorter florets and a central disc anemone-flowered: - upward-pointing, tubular florets, surrounded by one or more rows of flattened ray florets pompon: - tightly spherical small blooms with florets in a scale-like arrangement ball: similar to pompon but larger in size semi-cactus: double flowers in a range of sizes; many pointed, recurved ray florets cactus: double flowers in a range of sizes; many pointed, recurved ray florets that are narrower than semi-cactus flowers decorative: fully double flowers with the central disc completely hidden; the broad florets may be pointed and twisted miscellaneous: including peony-flowered, orchid-flowered, chrysanthemum-flowered, dwarf bedding

As of 2015, 124 cultivars are listed. Maximum dimensions of plants are shown in centimetres.

Name Type Colour Height (cm) Spread (cm) Ref Allan Sparkes waterlily pink 150 100 Almand's Climax decorative pink 100 100 Alva's Doris semi-cactus red 120 60 Alva's Supreme decorative yellow (pale) 120 60 Ann Breckenfelder collerette red/yellow 170 100 April Heather collerette yellow/pink 125 50 Asahi Chohje anemone red/white 150 100 Bednall Beauty dwarf bedding red 50 50 Bishop of Llandaff peony red 110 45 Blyton Softer Gleam decorative yellow/orange 135 100 Bridge View Aloha semi-cactus yellow/red 150 100 Brookfield Delight single orange 50 50 Charlie Dimmock waterlily orange/yellow 185 150 Chat Noir semi-cactus red/purple 170 100 Clair de Lune collerette cream 110 60 Cream Alva's decorative cream 150 100 David Howard decorative yellow (bronze) 100 50 Don Hill collerette red/yellow 150 100 Dovegrove single red 100 50 Edwin's Sunset waterlily red 120 50 Ellen Huston dwarf bedding orange (scarlet) 50 50 Exotic Dwarf single lilliput pink/purple/yellow 40 40 Fascination peony pink 60 45 Figurine waterlily pink (pale) 100 50 Finchcocks waterlily orange 120 60 Freya's Paso Doble anemone white/yellow 110 60 Fusion decorative white/pale pink 100 50 Gallery Art Deconamed after the 20th-century art style Art Deco decorative orange/red 100 50 Gallery Art Fair decorative white 50 50 Gallery Art Nouveaunamed after the 19th/20th-century art style Art Nouveau decorative pink (raspberry) 100 50 Gallery La Tour decorative pink 50 50 Gallery Leonardonamed after the Renaissance artist Leonardo da Vinci decorative pink 50 50 Gallery Pablonamed after the Spanish painter Pablo Picasso decorative pink/yellow 50 50 Gallery Rembrandtnamed after the Dutch painter Rembrandt decorative pink (bright) 100 50 Gallery Renoirnamed after the French painter Pierre-Auguste Renoir decorative pink (rose) 50 50 Gallery Vincentnamed after the Dutch painter Vincent van Gogh decorative yellow/orange 50 50 Geoffrey Kent decorative red 100 50 Glorie van Heemstede decorative yellow 130 60 Grenadier decorative red 100 100 Hamari Accord semi-cactus yellow (pale) 120 60 Hamari Bride semi-cactus white 120 60 Hamari Gold decorative yellow 120 60 Hamari Rosé ball pink/yellow 120 60 Hamilton Lillian decorative orange 120 60 ='Hdpu165' single purple 40 40 single red/yellow 80 50 single pink/white 80 50 single purple-pink/red 60 50 Harvest Samantha single lilliput pink (deep) 70 50 Hillcrest Candy semi-cactus pink/white 150 50 Hillcrest Desire cactus orange 120 60 Hillcrest Regal collerette red (deep) 120 60 Hillcrest Royal cactus purple 120 60 Honka single orchid yellow 100 50 Jodie Wilkinson ball peach/lemon 120 50 Jomanda ball orange 110 60 Josie Gott ball white/purple 100 50 Karenglen decorative orange 110 60 Kenora Sunset semi-cactus yellow/orange 120 60 Kenora Valentine decorative red 120 60 Kidd's Climax decorative red 110 60 Kilburn Rose waterlily pink/peach 100 50 Knockout single yellow/orange 100 100 Lakeland Sunset cactus yellow 100 100 Le Castel waterlily white 100 100 Lemon Elegans semi-cactus yellow (lemon) 130 100 Lilac Marston decorative lila/purple 150 100 Lilac Taratahi cactus pink 150 100 Lismore Willie waterlily yellow (bronze) 120 60 Magenta Star single pink (magenta) 130 100 Maiko Girl double orchid pink 100 50 Marie Schnugg single orchid red/yellow 50 50 Mary's Jomanda ball pink/purple 150 100 Mayan Pearl double orchid pink 65 50 Melody Harmony decorative pink/white 80 50 Moonfire dwarf bedding yellow/red 75 45 My-nute Blend misc orange/yellow 50 50 Oakwood Naranga decorative orange 100 50 Ocean Bird decorative pink 100 50 Omo single lily white/yellow 40 40 Otto's Thrill decorative pink (soft) 110 50 Pearl of Heemstede decorative pink (silvery) 100 45 Pink Giraffe double orchid pink 135 50 Pink Pastelle semi-cactus pink 120 60 Pooh - Swan Island collerette orange/yellow 100 50 Preston Park dwarf bedding red (scarlet) 45 45 ='Vdtg43' single pink/purple 40 40 Rhonda Suzanne pompon purple (pale) 150 50 Ruby MurrayRuby Murray was a British singer decorative pink (deep) 75 50 Ryecroft Jan ball white 165 100 Ryecroft Marge anemone pink/yellow 150 100 Shep's Memory waterlily peach 180 100 Small World pompon white 110 60 So Dainty semi-cactus orange (pale) 110 60 Tally Honamed after the foxhunting term "Tally Ho" miscellaneous orange (pale) 60 45 Taratahi Ruby waterlily red 150 100 Trelyn Crimson collerette red 120 50 Trelyn Daisy collerette white/yellow 140 140 Trelyn Kiwi semi-cactus pink/white 100 50 Trelyn Rhiannon cactus pink/yellow 180 100 Twyning's After Eight single white 100 100 Twyning's Revel single pink (deep) 120 100 Waltzing Mathilda misc. orange/pink 70 50 Westerton Folly ball pink (deep) 120 50 Weston Pirate cactus red (ruby) 150 100 Weston Spanish Dancer cactus yellow/red 150 100 Weston Stardust cactus pink/yellow 100 50 White Alva's decorative white 120 60 White Ballet decorative white 90 60 Witteman's Superba semi-cactus red (crimson) 150 100 Wootton Cupid ball pink/yellow 110 60 Wootton Impact semi-cactus yellow (bronze) 110 60 Yellow Hammer dwarf bedding yellow (pale) 60 45 Zorronamed after the fictional outlaw Zorro decorative red (crimson) 120 60

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Dahlia