| Rating | Plant | Thumbnail |
| Small Fimbriated Cactus Dahlia 'D.D. Frosted Lace'
Dahlia |  |
| Anemone Flowered Dahlia 'Dad's Favorite'
Dahlia |  |
| Dwarf Dahlia, Decorative Dahlia 'Dahlietta Marissa'
Dahlia
Additional info: (Dahlietta™ series) |  |
| Semi Cactus Dahlia 'Daleko Jupiter'
Dahlia
Hybridized by Krzywicki, 1979 |  |
| Decorative Dahlia 'Dalina Midi Jamaica'
Dahlia
Additional info: (aka Dalina® Midi series) | |
| Decorative Dahlia 'Danjo Doc'
Dahlia |  |
| Dahlia 'Dare Devil'
Dahlia |  |
| Single Flowered Border Dahlia 'Dark Desire'
Dahlia |  |
| Decorative Dahlia 'Dark Magic'
Dahlia |  |
| Single Dahlia 'Dark Side of the Sun'
Dahlia
Additional info: (Mystic series; aka Mystic Haze) |  |
| Semi Cactus Dahlia 'Dauntless'
Dahlia |  |
| Dahlia 'Davenport Honey'
Dahlia |  |
| Decorative Dahla 'David Howard'
Dahlia | |
| Waterlily Dahlia 'Day Dreamer'
Dahlia | |
| Decorative Dahlia 'Decorette'
Dahlia
Hybridized by Verwer, 1988 | |
| Dahlia 'Deepest Yellow'
Dahlia | |
| Decorative Dahlia 'Delicious Lemon Zest'
Dahlia
Hybridized by Gitzels, 2004
Additional info: (PP16448, Delicious Series, aka Baldelemz) |  |
| Dahlia 'Delight Mixed'
Dahlia variabilis | |
| Dwarf Dahlia 'Delighting Glow'
Dahlia
Additional info: (Glow® series) |  |
| Dahlia 'Delta Red'
Dahlia |  |
| Dahlia 'Desert Lodge'
Dahlia |  |
 | Formal Decorative Dahlia 'Deuil du Roi Albert'
Dahlia |  |
| Semi Cactus Dahlia 'Devon Citation'
Dahlia |  |
| Dahlia 'Devotion'
Dahlia | |
| | Dwarf Dahlia 'Diablo Mix'
Dahlia |  |
| Anemone Flowered Dahlia 'Diamant Rose'
Dahlia | |
| Semi Cactus Dahlia 'Diamond Rebel'
Dahlia
Hybridized by R. Lawrence, 1998 |  |
| Formal Decorative Dahlia 'Diva'
Dahlia
Hybridized by Swan Island, 2010 |  |
| Single Flowered Border Dahlia 'Dizzy'
Dahlia |  |
| Informal Decorative Dahlia 'Dohyoiri'
Dahlia
Hybridized by Konishi |  |
| Collarette Dahlia 'Don Hill'
Dahlia | |
| Pompon Dahlia 'Dot Com'
Dahlia |  |
| Dahlia 'Double Extreme'
Dahlia variabilis |  |
| Collarette Dahlia 'Double Trouble'
Dahlia |  |
| Tree Dahlia, Double White Tree Dahlia 'Double White'
Dahlia imperialis |  |
| | Miniature Ball Dahlia 'Downham Royal'
Dahlia |  |
| Dahlia 'Dr. Gary E. Goodman'
Dahlia
Hybridized by Probizanski, 1999 |  |
| Semi Cactus Dahlia 'Dr. Les'
Dahlia
Hybridized by Almand, 1975 |  |
| Single Flowered Border Dahlia 'Dracula'
Dahlia
Hybridized by Verwer, 2007
Additional info: (Dark Angel Series) |  |
| Single Flowered Border Dahlia 'Dragon Ball'
Dahlia
Hybridized by Verwer, 2007
Additional info: (Dark Angel Series) |  |
