| Cultivar Name | Plant Size | Origin | Flower Color | Season | Source | Registered |
| 'Dainty Dwarf' | Small | Unknown | Pale-Lavender | July into August | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Dakota' | Giant | Unknown | - | - | Wade, Van | --NR-- |
| 'Dale's Blue Gray' | Large | Unknown | Pale-Lavender | June into July | Maroushek, Lillian & Snyder, Ron | .1998 |
| 'Dana Nicolette' | Medium | Hybrid | Light-Purple | July | Weissenberger, Henry & Walek, Kevin | .2009 |
| 'Dancing in the Dark' | Medium | Hybrid | Pale-Lavender | August to October | Dalton, Jim & Dalton, Meg | .2012 |
| 'Dancing Mouse' | Miniature | Sport | Light-Purple | July | Fransen, Marco | --NR-- |
| 'Dancing with Dragons' | Medium | Hybrid | Near-White | July into August | Hansen, Hans & Walters Gardens | .2018 |
| 'Daniel' | Miniature | Hybrid | Pale-Lavender | - | Weissenberger, Henry | .1986 |
| 'Dark Horse' | Giant | Hybrid | Med-Lavender | June into July | Fox, Bob & Fox Hosta Farm | .2018 |
| 'Dark Secret' | Giant | Hybrid | Near-White | June into July | Ward, Dr Dick & Ward, Jane | .2009 |
| 'Dark Side' | Large | Unknown | - | - | Goodwin, Randy | --NR-- |
| 'Darkside' (Ward) | Large | Unknown | Near-White | June into July | Ward, Dr Dick & Ward, Jane | --NR-- |
| 'Daughter of Ledi Lantis' | Medium | Hybrid | Near-White | June | Seaver, Mildred | --NR-- |
| 'Dauntless' | Medium | Hybrid | Near-White | June into July | Ruh, Peter | .2002 |
| 'David F. Mahoney' | Giant | Hybrid | Near-White | June into July | Chamberlain, Steve | .2001 |
| 'Deane's Dream' | Medium | Hybrid | Pale-Lavender | July into August | Solberg, Robert | .2000 |
| 'Dear Heart' | Large | Hybrid | Pale-Lavender | July | Minks, Eldren | .1975 |
| 'Deep Blue Sea' | Large | Hybrid | Pale-Lavender | July | Seaver, Charles | .1994 |
| 'Deep Blue Star' | Medium | Unknown | Med-Lavender | - | Unknown | --NR-- |
| 'Deep Purple' | Medium | Unknown | Light-Purple | - | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Deep Waters' | Large | Hybrid | Pale-Lavender | July into August | Dean, Don | .2014 |
| 'Delaware Blue Hen' | Giant | Unknown | - | June into July | Kruer, George | .2009 |
| 'Delaware River' | Medium | Unknown | Med-Lavender | July into August | Malloy, Alex | .2005 |
| 'Delta Blues' | Large | Hybrid | Pale-Lavender | June into July | Ward, Dr Dick & Ward, Jane | .2012 |
| 'Denim Jacket' | Small | Hybrid | - | July into August | Mullin, Joy & Zilis, Mark | .2009 |
| 'Density' | Large | Unknown | Near-White | July | Minks, Eldren | .1990 |
| 'Devon Blue' | Medium | Unknown | Pale-Lavender | July into August | Smith, Eric & Bowden, Roger & Bowden, Ann | .1988 |
| 'Devon Dream' | Small | Sport | Med-Lavender | July into August | Bowden, Roger & Bowden, Ann | --NR-- |
| 'Devon Giant' | Giant | Hybrid | Near-White | July into August | Bowden, Roger | .2019 |
| 'Devon Mist' | Large | Hybrid | Pale-Lavender | - | Bowden, Roger & Ruh, Peter | .2005 |
| 'Dewed Steel' | Small | Unknown | Light-Purple | August to October | Van Eechaute, Danny | .2006 |
| 'Diablo' | Medium | Unknown | Near-White | June into July | Dalton, Jim & Dalton, Meg | .2012 |
| 'Diamond Jubilee' | Large | Hybrid | Pale-Lavender | July | Savory, Dennis | .2006 |
| 'Diamond Lake' | Medium | Unknown | Pale-Lavender | June into July | Walters Gardens | --NR-- |
| 'Dick Strub' | Large | Hybrid | - | - | Zilis, Mark | --NR-- |
| 'Dilys' | Medium | Unknown | Light-Purple | July | Smith, Eric | --NR-- |
| 'Dimple' | Small | Unknown | Pale-Lavender | July | Chatto, Beth | .2002 |
| 'Dixie Cups' | Medium | Hybrid | Pale-Lavender | July into August | Avent, Tony | .2007 |
| 'Do Wop' | Miniature | Hybrid | - | July into August | Avent, Tony | .2007 |
| 'Doctor Bill-Bob' | Large | Unknown | Near-White | - | Seaver, Mildred & Walek, Kevin | .2009 |
| 'Doctor Yahr' | Large | Unknown | - | - | Miller, Jeff & Wisconsin Hosta Society | --NR-- |
| 'Dolcissimo' | Large | Hybrid | - | - | Sisson, Kathie | --NR-- |
| 'Donauwelle' | Large | Unknown | - | - | Becherer, Josef | --NR-- |
| 'Dorothy's Brother' | Medium | Hybrid | Near-White | June into July | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Dorset Blue' | Small | Unknown | Pale-Lavender | August | Smith, Eric & Aden, Paul | .1977 |
| 'Dorset Blueblood' | Small | Sport | Pale-Lavender | July | Zilis, Mark | --NR-- |
| 'Dorset Charm' | Medium | Hybrid | Pale-Lavender | August | Smith, Eric & Ruh, Peter | .1990 |
| 'Dorset Flair' | Medium | Hybrid | Light-Purple | August to October | Smith, Eric & Ruh, Peter | .1990 |
| 'Dr Topper Hagerman' | Large | Hybrid | - | June into July | Kwick, Charles | .2016 |
| 'Dr. Hale' | Large | Unknown | Near-White | June into July | Unknown | --NR-- |
| 'Dragon Fire' | Medium | Hybrid | Light-Purple | August | Lefever, Wyatt & Solberg, Robert | .2005 |
| 'Dragon Lady' | Giant | Unknown | - | July | Seaver, Mildred | --NR-- |
| 'Dragon Slayer' | Giant | Hybrid | Pale-Lavender | June into July | Dalton, Jim & Dalton, Meg | .2012 |
| 'Drake's Tail' | Medium | Unknown | Near-White | - | Black, Gwen | --NR-- |
| 'Dream in Blue' | Medium | Hybrid | Pale-Lavender | - | Anderson, Marlys | --NR-- |
| 'Driveaway the Blues' | Large | Unknown | Near-White | June into July | Brashear, Carol | --NR-- |
| 'Dry Ice' | Medium | Sport | - | - | Unknown | --NR-- |
| 'Dubuque Blues' | Large | TC Sport | Near-White | June into July | Schwarz, Jim | --NR-- |
| 'Dubuque University Spartans' | Medium | Unknown | - | June into July | Freeman, Franc | .2011 |
| 'Duke' | Large | Unknown | Near-White | June into July | Savory, Robert | .1988 |
| 'Dumbo' (Savory) | Giant | Unknown | Light-Purple | June into July | Savory, Dennis | .2007 |
| 'Dusty Moon' | Medium | Sport | Near-White | June into July | McHugh, Ed | .2012 |
| 'Dusty Waters' | Small | Sport | Near-White | July | Naylor Creek Nursery | --NR-- |
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