| Medium Size Hostas | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Dab A Green' | Yellow | Marginal | Green | TC Sport | Pale-Lavender | July | Zilis, Mark | .2006 |
| 'Daihakuryo' | Med-Green | Medial | White | Nat-Sport | Pale-Lavender | July | Watanabe, Kenji | --NR-- |
| 'Dakomo' | Yellow | - | - | Hybrid | Pale-Lavender | June into July | Livingston, Ron | --NR-- |
| 'Dalton's Pick' | Yellow | - | - | Unknown | Pale-Lavender | June into July | Terpening, Kent | .2005 |
| 'Damascus Road' | Yellow | - | - | Hybrid | - | - | Malloy, Alex | --NR-- |
| 'Dan Patch' | Med-Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | August to September | Savory, Dennis | .2012 |
| 'Dana Nicolette' | Blue/Green | - | - | Hybrid | Light-Purple | July | Weissenberger, Henry & Walek, Kevin | .2009 |
| 'Dance With Me' | Med-Green | Medial | Creamy White | Nat-Sport | Pale-Lavender | July | Hansen, Hans | .2002 |
| 'Dancing Cobra' | Med-Green | Marginal | White | Unknown | Light-Purple | July into August | Vincun, Rachel | .2003 |
| 'Dancing Darling' | Dark-Green | Medial | Yellow | Nat-Sport | Pale-Lavender | July | van den Top, Jan | --NR-- |
| 'Dancing Flame' | Med-Green | Marginal | White | Nat-Sport | Pale-Lavender | July into August | Jones, Leonard | .2006 |
| 'Dancing in the Dark' | Blue/Green | - | - | Hybrid | Pale-Lavender | August to October | Dalton, Jim & Meg | .2012 |
| 'Dancing Stars' | Blue/Green | Medial | White | TC Sport | Pale-Lavender | June into July | Zwagerman, Mary & Walters Gardens | .2009 |
| 'Dancing with Dragons' | Blue/Green | - | - | Hybrid | Near-White | July into August | Hansen, Hans & Walters Gardens | .2018 |
| 'Dandy's Pride' | Med-Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July into August | Elslager, Ed | .1999 |
| 'Dang Awesome' | Dark-Green | - | - | Hybrid | Light-Purple | July into August | Kwick, Charles | .2017 |
| 'Danica Poul' | Light-Green | Streaked | Speckles | Unknown | - | - | Hansen, Hans Ejler | --NR-- |
| 'Danubie Isla' | Blue/Green | Streaked | Yellow | Unknown | - | - | Kósa, Lehel | --NR-- |
| 'Dapper Jim' | Med-Green | Streaked | Yellow | Hybrid | Pale-Lavender | August | Elslager, Ed | .1999 |
| 'DaPra's Delight' | Dark-Green | - | - | Unknown | Pale-Lavender | July into August | DaPra, Sarah | .2000 |
| 'Dark Matter' | Dark-Green | - | - | Hybrid | Pale-Lavender | June into July | Kedl, Phyllis | .2010 |
| 'Dark Star' | Light-Green | Marginal | Creamy White | Hybrid | Pale-Lavender | July into August | Herold, Roy | .1999 |
| 'Dark Vader' | Dark-Green | - | - | Hybrid | - | - | Balitewicz, Bob | --NR-- |
| 'Dark Victory' | Dark-Green | - | - | Hybrid | - | June into July | Savory, Robert | .1977 |
| 'Darwin's Gold' | Yellow | - | - | Unknown | - | - | Wasitis, Chick | --NR-- |
| 'Darwin's Standard' | Light-Green | Marginal | Green | Nat-Sport | Near-White | June | Klinkhamer, Luc & Witteman | --NR-- |
| 'Daughter of Ledi Lantis' | Blue/Green | - | - | Hybrid | Near-White | June | Seaver, Mildred | --NR-- |
| 'Dauntless' | Blue/Green | - | - | Hybrid | Near-White | June into July | Ruh, Peter | .2002 |
| 'Dave' | Yellow | Marginal | Green | Nat-Sport | Pale-Lavender | June into July | Kuk, Bob | .2011 |
| 'David Stone' | Light-Green | - | - | Nat-Sport | Near-White | June into July | Summers, Alex | --NR-- |
| 'Davidson 87' | Dark-Green | - | - | Unknown | Pale-Lavender | August | Suzuki, Kichigoro & Davidson LeRoy | --NR-- |
| 'Dawes' | Dark-Green | Medial | Yellow | Hybrid | Pale-Lavender | July | Ward, Dr Dick & Jane | .2005 |
| 'Dax' | Dark-Green | Medial | Green | Nat-Sport | Pale-Lavender | July into August | Dupre, Dirk | .2006 |
| 'Day Dream' | Yellow | - | - | Nat-Sport | Pale-Lavender | July into August | Trucks, Gary | .1998 |
| 'Deane's Dream' | Blue/Green | - | - | Hybrid | Pale-Lavender | July into August | Solberg, Robert | .2000 |
| 'Debutante' | Med-Green | Streaked | Yellow | Hybrid | Pale-Lavender | July into August | Aden, Paul | .1978 |
| 'Deceiver' | Light-Green | Streaked | Yellow | Hybrid | Pale-Lavender | July | Asch, Stuart | .2003 |
| 'Decorata' | Dark-Green | Marginal | White | Unknown | Deep-Purple | July into August | Bailey, Liberty Hyde & AHS | .2001 |
| 'Decorata Normalis' | Med-Green | - | - | Unknown | Light-Purple | August | Unknown | --NR-- |
| 'Deep Blue Star' | Blue/Green | - | - | Unknown | Med-Lavender | - | Unknown | --NR-- |
| 'Deep Purple' | Blue/Green | - | - | Unknown | Light-Purple | - | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Deja Blu' | Med-Green | Marginal | Creamy White | Nat-Sport | Pale-Lavender | July | Walters Gardens | .2005 |
| 'Delaware River' | Blue/Green | - | - | Unknown | Med-Lavender | July into August | Malloy, Alex | .2005 |
| 'Delicious' | Med-Green | Marginal | White | Nat-Sport | Light-Purple | August | Zilis, Mark | .2012 |
| 'Delightful' | Med-Green | - | - | Unknown | Light-Purple | - | Livingston, Ron | --NR-- |
| 'Delightful Dorothy' | Med-Green | Marginal | Yellow | Unknown | - | - | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Delona's Smile' | Yellow | - | - | Unknown | Pale-Lavender | June into July | Solberg, Robert | .2013 |
| 'Delta Force' | Med-Green | Streaked | Speckles | Nat-Sport | Near-White | June into July | Vaughn, Kevin | --NR-- |
| 'Delta Pride' | Med-Green | Marginal | Yellow | TC Sport | Near-White | June into July | Zilis, Mark | .2003 |
| 'Demetriou's Gold' | Light-Green | - | - | Unknown | Med-Lavender | June into July | Demetriou, Brenda & John | .2001 |
| 'Derriere' | Med-Green | - | - | Nat-Sport | None | None | Hartmann, Jim | .2012 |
| 'Desert Sun' | Yellow | - | - | Unknown | - | - | Stark, Dean | --NR-- |
| 'Designed 4 U' | - | - | - | TC Sport | - | - | Van Eechaute, Danny | --NR-- |
| 'Designer Genes' | Light-Green | - | - | Hybrid | Light-Purple | July | Wrede, Arthur | .2005 |
| 'Devil May Care' | Med-Green | - | - | Unknown | - | - | Meyer, Bill | --NR-- |
| 'Devil's Delight' | Med-Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July into August | Danik, Robert | .2013 |
| 'Devil's Poker' | Med-Green | - | - | Hybrid | - | September | Savory, Dennis | .2009 |
| 'Devon Blue' | Blue/Green | - | - | Unknown | Pale-Lavender | July into August | Smith, Eric & Bowden, Roger and Ann | .1988 |
| 'Devon Cloud' | Med-Green | Medial | Yellow | Nat-Sport | Med-Lavender | July | Bowden, Roger & Ann | --NR-- |
| 'Devon Cream' | Dark-Green | - | - | Unknown | Med-Lavender | - | Unknown | --NR-- |
| 'Devon Green' | Dark-Green | - | - | Nat-Sport | Pale-Lavender | July | Bowden, Roger & Ruh, Peter | .2005 |
| 'Devon Moor' | Med-Green | - | - | Unknown | - | - | Bowden, Roger | --NR-- |
| 'Devon Tot' | Med-Green | - | - | Unknown | Med-Lavender | - | Bowden, Roger & Ann | --NR-- |
| 'Diablo' | Blue/Green | - | - | Unknown | Near-White | June into July | Dalton, Jim & Meg | .2012 |
| 'Diadem' | Dark-Green | Marginal | Yellow | Nat-Sport | Near-White | June into July | Snyder, Ron | .2002 |
| 'Diamond Lake' | Blue/Green | - | - | Unknown | Pale-Lavender | June into July | Walters Gardens | --NR-- |
| 'Diana Remembered' | Med-Green | Marginal | Creamy White | Nat-Sport | Near-White | August | Kulpa, John | .1997 |
| 'Diane Gray Dalton' | Dark-Green | Streaked | White | Unknown | Med-Lavender | July | Seaver, Mildred & Walek, Kevin | .2009 |
| 'Diane's Fancy' | Blue/Green | Marginal | White | Nat-Sport | Med-Lavender | July into August | Seaver, Mildred | --NR-- |
| 'Dianne' | Yellow | Streaked | Yellow | Nat-Sport | Pale-Lavender | July | Owens, Clarence | .1985 |
| 'Dilys' | Blue/Green | - | - | Unknown | Light-Purple | July | Smith, Eric | --NR-- |
| 'Dimpled Chad' | Dark-Green | Marginal | White | Hybrid | Pale-Lavender | July | Elslager, Ed | .2001 |
| 'Dinky Donna' | Med-Green | Streaked | Yellow | Nat-Sport | Pale-Lavender | June into July | Heemskerk, Gerardus | .2011 |
| 'Dinner Jacket' | Med-Green | Medial | Yellow | TC Sport | Pale-Lavender | July into August | Unknown | --NR-- |
| 'Disorder' | Dark-Green | Streaked | Yellow | Unknown | - | - | Unknown | --NR-- |
| 'Dixie Cups' | Blue/Green | - | - | Hybrid | Pale-Lavender | July into August | Avent, Tony | .2007 |
| 'Dixieland Delight' | Med-Green | Marginal | Yellow | Hybrid | Light-Purple | July into August | Avent, Tony | .2007 |
| 'Dixieland Jazz' | Med-Green | - | - | Hybrid | Near-White | July into August | Ruh, Peter & Gilligan, Madelon | .2017 |
| 'Doc Adams' | Dark-Green | Medial | Yellow | Unknown | - | - | Westberg, Jim | --NR-- |
| 'Doctor Fu Manchu' | Dark-Green | - | - | Hybrid | Light-Purple | September | Sugita, Hajime & Ruh, Peter | .1998 |
| 'Dogtown Emerald Gem' | Med-Green | Medial | White | Unknown | - | - | Klotz, Ruby | --NR-- |
| 'Dogtown Green Ice' | Med-Green | Streaked | Yellow | Unknown | - | - | Klotz, Ruby | --NR-- |
| 'Dogtown Luscious Cups' | Med-Green | Streaked | Yellow | Unknown | - | - | Klotz, Ruby | --NR-- |
| 'Dogwood Mist' | Light-Green | Marginal | White | Unknown | - | - | Unknown | --NR-- |
| 'Don Juan' | Med-Green | - | - | Nat-Sport | Light-Purple | August | Seaver, Mildred | .2009 |
| 'Don Quixote' | Med-Green | Streaked | White | Nat-Sport | Light-Purple | August | Seaver, Mildred | .2004 |
| 'Don Stevens' | Med-Green | Marginal | White | Unknown | Light-Purple | August | Seaver, Mildred | .2005 |
| 'Don Stevens Green' | Dark-Green | - | - | Nat-Sport | Light-Purple | August | Wade, Van | --NR-- |
| 'Don Stevens Splashed' | Med-Green | Streaked | White | Nat-Sport | Light-Purple | August | Unknown | --NR-- |
| 'Don Stevens Variegated' | Med-Green | Streaked | Speckles | Nat-Sport | Light-Purple | August | Unknown | --NR-- |
| 'Don Viejo' | Med-Green | - | - | Nat-Sport | Light-Purple | August | Crockett, Clyde | --NR-- |
| 'Donhead St. Andrew' | Dark-Green | Streaked | White | Unknown | - | - | Unknown | --NR-- |
| 'Donna' | Med-Green | - | - | Hybrid | Pale-Lavender | July into August | Graves, Butch | .2011 |
| 'Don't Taz Me Bro' | Med-Green | Streaked | White | Hybrid | - | August to September | Freeman, Franc & Sally | .2010 |
| 'Dorothy' | Dark-Green | - | - | Hybrid | Light-Purple | August | Williams, Frances & AHS | .1986 |
| 'Dorothy Benedict' | Med-Green | Streaked | Yellow | Hybrid | Near-White | June into July | Benedict, Dr Ralph (Herb) | .1983 |
| 'Dorothy's Brass Band' | Yellow | - | - | Unknown | - | June into July | Benedict, Dr R. (Herb) & Walek, Kevin | .2009 |
| 'Dorothy's Brother' | Blue/Green | - | - | Hybrid | Near-White | June into July | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Dorothy's Child' | Med-Green | Streaked | White | Hybrid | Near-White | June | Kuenster, Rod | .2007 |
| 'Dorset Blue Streaked' | Blue/Green | Streaked | White | Nat-Sport | - | - | Fransen, Marco & Joyce | --NR-- |
| 'Dorset Charm' | Blue/Green | - | - | Hybrid | Pale-Lavender | August | Smith, Eric & Ruh, Peter | .1990 |
| 'Dorset Flair' | Blue/Green | - | - | Hybrid | Light-Purple | August to October | Smith, Eric & Ruh, Peter | .1990 |
| 'Dotted Fantasy' | Yellow | Marginal | White | Unknown | - | - | Unknown | --NR-- |
| 'Double D Cup' | Light-Green | Marginal | Green | Unknown | - | - | Asch, Stuart | --NR-- |
| 'Double Edge' | Blue/Green | Marginal | Yellow | Hybrid | Pale-Lavender | July | Aden, Paul | .1982 |
| 'Double Exposure' | Med-Green | Medial | Yellow | Unknown | - | - | Asch, Stuart | --NR-- |
| 'Double Your Pleasure' | Light-Green | - | - | Hybrid | Pale-Lavender | June into July | Brown, Sandy | .2018 |
| 'Doubled Up' | Dark-Green | - | - | Nat-Sport | Pure-White | July into August | Solberg, Robert | .2011 |
| 'Doublemint' | Light-Green | Streaked | Yellow | Hybrid | Pale-Lavender | July | Elslager, Ed | .2001 |
| 'Dracula' | Med-Green | - | - | Nat-Sport | Light-Purple | August | Fransen, Marco & Joyce | --NR-- |
| 'Dragon Fire' | Blue/Green | - | - | Hybrid | Light-Purple | August | Lefever, Wyatt & Solberg, Robert | .2005 |
| 'Dragon Heart' | Med-Green | - | - | Unknown | Light-Purple | July into August | Livingston, Ron | --NR-- |
| 'Dragon of the Seas' | Blue/Green | Marginal | White | Unknown | Light-Purple | July | Beilstein, Doug | .2012 |
| 'Dragon Warrior' | Dark-Green | Marginal | White | Nat-Sport | Light-Purple | August | van den Top, Jan | --NR-- |
| 'Dragon's Blood' | Med-Green | - | - | Hybrid | Pale-Lavender | July into August | Sugita, Hajime & Ruh, Peter | .1998 |
| 'Dragon's Eye' | Med-Green | - | - | Hybrid | Pale-Lavender | August | Lefever, Wyatt & Solberg, Robert | .2008 |
| 'Drake's Tail' | Blue/Green | - | - | Unknown | Near-White | - | Black, Gwen | --NR-- |
| 'Drama Queen' | Dark-Green | - | - | Unknown | - | - | Stark, Dean | --NR-- |
| 'Drawn Butter' | Med-Green | - | - | Hybrid | Pale-Lavender | July into August | Krul, Nancy & Belle Gardens | .1994 |
| 'Dream Angel' | Yellow | - | - | Unknown | Near-White | June | Laico, Michael | .2003 |
| 'Dream in Blue' | Blue/Green | - | - | Hybrid | Pale-Lavender | - | Anderson, Marlys | --NR-- |
| 'Dream On' | Dark-Green | Medial | White | Nat-Sport | Pale-Lavender | June | Ward, Dr Dick & Jane | .2013 |
| 'Dream Weaver' | Blue/Green | Medial | White | Nat-Sport | Pure-White | June | Ruetenik, Bonnie & Walek, Kevin | .1996 |
| 'Dreamboat Annie' | Med-Green | - | - | Hybrid | Near-White | August to September | Wasitis, Chick | .2011 |
| 'Dreamland' | Med-Green | Marginal | White | Hybrid | Pale-Lavender | July | Malloy, Alex | .2003 |
| 'Dress Blues' | Blue/Green | Marginal | Yellow | Hybrid | Pale-Lavender | August | Zumbar, Wm | .1995 |
| 'Dressed in Green' | Med-Green | - | - | Unknown | Med-Lavender | August to September | Van Eechaute, Danny | .2004 |
| 'Drummer Boy' | Dark-Green | - | - | Hybrid | Pale-Lavender | June into July | Moldovan, Steve | .1983 |
| 'Drunken Boy' | Med-Green | - | - | Unknown | - | - | Van Eechaute, Danny | --NR-- |
| 'Dry Creek Chewbacca' | Dark-Green | Marginal | Yellow | Hybrid | - | - | Geers, Jeanie & Jerry | --NR-- |
| 'Dry Ice' | Blue/Green | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Dubuque Star' | Yellow | - | - | Hybrid | - | - | Husemann, Jim | --NR-- |
| 'Dubuque University Spartans' | Blue/Green | - | - | Unknown | - | June into July | Freeman, Franc | .2011 |
| 'Dumplings with Sauce' | Yellow | - | - | Hybrid | - | - | Balitewicz, Bob | --NR-- |
| 'Dust Devil' | Med-Green | Marginal | Greenish White | TC Sport | Pale-Lavender | July | Zilis, Mark | .1999 |
| 'Dustin' | Med-Green | Marginal | White | Unknown | Pale-Lavender | July into August | Stone, David & Ruh, Peter | .1988 |
| 'Dusty Moon' | Blue/Green | - | - | Nat-Sport | Near-White | June into July | McHugh, Ed | .2012 |
|