| Large Size Hostas | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'A B-1 Bomber' | Dark-Green | Streaked | Yellow | Hybrid | Pale-Lavender | July into August | Elslager, Ed | .2002 |
| 'A Big Splash' | Blue/Green | Streaked | Yellow | Hybrid | Pale-Lavender | July | Elslager, Ed | .2004 |
| 'A Blue Streak' | Dark-Green | Streaked | Greenish Yellow | Hybrid | - | - | Elslager, Ed | .2001 |
| 'A Burgh Thing' | Blue/Green | - | - | Unknown | - | June into July | Danik, Robert and K. | .2009 |
| 'A Step Beyond' | Blue/Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July | Lysne, Rod | .2019 |
| 'Aardvark' | Light-Green | Medial | Blue-Green | Hybrid | Near-White | July into August | Savory, Dennis | .1991 |
| 'Abba Aloft' | Med-Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July into August | Aden, Paul | .1990 |
| 'Abba Assuage' | Yellow | Marginal | White | Unknown | - | - | Aden, Paul | --NR-- |
| 'Abba at Large' | Yellow | Marginal | Green | Nat-Sport | Pale-Lavender | July into August | Aden, Paul | .1990 |
| 'Abba Blue Jumbo' | Blue/Green | Marginal | White | Unknown | - | - | Aden, Paul | --NR-- |
| 'Abba Blue Plus' | Blue/Green | Marginal | White | Unknown | - | August to September | Aden, Paul | .1990 |
| 'Abba Dabba Do' | Dark-Green | Marginal | Greenish White | Nat-Sport | Pale-Lavender | July into August | Avent, Tony | .1998 |
| 'Abba Dabba Do Gold' | Yellow | - | - | Nat-Sport | Pale-Lavender | July | Wade, Van | --NR-- |
| 'Abba Dabba Don't' | Light Yellow | Marginal | Green | Nat-Sport | Pale-Lavender | July | Summers, Alex | --NR-- |
| 'Abba Dabba Wow' | Med-Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | June into July | Van Hoorn, James | --NR-- |
| 'Abba Dew' | Light-Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July | Brill, Kirk | .1999 |
| 'Abba Fragrant Backscratcher' | Med-Green | Marginal | White | Unknown | - | - | Aden, Paul & Zilis, Mark | .2010 |
| 'Abba Lilian Cannon' | Med-Green | Streaked | White | Nat-Sport | Light-Purple | July | Wade, Van | --NR-- |
| 'Abba Passion' | Med-Green | Medial | Yellow | Unknown | - | - | Aden, Paul | --NR-- |
| 'Abba Spellbinder' | Blue/Green | Marginal | Chartreuse | Unknown | Pure-White | July | Aden, Paul | .1990 |
| 'Abba What' | Med-Green | Marginal | Yellow | Unknown | - | - | Wrede, Arthur | --NR-- |
| 'Abbey Pond Cascades' | Med-Green | - | - | Hybrid | Pale-Lavender | June into July | Malloy, Alex | .2004 |
| 'Abiqua Ambrosia' | Med-Green | - | - | Unknown | Pale-Lavender | July into August | Purtymun, Charles | .1987 |
| 'Abiqua Blue Shield' | Blue/Green | - | - | Unknown | Near-White | June into July | Purtymun, Charles | .1988 |
| 'Abiqua Drinking Gourd' | Blue/Green | - | - | Hybrid | Near-White | June into July | Purtymun, Charles | .1989 |
| 'Abiqua Drinking Gourd Streaked' | Blue/Green | Streaked | Yellow | Nat-Sport | Near-White | June into July | Meyer, Bill | --NR-- |
| 'Abiqua Falls' | Med-Green | - | - | Unknown | - | - | Purtymun, Charles | --NR-- |
| 'Abiqua Gold Star' | Light-Green | - | - | Unknown | Near-White | - | Purtymun, Charles | --NR-- |
| 'Abiqua Golden Boy' | Yellow | - | - | Unknown | - | - | Purtymun, Charles | --NR-- |
| 'Abiqua Kaleidoscope' | Dark-Green | Medial | Yellow | Unknown | - | June into July | Purtymun, Charles & Walek, Kevin | .2009 |
| 'Abiqua Recluse' | Yellow | - | - | Hybrid | Near-White | June into July | Purtymun, Charles | .1989 |
| 'Abiqua Solitude' | Med-Green | - | - | Unknown | - | - | Purtymun, Charles | --NR-- |
| 'Abiqua Zodiac' | Yellow | - | - | Unknown | Light-Purple | July into August | Purtymun, Charles | .1988 |
| 'Academy Ametrine' | Yellow | - | - | Hybrid | Light-Purple | June into July | Chamberlain, Steve | .2005 |
| 'Academy Blue Borealis' | Blue/Green | - | - | Unknown | - | - | Chamberlain, Steve | --NR-- |
| 'Academy Blue Funnel' | Blue/Green | - | - | Unknown | Pale-Lavender | June into July | Chamberlain, Steve | .2008 |
| 'Academy Blue Titan' | Blue/Green | - | - | Unknown | Pure-White | June | Chamberlain, Steve | .1999 |
| 'Academy Celeborn' | Blue/Green | - | - | Hybrid | Pure-White | July | Chamberlain, Steve | .2000 |
| 'Academy Fangorn Forest' | Med-Green | - | - | Hybrid | Light-Purple | August to September | Chamberlain, Steve | .2003 |
| 'Academy Flaxen Spades' | Light-Green | - | - | Hybrid | Pale-Lavender | July into August | Chamberlain, Steve | .2002 |
| 'Academy Gilded Dawn' | Yellow | - | - | Hybrid | Pale-Lavender | July into August | Chamberlain, Steve | .2008 |
| 'Academy Glowing Embers' | Yellow | Marginal | Yellow | Nat-Sport | Med-Lavender | July into August | Chamberlain, Steve | .2008 |
| 'Academy Green Bid Paddles' | Dark-Green | - | - | Hybrid | Med-Lavender | July into August | Chamberlain, Steve | .2015 |
| 'Academy Halo Standard' | Light-Green | Marginal | White | Nat-Sport | Pale-Lavender | July into August | Chamberlain, Steve | .2015 |
| 'Academy Isengard' | Med-Green | - | - | Hybrid | Light-Purple | July into September | Chamberlain, Steve | .2003 |
| 'Academy Lothlórien' | Yellow | - | - | Hybrid | Pale-Lavender | July into August | Chamberlain, Steve | .2004 |
| 'Academy Mallorn' | Med-Green | - | - | Hybrid | Pale-Lavender | July into August | Chamberlain, Steve | .2003 |
| 'Academy Palantir' | Med-Green | - | - | Hybrid | Pale-Lavender | July into August | Chamberlain, Steve | .2000 |
| 'Academy Redundant' | Med-Green | Marginal | White | Nat-Sport | Pale-Lavender | July | Chamberlain, Steve | .1998 |
| 'Academy Resplendent Froufrou' | Med-Green | - | - | Hybrid | Near-White | June into July | Chamberlain, Steve | .2011 |
| 'Academy Rivendell' | Med-Green | - | - | Hybrid | Med-Lavender | July into August | Chamberlain, Steve | .2005 |
| 'Academy Soaring Rugosity' | Med-Green | - | - | Hybrid | Pale-Lavender | July into August | Chamberlain, Steve | .2015 |
| 'Academy Streaked Francee' | Dark-Green | Streaked | White | Nat-Sport | Med-Lavender | July into August | Chamberlain, Steve | --NR-- |
| 'Academy Tousled Turkey' | Blue/Green | - | - | Hybrid | Med-Lavender | June into July | Chamberlain, Steve | .2001 |
| 'Academy Wonky Balderdash' | Med-Green | - | - | Hybrid | Near-White | June into July | Chamberlain, Steve | .2006 |
| 'Academy Yellow Vuvuzela' | Yellow | - | - | Unknown | Pale-Lavender | July | Chamberlain, Steve | .2015 |
| 'Admiral Halsey' | Dark-Green | Marginal | White | Nat-Sport | Med-Lavender | June into July | Wasitis, Chick & Walek, Kevin | .2009 |
| 'After Midnight' | Blue/Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | June into July | Solberg, Robert | .2009 |
| 'Afterglow' (Livingston) | Dark-Green | Marginal | Yellow | Hybrid | - | - | Livingston, Ron | --NR-- |
| 'Afterglow' (Walters) | Dark-Green | Marginal | Yellow | TC Sport | Pale-Lavender | June into July | Lichacz, Susan & Walters Gardens | .2012 |
| 'Afternoon Delight' | Blue/Green | Marginal | Creamy White | Nat-Sport | Pale-Lavender | June into July | Zilis, Mark | .2003 |
| 'Age of Gold' | Yellow-Gold | - | - | Hybrid | Near-White | July into August | Hansen, Hans & Walters Gardens, Inc | .2018 |
| 'Aggressive Behavior' | Blue/Green | Marginal | White | Unknown | - | - | Kuenster, Rod | --NR-- |
| 'Ahamo Gold' | Yellow | - | - | Unknown | Pale-Lavender | July | Geissler, Julia | .1970 |
| 'Ahwaneeh' | Light-Green | - | - | Hybrid | Pure-White | July into August | Syre-Herz, Ursula | .1990 |
| 'Alabama Bowl' | Blue/Green | - | - | Hybrid | Near-White | July | Suggs, Natalee | .1986 |
| 'Alabama Gold' | Yellow | - | - | Hybrid | Pale-Lavender | June into July | Suggs, Natalee | .1986 |
| 'Alabama Sunrise' | Light-Green | - | - | Unknown | - | - | Solberg, Robert | .2011 |
| 'Alan Titmarsh' | Med-Green | Medial | Yellow | Nat-Sport | Pale-Lavender | July into August | Ford, Richard & Mary | .2006 |
| 'Alaskan Halo' | Med-Green | Marginal | White | Nat-Sport | Pale-Lavender | July into August | Ruh, Peter | .1997 |
| 'Albert Lea' | Blue/Green | - | - | Nat-Sport | Near-White | June into July | Ruh, Peter | .1999 |
| 'Aldonna Blue Eyes' | Blue/Green | - | - | Unknown | - | - | Wade, Van | --NR-- |
| 'Alex Summers' | Blue/Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | June into July | Santa Lucia, Vic | .1989 |
| 'Algonquin' | Blue/Green | - | - | Hybrid | Near-White | June into July | Wade, Van | .2007 |
| 'Alice Gladden' | Yellow | - | - | Hybrid | Near-White | June into July | Ward, Dr Dick & Jane | .1998 |
| 'Alinghi' | Blue/Green | - | - | Hybrid | Pale-Lavender | August to September | Hirsbrunner, Liselotte | .2003 .2018 |
| 'Alison' | Yellow | - | - | Hybrid | Pale-Lavender | June into July | Ward, Dr Dick & Jane | .2000 |
| 'All Aflutter' | Dark-Green | Streaked | White | Unknown | Med-Lavender | - | Stegeman, Bev & Dave | --NR-- |
| 'All Gold Gin and Tonic' | Light-Green | - | - | Nat-Sport | Near-White | July | Unknown | --NR-- |
| 'All Green Gin and Tonic' | Med-Green | - | - | Nat-Sport | Near-White | July | Wade, Van | --NR-- |
| 'All Rise' | Blue/Green | Medial | Yellow | Unknown | - | - | Serafin, Viktoria | --NR-- |
| 'All That Jazz' | Dark-Green | Marginal | White | Hybrid | Pure-White | July into August | Petryszyn, Olga | .2006 |
| 'Allegan Gent' | Blue/Green | Marginal | Speckles | Nat-Sport | Near-White | June into July | Herrema, Ken & Ruh, Peter | .2000 |
| 'Allen C. Haskell' | Dark-Green | Streaked | Yellow | Unknown | Pale-Lavender | July | Seaver, Mildred & Walek, Kevin | .2009 |
| 'Alleyne Cook' | Blue/Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July into August | Cook, Alleyne & Hodgson, D. | .2003 |
| 'Alliteration' | Med-Green | Streaked | Yellow | Hybrid | - | - | Lysne, Rod | --NR-- |
| 'Alphabet Soup' | Light-Green | - | - | Hybrid | Near-White | June into July | Gilligan, Madelon | .2013 |
| 'Alpine Ice' | Med-Green | Marginal | White | Nat-Sport | Near-White | July into August | Green Mountain Hosta | --NR-- |
| 'Alter Ego' | Yellow | - | - | Hybrid | - | July | Livingston, Ron | --NR-- |
| 'Alvatine Taylor' | Blue/Green | Marginal | Yellow | Nat-Sport | Pure-White | June into July | Minks, Eldren | .1990 |
| 'Amanogawa' | Med-Green | Streaked | Yellow | Unknown | - | - | Wade, Van | --NR-- |
| 'Amazing Matthew' | Med-Green | Marginal | White | Nat-Sport | Pale-Lavender | June into July | Asch, Stuart | .2003 |
| 'Amber' | Med-Green | Streaked | Yellow | Unknown | - | - | Unknown | --NR-- |
| 'Amber Glass' | Yellow | - | - | TC Sport | Pale-Lavender | August | Anderson, Jim | --NR-- |
| 'Amber Waves' | Yellow | - | - | Hybrid | - | - | Minks, Eldren | --NR-- |
| 'Amber Waves of Grain' | Med-Green | Marginal | Yellow | Hybrid | Pale-Lavender | July into August | Elslager, Ed | .2003 |
| 'Ambrosia' | Blue/Green | Medial | Yellow | Nat-Sport | Pale-Lavender | July into August | Solberg, Robert | .2016 |
| 'American Angel' | Blue/Green | Medial | White | Nat-Sport | Near-White | July | Wade, Van, Schroeder, Bob & Barb | .2017 |
| 'American Blue Guardian' | Blue/Green | Medial | White | Nat-Sport | Near-White | July | Wade, Van | --NR-- |
| 'American Blue Hearts' | Blue/Green | - | - | Unknown | Near-White | June into July | Wade, Van | --NR-- |
| 'American Choice' | Med-Green | Marginal | Greenish White | TC Sport | Pure-White | July into August | Wade, Van | .2007 |
| 'American Choo Choo' | Med-Green | - | - | Nat-Sport | Pale-Lavender | July | Wade, Van | --NR-- |
| 'American Dark Angel' | Dark-Green | - | - | Nat-Sport | Near-White | June into July | Wade, Van | .1999 |
| 'American Eagle' | Blue/Green | Marginal | Gold | Nat-Sport | Pale-Lavender | June into July | Wade, Van | .1999 |
| 'American Emerald' | Med-Green | - | - | Unknown | - | - | Wade, Van | --NR-- |
| 'American Fashion' | Yellow | Marginal | Green | Nat-Sport | Pale-Lavender | July into August | Wade, Van | --NR-- |
| 'American Gladiator' | Blue/Green | Marginal | Yellow | Hybrid | Near-White | June into July | Hansen, Hans | .2007 |
| 'American Glory Be' | Blue/Green | Medial | Yellow | Nat-Sport | Light-Purple | June into July | Wade, Van | .1999 |
| 'American Gold Heart' | Light-Green | - | - | Unknown | - | - | Wade, Van | --NR-- |
| 'American Green Angel' | Med-Green | - | - | Nat-Sport | Near-White | June into July | Wade, Van | --NR-- |
| 'American Halo' | Blue/Green | Marginal | Creamy White | Nat-Sport | Pure-White | June into July | Wade, Van | .1999 |
| 'American Icon' | Med-Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July | Hansen, Hans & Shady Oaks Nursery | .2004 |
| 'American Louigi' | Blue/Green | Streaked | White | Nat-Sport | Near-White | June into July | Wade, Van | --NR-- |
| 'American Majestic Blue' | Blue/Green | - | - | Unknown | Near-White | - | Wade, Van | --NR-- |
| 'American Masterpiece' | Blue/Green | Medial | White | Nat-Sport | Near-White | June into July | Wade, Van | .1999 |
| 'American Misty' | Blue/Green | Medial | Greenish White | Nat-Sport | Near-White | July into August | Wade, Van | .2005 |
| 'American Mohican Halo' | Blue/Green | Marginal | White | Nat-Sport | Near-White | June into July | Wade, Van | .2000 |
| 'American Mom No.2' | Light-Green | - | - | Unknown | - | - | Wade, Van | --NR-- |
| 'American Piecrust' | Med-Green | - | - | Unknown | - | - | Wade, Van | --NR-- |
| 'American Ruffles' | Blue/Green | - | - | Unknown | Near-White | July | Wade, Van | --NR-- |
| 'American Sonata' | Med-Green | Medial | Yellow | Nat-Sport | Pale-Lavender | August | Wade, Van | --NR-- |
| 'American Super Elegans' | Blue/Green | - | - | Hybrid | Near-White | - | Wade, Van | --NR-- |
| 'American Sweetheart' | Dark-Green | Medial | White | Nat-Sport | Pale-Lavender | July into August | Hansen, Hans | .2002 |
| 'American Thunderbolt' | Med-Green | Medial | Yellow | Unknown | - | - | Wade, Van | --NR-- |
| 'American Tisch Breeder' | Blue/Green | Streaked | Speckles | Nat-Sport | Near-White | June into July | Wade, Van & Elslager, Ed | .2002 |
| 'Amigo' | Blue/Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July into August | Schwarz, Karen & Zilis, Mark | .2014 |
| 'Amos' | Blue/Green | - | - | Hybrid | Near-White | June into July | Petryszyn, Olga | --NR-- |
| 'Amplissima' | Med-Green | - | - | Unknown | Pale-Lavender | - | Unknown | --NR-- |
| 'Ancient Mariner' | Blue/Green | Streaked | Yellow | Unknown | - | - | Goodenough, Rick | --NR-- |
| 'Andrew' | Blue/Green | Medial | White | Nat-Sport | Near-White | June into July | Hansen, Hans | .2006 |
| 'Andrew Dennis' | Blue/Green | Marginal | White | Unknown | - | - | Weissenberger, Henry & Zilis, Mark | .2010 |
| 'Andrew's Bald' | Blue/Green | Streaked | Yellow | Unknown | - | - | Moore, Jeff | --NR-- |
| 'Android' | Yellow | Marginal | Green | Nat-Sport | Pale-Lavender | - | Fransen, Marco | --NR-- |
| 'Angel Eyes' | Med-Green | Streaked | Blue-Green | Nat-Sport | Near-White | June into July | Wasitis, Chick & Walek, Kevin | .2009 |
| 'Angel Falls' | Dark-Green | Medial | Chartreuse | Nat-Sport | - | - | Hansen, Hans & Walters Gardens | --NR-- |
| 'Angel Harp Strings' | Blue/Green | Streaked | Yellow | Nat-Sport | Near-White | June into July | Elslager, Ed | .2005 |
| 'Angel of Beauty' | Blue/Green | Marginal | Yellow | TC Sport | Near-White | June into July | Zilis, Mark | --NR-- |
| 'Angel Wings' | Med-Green | - | - | Unknown | Pale-Lavender | June into July | Diesen, Jane & Bernie | .1998 |
| 'Angie's Dimples' | Dark-Green | - | - | Nat-Sport | - | August to September | Milbradt, Marc | .2009 |
| 'Ann Kulpa' | Med-Green | Medial | White | Hybrid | Near-White | July into August | Kulpa, John | .1999 |
| 'Anna Rosemary' | Dark-Green | Medial | Yellow | Unknown | - | - | Parks, David | --NR-- |
| 'Anthony' | Yellow | Marginal | Blue-Green | TC Sport | Pale-Lavender | July | Zilis, Mark | .2011 |
| 'Antioch' | Med-Green | Marginal | Creamy White | Hybrid | Pale-Lavender | July into August | Tompkins, Cynthia & Hofer, Paul & Ruh, Peter | .1979 |
| 'Aoki' | Med-Green | - | - | Unknown | Pale-Lavender | July into August | Bailey, Liberty Hyde & AHS | .1987 |
| 'Aoki Variegated' | Blue/Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July | Fisher, Eunice V. | --NR-- |
| 'Aomori Sunrise' | Green | Medial | Yellow | Nat-Sport | Light-Purple | July into August | Unknown | --NR-- |
| 'Aphrodite' | Med-Green | - | - | Nat-Sport | Pure-White | August to October | Maekawa, Dr Fumio, Schmid, W. & Walek, Kevin | .2009 |
| 'Apollo' (Syre-Herz) | Yellow | - | - | Hybrid | Light-Purple | July | Syre-Herz, Ursula | --NR-- |
| 'Appalachian Beauty' | Med-Green | Marginal | Yellow | TC Sport | Near-White | June into July | Zilis, Mark | .2003 |
| 'Applause' | Med-Green | Marginal | Yellow | Nat-Sport | Light-Purple | June into July | Hansen, Hans | .2006 |
| 'Apple Pie' | Med-Green | - | - | Unknown | - | - | Smith, Eric | --NR-- |
| 'Aqua Duchess' | Blue/Green | - | - | Hybrid | - | - | Lydell, Ransom | --NR-- |
| 'Aqua Velva' | Blue/Green | - | - | Hybrid | Pale-Lavender | July into August | Vaughn, Kevin | .1983 |
| 'Arapaho' | Blue/Green | - | - | Unknown | - | - | Wade, Van | --NR-- |
| 'Arc de Triomphe' | Blue/Green | Marginal | Creamy White | Hybrid | Pale-Lavender | July into August | Elslager, Ed | .2000 |
| 'Arctic Frost' | Blue/Green | Streaked | Speckles | Nat-Sport | Pale-Lavender | August to October | Trucks, Gary | --NR-- |
| 'Arctic Storm' | Dark-Green | Streaked | Yellow | Unknown | - | - | Ternes, Nick | --NR-- |
| 'Arett's Wonder' | Blue/Green | - | - | Hybrid | Pale-Lavender | June into July | Arett, Anne & AHS | .1986 |
| 'Armani' | Dark-Green | - | - | Hybrid | - | July into August | Van Eechaute, Danny | .2015 |
| 'Arnold Black' | Yellow | - | - | Hybrid | Pale-Lavender | June into July | Ward, Dr Dick & Jane | .2004 |
| 'Arrow Head' | Med-Green | Streaked | Yellow | Unknown | - | - | Tompkins, Chet | --NR-- |
| 'Artemis' | Light-Green | - | - | Unknown | - | June into July | Donahue, Thomas & Malloy, Alex | .2001 |
| 'Asagiri Ōba' | Med-Green | Streaked | White | Nat-Sport | Pale-Lavender | July | Unknown | --NR-- |
| 'Ascension' | Med-Green | Marginal | White | Unknown | - | - | Asch, Stuart | --NR-- |
| 'Asher' | Blue/Green | - | - | Hybrid | Near-White | July into August | Kwick, Charles | .2017 |
| 'Aspen Gold' | Yellow | - | - | Hybrid | Near-White | June into July | Grapes, Vivian | .1986 |
| 'Asuka' | Med-Green | - | - | Unknown | Pure-White | September | Unknown | --NR-- |
| 'At Ease' | Dark-Green | - | - | Unknown | - | - | Unknown | --NR-- |
| 'At the Ritz' | Med-Green | Streaked | Yellow | Unknown | Pale-Lavender | July | Janssen, Bill | --NR-- |
| 'Atlantis' | Blue/Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | June into July | Hansen, Hans & Avent, Tony | .2004 |
| 'Audra Wilson' | Med-Green | Streaked | Yellow | Unknown | - | - | Benedict, Dr Ralph (Herb) | --NR-- |
| 'August Beauty' | Dark-Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July into August | Warmerdam, Piet & Walek, Kevin | .2009 |
| 'August Emerald' | Dark-Green | - | - | Nat-Sport | Pale-Lavender | July into August | Wade, Van | --NR-- |
| 'August Moon' | Yellow | - | - | Unknown | Pale-Lavender | July into August | Langfelder, Richard & Ruh, Peter | .1996 |
| 'August Moon Green' | Med-Green | - | - | Nat-Sport | Pale-Lavender | July into August | Wade, Van | --NR-- |
| 'August Moonlight' | Light-Green | Medial | White | Unknown | - | - | Anderson, Kenneth | --NR-- |
| 'Aunt Bea' (Tompkins) | Med-Green | - | - | Unknown | - | - | Tompkins, Cynthia | --NR-- |
| 'Aunt Margaret's' | Dark-Green | - | - | Unknown | Light-Purple | July | Soper, Jim | --NR-- |
| 'Auntie Lucille' | Light-Green | - | - | Unknown | - | - | Skaggs, Virginia & Brian | --NR-- |
| 'Aureomarginata', H montana | Med-Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July | Maekawa, Dr Fumio & AHS | .1986 |
| 'Aureomarginata', H ventricosa | Dark-Green | Marginal | White | Nat-Sport | Light-Purple | July | Hensen, Karel & Bloom, Alan & AHS | .1986 |
| 'Aurora Borealis' | Blue/Green | Marginal | Yellow | Nat-Sport | Near-White | June into July | Rudolph, Thelma & Walters Gardens | .1986 |
| 'Aurora Green' | Med-Green | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Autumn Fire' | Yellow | - | - | Unknown | - | - | Duncan, Mary Jo | .2014 |
| 'Autumn Frost' | Yellow | Medial | Green | TC Sport | Pale-Lavender | July into August | Lichacz, Susan & Walters Gardens | .2009 |
| 'Autumn Joy' | Med-Green | - | - | Unknown | - | August to September | Benedict, Dr R. (Herb) & Kuenster, Rod | .2010 |
| 'Autumn Moon' | Yellow | - | - | Unknown | Pale-Lavender | July | Unknown | --NR-- |
| 'Avocado' | Med-Green | Medial | Yellow | Nat-Sport | Pale-Lavender | July into August | Diesen, Bernie & Jane | .1998 |
| 'Awe Snap' | Med-Green | Marginal | White | Nat-Sport | Pure-White | July into August | Giese, M & K | .2019 |
| 'Awesome Illusion' | Dark-Green | Streaked | Speckles | Nat-Sport | Light-Purple | June into July | Xavier-Sakr, Suzzane | .2002 |
| 'Aztec Treasure' | Yellow | - | - | Hybrid | Light-Purple | June into July | Vaughn, Kevin | .1987 |
| 'Azure Frost' | Blue/Green | - | - | Unknown | Near-White | June into July | Treichel, Bernie | .2006 |
| 'Azure Mediterranean' | Med-Green | - | - | Unknown | Pale-Lavender | July into August | Helsley, Calvin | .1999 |
| 'Azure Snow' | Blue/Green | - | - | Hybrid | Pale-Lavender | August to October | Ruh, Peter | .1991 |
|