| Giant Size Hostas | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'A 1-A-Day Delight' | Blue/Green | Streaked | Yellow | Hybrid | Near-White | June into July | Elslager, Ed | .2003 |
| 'A Very Good Boy' | Blue/Green | Marginal | White | Hybrid | Near-White | June into July | Elslager, Ed | .2005 |
| 'Abba Blue Prayers' | Blue/Green | - | - | Unknown | - | - | Aden, Paul | --NR-- |
| 'Abiqua Big Sky' | Blue/Green | - | - | Unknown | - | June into July | Purtymun, Charles & Ruh, Peter | .2008 |
| 'Abiqua Elephant Ears' | Blue/Green | - | - | Hybrid | Pale-Lavender | July into August | Purtymun, Charles | .1999 |
| 'Abiqua Gold Shield' | Med-Green | - | - | Hybrid | - | - | Purtymun, Charles | .1987 |
| 'Abiqua Pagoda' | Blue/Green | - | - | Hybrid | Near-White | June into July | Purtymun, Charles | .1989 |
| 'Abiqua Parasol' | Blue/Green | - | - | Hybrid | Near-White | June into July | Purtymun, Charles | .1987 |
| 'Abundant Love' | Blue/Green | - | - | Hybrid | Pure-White | July | Beilstein, Doug & Mardy | .2017 |
| 'Academy Brobdingnagian Viridity' | Med-Green | - | - | Unknown | Near-White | June into July | Chamberlain, Steve | .2000 |
| 'Academy Cratered Blue' | Blue/Green | - | - | Unknown | Near-White | July | Chamberlain, Steve | --NR-- |
| 'Academy Lime Vuvuzela' | Light-Green | - | - | Nat-Sport | Med-Lavender | - | Chamberlain, Steve | .2015 |
| 'Academy Live Vuvuzela' | Light-Green | - | - | Nat-Sport | Pale-Lavender | June into July | Chamberlain, Steve | .2015 |
| 'Academy Shiny Vase' | Med-Green | - | - | Unknown | Pale-Lavender | July into August | Chamberlain, Steve | .2001 |
| 'Aeon' | Dark-Green | Streaked | Yellow | Nat-Sport | Pale-Lavender | June into July | Philips, Hugo | --NR-- |
| 'Agawa' | Blue/Green | - | - | Hybrid | Near-White | July into August | Wade, Van | .2007 |
| 'Aksarben' | Blue/Green | - | - | Hybrid | Near-White | June into July | Geissler, Julia & Ruh, Peter | .1988 |
| 'All This and Heaven Too' | Dark-Green | Streaked | Yellow | Hybrid | Pale-Lavender | July | Elslager, Ed | .2003 |
| 'Allegan Emperor' | Blue/Green | - | - | Hybrid | Pale-Lavender | July | Deshane, H. & Ruh, Peter | .2000 |
| 'Alston Green' | Blue/Green | - | - | Hybrid | Pale-Lavender | June | Stephens, Ray | .1998 |
| 'Am I Blue' | Blue/Green | - | - | Hybrid | Near-White | June into July | Ward, Dr Dick & Jane | .1998 |
| 'American Angel's Fire' | Blue/Green | - | - | Nat-Sport | Near-White | June into July | Wade, Van | --NR-- |
| 'American Aurora Polaris' | Blue/Green | Marginal | Yellow | Nat-Sport | Near-White | June into July | Wade, Van | --NR-- |
| 'American Blue Masterpiece' | Blue/Green | - | - | Unknown | Near-White | - | Wade, Van | --NR-- |
| 'American Blue Wrinkles' | Blue/Green | - | - | Unknown | - | - | Wade, Van | --NR-- |
| 'American Green Quilt' | Dark-Green | - | - | Unknown | - | - | Wade, Van | --NR-- |
| 'American King of the Woods' | Blue/Green | - | - | Hybrid | Near-White | July | Wade, Van | .2007 |
| 'American Majestic' | Med-Green | Medial | White | Nat-Sport | Near-White | June into July | Wade, Van | --NR-- |
| 'American Monster' | Blue/Green | - | - | Hybrid | Near-White | June into July | Wade, Van | --NR-- |
| 'American Pharoah' | Blue/Green | - | - | Unknown | - | - | Wade, Van | --NR-- |
| 'American Ruffled Heart' | Blue/Green | - | - | Hybrid | Pale-Lavender | June into July | Wade, Van | .2000 |
| 'American Yeti' | Blue/Green | - | - | Hybrid | Near-White | July | Wade, Van | .2007 |
| 'Andrew Jackson' | Blue/Green | - | - | Unknown | Near-White | June into July | Sugita, Hajime & Ruh, Peter & Jean | .2001 |
| 'Angel 13' | Blue/Green | - | - | Nat-Sport | Near-White | June into July | Unknown | --NR-- |
| 'Arch Duke' | Blue/Green | - | - | Hybrid | Pale-Lavender | July into August | Lydell, Ransom | .2000 |
| 'Arkansas Lad' | Med-Green | Marginal | White | Hybrid | Near-White | June into July | Metzger, C.D. | .2005 |
| 'Auntie Anne' | Yellow | - | - | Hybrid | Pale-Lavender | June into July | Balitewicz, Bob | --NR-- |
| 'Les Noces d'Argent' | Blue/Green | - | - | Unknown | Near-White | June | Bastille, Jocelyne | --NR-- |
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