| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Abiqua Pagoda' | Giant | Blue/Green | - | - | Hybrid | Near-White | June into July | Purtymun, Charles | .1989 |
| 'Abo Komachi' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Ah-so' | Miniature | - | | - | Unknown | - | - | Unknown | --NR-- |
| 'Aichi' | Medium | Dark-Green | - | - | Sport | Light-Purple | August to September | Unknown | --NR-- |
| 'Akabira Homare' | Small | Med-Green | Marginal | White | Unknown | - | - | Unknown | --NR-- |
| 'Akane' | Medium | Dark-Green | - | - | Unknown | Light-Purple | August to September | Watanabe, Kenji & Hawes, James & Ruh, Peter & Ruh, Jean | .2010 |
| 'Akebono' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Akebono Tokudama' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Akikaze' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Akikaze Gibōshi' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Alcebana Fukurin' | Medium | Med-Green | Marginal | White | Unknown | - | - | Unknown | --NR-- |
| 'Alcebana Kikurin' | Small | Dark-Green | Marginal | White | Unknown | Light-Purple | - | Unknown | --NR-- |
| 'Alcebana Kukurin' | Miniature | Med-Green | Marginal | White | Unknown | Med-Lavender | August to September | Unknown | --NR-- |
| 'Alinghi' | Large | Blue/Green | - | - | Hybrid | Pale-Lavender | August to September | Hirsbrunner, Liselotte | .2003 .2018 |
| 'Amagi Nishiki' | Small | Med-Green | Medial | Yellow | Sport | Light-Purple | September | Sugita, Hajime | --NR-- |
| 'Amagi-kintoki' | Small | Yellow | Marginal | Green | Hybrid | Light-Purple | September | Sugita, Hajime | --NR-- |
| 'Amakazari' | Medium | Dark-Green | - | - | Unknown | - | - | Nakayama, Toyozo | --NR-- |
| 'Amanogawa' | Large | Med-Green | Streaked | Yellow | Unknown | - | - | Wade, Van | --NR-- |
| 'Amanum' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Amanuma' | Small | Med-Green | - | - | Hybrid | Light-Purple | July | Maekawa, Dr Fumio & Ruh, Peter | .2002 |
| 'Amiga Iwa Gibōshi' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Amime Tachi' | Medium | Med-Green | Streaked | Yellow | Sport | Light-Purple | August | Unknown | --NR-- |
| 'Ani Machi' | Medium | Med-Green | Medial | Greenish White | Unknown | Light-Purple | August to September | Ruh, Peter & Ruh, Jean | .2002 .2018 |
| 'Ani Machi Gibōshi' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Aoba Komachi' | Small | Med-Green | - | - | Sport | Light-Purple | July into August | Unknown | --NR-- |
| 'Aoba Omoto Gibōshi' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Aoba Tsugaru Komachi' | - | - | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Aochidori' | - | - | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Aojiku Iwa Giboshi' | - | - | - | - | Duplicate | - | - | Duplicate Name | |
| 'Aojiku Tama-no-Yuki' | - | Med-Green | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Aoki' | Large | Med-Green | - | - | Unknown | Pale-Lavender | July into August | Bailey, Liberty Hyde & The American Hosta Society | .1987 |
| 'Aoki Variegated' | Large | Blue/Green | Marginal | Yellow | Sport | Pale-Lavender | July | Fisher, Eunice V. | --NR-- |
| 'Aomori Gold' | Medium | Yellow | - | - | Sport | Deep-Purple | August to October | Muroya, Kimio & Zilis, Mark | .2009 |
| 'Aomori Gold Star' | Medium | Yellow | Marginal | Green | Sport | Light-Purple | August to September | Muroya, Kimio & Zilis, Mark | .2009 |
| 'Aomori Select' | Medium | Green | - | - | Sport | Light-Purple | July into August | Zilis, Mark | .2009 |
| 'Aomori Setting Sun' | Medium | Med-Green | Marginal | Yellow | Sport | Deep-Purple | August to October | Unknown | --NR-- |
| 'Aomori Sunrise' | Large | Green | Medial | Yellow | Sport | Light-Purple | July into August | Unknown | --NR-- |
| 'Asahi Comet' | Miniature | Med-Green | Marginal | Yellow | Sport | Pale-Lavender | September | Kato, Kiyoshi & Zumbar, Wm | .1984 |
| 'Asahi Star' | Small | Green | Medial | Yellow | Sport | Light-Purple | September to October | Unknown | --NR-- |
| 'Asahi Sunray' | Small | Med-Green | Marginal | Chartreuse | Sport | Pale-Lavender | September | Kato, Kiyoshi & Zumbar, Wm | .1984 |
| 'Asami Improved' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Asuka' | Large | Med-Green | - | - | Unknown | Pure-White | September | Unknown | --NR-- |
| 'Atsuba Gibōshi' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Autumn Wind' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR- |
| 'Aya-gasane' | - | - | Streaked | - | Unknown | - | - | Unknown | --NR-- |
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