| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Abba Diana Reeck' | Medium | Dark-Green | Medial | White | Unknown | Unknown | Unknown | Aden, Paul & Zilis, Mark & The American Hosta Society | .2010 |
| 'Abba Double Header' | Medium | Med-Green | Medial | White | Unknown | Unknown | June to July | Aden, Paul & Zilis, Mark | .2010 |
| 'Abba Flower Mound' | Small | Med-Green | Medial | White | Unknown | Unknown | Unknown | Aden, Paul & Zilis, Mark | .2010 |
| 'Abba Fragrant Backscratcher' | Large | Med-Green | Marginal | White | Unknown | Unknown | Unknown | Aden, Paul & Zilis, Mark | .2010 |
| 'Abba Irresistible' | Medium | Dark-Green | Medial | Creamy Yellow | Unknown | Light-Purple | July to August | Zilis, Mark & The American Hosta Society & Aden, Paul | .2010 |
| 'Abba Ready' | Medium | Med-Green | Marginal | White | Sport | Pale-Lavender | July to August | Zilis, Mark & The American Hosta Society & Aden, Paul | .2010 |
| 'Abba Soul Mate' | Small | Blue/Green | Medial | Blue-Green | Unknown | Unknown | July to August | Aden, Paul & Zilis, Mark | .2010 |
| 'Abba Windows' | Medium | Light-Green | Streaked | Yellow | Sport | Near-White | July to August | Aden, Paul & Zilis, Mark | .2010 |
| 'Abraham Lincoln' | Medium | Blue/Green | | | Hybrid | Light-Purple | June to July | Beilstein, Doug & Zilis, Mark | .2009 |
| 'Afternoon Delight' | Large | Blue/Green | Marginal | Creamy White | Sport | Pale-Lavender | June to July | Zilis, Mark | .2003 |
| 'Aloha' | Medium | Dark-Green | Marginal | Yellow | Sport | Pale-Lavender | August to September | Zilis, Mark & Schwarz, Jim | .2015 |
| 'Amigo' | Large | Blue/Green | Marginal | Yellow | Sport | Pale-Lavender | July to August | Schwarz, Karen & Zilis, Mark | .2014 |
| 'Amy Elizabeth' | Medium | Med-Green | Marginal | Greenish White | Sport | Pale-Lavender | July | Zilis, Mark | .2003 |
| 'Andrew Dennis' | Large | Blue/Green | Marginal | White | Unknown | Unknown | Unknown | Weissenberger, Henry & Zilis, Mark | .2010 |
| 'Angel of Beauty' | Large | Blue/Green | Marginal | Yellow | TC Sport | Near-White | June to July | Zilis, Mark | .2022 |
| 'Anthony' | Large | Yellow | Marginal | Blue-Green | TC Sport | Pale-Lavender | July | Zilis, Mark | .2011 |
| 'Aomori Gold' | Medium | Yellow | | | Sport | Deep-Purple | August to September 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 | Med-Green | | | Sport | Light-Purple | July to August | Zilis, Mark | .2009 |
| 'Aomori Setting Sun' | Medium | Med-Green | Marginal | Yellow | TC Sport | Deep-Purple | August to September to October | Muroya, Kimio & Zilis, Mark | .2009 |
| 'Appalachian Beauty' | Large | Med-Green | Marginal | Yellow | TC Sport | Near-White | June to July | Zilis, Mark | .2003 |
| 'Appletini' | Small | Yellow | | | Hybrid | Light-Purple | August | Zilis, Mark | .2009 |
| 'Archangel' | Medium | Light-Green | | | TC Sport | Pale-Lavender | July | Zilis, Mark | .2003 |
| 'Azure Frills' | Medium | Blue/Green | | | Hybrid | Light-Purple | July to August | Zilis, Mark | .2010 |
| 'Azuretini' | Small | Med-Green | | | Hybrid | Unknown | August to September to October | Zilis, Mark | .2009 |
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