| Cultivar Name | Source | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Registered |
| 'A Dash of Lemon' | Walker, O. & Potts, C. | Medium | Light-Green | Marginal | Yellow | Unknown | Pale-Lavender | June into July | .2020 |
| 'Alan Titmarsh' | Ford, Richard & Mary | Large | Med-Green | Medial | Yellow | Sport | Pale-Lavender | July into August | .2006 |
| 'Andy Murray' | BHHS & Solberg, Robert | Medium | Blue/Green | Marginal | Yellow | Hybrid | Pale-Lavender | July into August | .2013 |
| 'Anthony Gattrell' | Unknown | - | Med-Green | - | - | Unknown | - | - | --NR-- |
| 'Anticipation' | Bond, John | - | Med-Green | - | - | Hybrid | - | - | --NR-- |
| 'Apollo' (England) | Unknown | - | - | - | - | Unknown | - | - | --NR-- |
| 'Apple Court Gold' | Grounds, Roger & Grenfell, Diana | Small | Yellow | - | - | Hybrid | - | - | --NR-- |
| 'Apple Pie' | Smith, Eric | Large | Med-Green | - | - | Unknown | - | - | --NR-- |
| 'Aureomarginata', H. ventricosa | Hensen, Karel & Bloom, Alan & AHS | Large | Dark-Green | Marginal | White | Sport | Light-Purple | July | .1986 |
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