| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Apple Court Gold' | Small | Yellow | - | - | Hybrid | - | - | Grounds, Roger & Grenfell, Diana | --NR-- |
| 'Claudia' | Medium | Med-Green | - | - | Hybrid | Light-Purple | July into August | Grenfell, Diana & Walek, Kevin | .2009 |
| 'Crumples' | Medium | Med-Green | - | - | Hybrid | Pale-Lavender | July | Grenfell, Diana | .1996 |
| 'Domaine De Courson' | Large | Med-Green | - | - | Nat-Sport | Pale-Lavender | July into August | Van Doorslaer & Grenfell, Diana | .1996 |
| 'Hanley Lentinj' | Large | Med-Green | Marginal | White | Unknown | - | - | Grenfell, Diana | --NR-- |
| 'Harvest Moon' | Small | Yellow | Marginal | White | Nat-Sport | Pale-Lavender | July into August | Grenfell, Diana | --NR-- |
| 'Lady Isobel Barnett' | Giant | Med-Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July into August | Grenfell, Diana | .1996 |
| 'Masquerade' | Small | Med-Green | Medial | White | Hybrid | Deep-Purple | June into July | Grenfell, Diana & Walek, Kevin | .2009 .2018 |
| 'Nonsuch' | Giant | Blue/Green | - | - | Unknown | - | June into July | Grenfell, Diana | .1996 |
| 'Primavera Primrose' | Large | Yellow | - | - | Nat-Sport | Pale-Lavender | July into August | Grenfell, Diana | --NR-- |
| 'Prince of Wales' | Giant | Med-Green | - | - | Hybrid | Near-White | June into July | Grenfell, Diana | .2012 |
| 'Silvery Slugproof' | Medium | Blue/Green | - | - | Hybrid | Pale-Lavender | July into August | Grenfell, Diana | .1996 |
| 'St. George's Gold' | Medium | Yellow | - | - | Hybrid | - | - | Grenfell, Diana & Bond, Sandra | --NR-- |
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