| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Registered |
| 'Dark Secret' | Giant | Blue/Green | | | Hybrid | Near-White | June to July | .2009 |
| 'Dark Tower' | Giant | Med-Green | | | Hybrid | Pure-White | Unknown | .1996 |
| 'Darkside' (Ward) | Large | Blue/Green | | | Unknown | Near-White | June to July | --NR-- |
| 'Dawes' | Medium | Dark-Green | Medial | Yellow | Hybrid | Pale-Lavender | July | .2005 |
| 'Delta Blues' | Large | Blue/Green | | | Hybrid | Pale-Lavender | June to July | .2012 |
| 'Don't Look Back' | Small | Med-Green | Streaked | Yellow | Hybrid | Near-White | June to July | .2015 |
| 'Dragonfly' | Miniature | Light-Green | Marginal | White | Hybrid | Unknown | Unknown | .2012 |
| 'Dream On' | Medium | Dark-Green | Medial | White | Sport | Pale-Lavender | June | .2013 |
|