| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Registered |
| 'Don't Look Back' | Small | Med-Green | Streaked | Yellow | Hybrid | Near-White | June into July | .2015 |
| 'T Rex' | Giant | Med-Green | - | - | Hybrid | Near-White | June | .1999 |
| 'Taj Mahal' | Large | Med-Green | Medial | White | Hybrid | Near-White | June into July | .2009 |
| 'Temple of Heaven' | Small | Med-Green | Medial | White | Hybrid | - | - | .2012 |
| 'The Godfather' | Giant | Blue/Green | - | - | Unknown | Near-White | August | .1998 |
| 'Thelma Rudolph' | Large | Med-Green | - | - | Unknown | - | - | --NR-- |
| 'Thelonius' | Medium | Blue/Green | - | - | Hybrid | Near-White | July into August | .2009 |
| 'Thumbelina' | Small | Med-Green | Marginal | White | Hybrid | Light-Purple | July | .1996 |
| 'Too Darn Hot' | Medium | Yellow | - | - | Hybrid | Near-White | July | .2009 |
| 'Top Dog' | Medium | Yellow | - | - | Hybrid | - | June into July | .2009 |
| 'Toto' | Small | Med-Green | Marginal | White | Hybrid | - | July into August | .2009 |
| 'Touchdown' | Small | Med-Green | - | - | Hybrid | - | July into August | .2009 |
| 'Tropic Thunder' | Medium | Med-Green | Marginal | Yellow | Hybrid | - | - | .2012 |
| 'Typhoon' | Large | Med-Green | Marginal | Yellow | Nat-Sport | - | June into July | .2010 |
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