| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Taco Chips' | Large | Yellow-Gold | | - | Unknown | Near-White | July | Goodwin, Randy | .2020 |
| 'Tangerine' | Medium | Yellow | - | - | Hybrid | Pale-Lavender | July | Elslager, Ed | .1998 |
| 'Tardiflora Honey Glaze' | Small | Yellow | - | - | Sport | Med-Lavender | August to October | Unknown | --NR-- |
| 'TBSP Butter' | Miniature | Yellow-Gold | | | Hybrid | Light-Purple | June into July | Dye, Kay | .2021 |
| 'Tea and Crumpets' | Small | Med-Green | Marginal | Creamy White | Hybrid | Light-Purple | July | Lachman, Wm & Lachman, Eleanor & Walek, Kevin & The American Hosta Society | .2009 |
| 'Tea at Bettys' | Small | Med-Green | Marginal | Yellow | Sport | Light-Purple | July into August | Ford, Richard & Ford, Mary | .2009 |
| 'Tea Biscuit' | Medium | Light-Green | - | - | Unknown | Pure-White | July | Lydell, Ransom | --NR-- |
| 'Tea Dance' | Small | Med-Green | Marginal | White | Unknown | - | - | Terpening, Kent | --NR-- |
| 'Teatime' | Medium | Blue/Green | Marginal | Yellow | Sport | Pale-Lavender | July into August | Zilis, Mark | .2006 |
| 'Tentacles' | Medium | Med-Green | - | - | Hybrid | Pale-Lavender | August | Seaver, Charles | .1996 |
| 'Tequila Sunrise' | Medium | Yellow | - | - | Hybrid | - | - | Johnson, Greg | .2004 |
| 'The High Life' | Medium | Yellow | Marginal | Green | TC Sport | Pale-Lavender | July into August | Barta, Jack & Micheletti, Tom & Zilis, Mark | .2012 |
| 'Tic Tac' | Miniature | Med-Green | Medial | White | Hybrid | Med-Lavender | July | Johnson, Greg | .2004 |
| 'Toasted Cheese' | Large | Med-Green | Marginal | Yellow | Sport | - | July into August | Unknown | --NR-- |
| 'Top Banana' | Medium | Med-Green | Medial | White | Hybrid | Pale-Lavender | July | Vaughn, Kevin | .1983 |
| 'Top Brass' | Giant | Yellow | - | - | Hybrid | Med-Lavender | June into July | Gilligan, Madelon | .2013 |
| 'Tortilla Chip' | Medium | Yellow | - | - | TC Sport | Pale-Lavender | July into August | Solberg, Robert | .2002 |
| 'Tossed Salad' | Large | Dark-Green | - | - | Hybrid | - | July into August | Vaughn, Kevin & Walek, Kevin & The American Hosta Society | .2009 |
| 'Tremont Frosted Flakes' | - | Blue/Green | - | - | Unknown | - | - | Livingston, Ron | --NR-- |
| 'Tremont Spice' | Medium | Med-Green | Marginal | Yellow | Unknown | Med-Lavender | - | Livingston, Ron | --NR-- |
| 'Tupelo Honey' | Large | Yellow | - | - | Unknown | - | June into July | Wasitis, Chick | .2011 |
| 'Tutti-fruiti' | Small | Med-Green | Streaked | Speckles | Hybrid | - | - | Elslager, Ed | .2000 |
| 'Twist of Lime' | Small | Yellow | Marginal | Greenish White | Sport | Light-Purple | July | Solberg, Robert | .1991 |
| 'Twisted Spearmint' | Medium | Dark-Green | Medial | White | Hybrid | Pale-Lavender | July into August | Heemskerk, Gerardus | .2021 |
| 'Twizzler' | Medium | Blue/Green | - | - | Hybrid | Light-Purple | July into August | Elchuk, Kevin & Elchuk, Olga | .2015 |
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