| No. | Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'Tall Blue' | | | | | xDuplicate | | | Duplicate Name | |
|
2
| 'Tamiami Blue' | Large | Blue/Green | - | - | Hybrid | Near-White | July into August | Smith, Roger | .2013 |
|
3
| 'Tarheel Blue' | Medium | Blue/Green | - | - | Hybrid | - | - | Solberg, Robert | .2013 |
|
4
| 'The Moon Turned Blue' | Large | Blue/Green | | | Unknown | | | Ziarek, Ken | --NR-- |
|
5
| 'Theo's Blue' | Medium | Blue/Green | - | - | Hybrid | Med-Lavender | - | Zonneveld, Ben & Leydens, Theo | --NR-- |
|
6
| 'Tinker Blue' | Miniature | Blue/Green | - | - | Unknown | - | - | Benedict, Dr Ralph (Herb) & Kuenster, Rod | .2010 |
|
7
| 'Tisch Blue' | Medium | Blue/Green | - | - | Hybrid | - | - | Tisch, Roland | --NR-- |
|
8
| 'TNT Blue' | Small | Blue/Green | | | Unknown | | | Unknown | |
|
9
| 'Tremont Blue Flare' | Medium | Blue/Green | - | - | Unknown | - | - | Livingston, Ron | --NR-- |
|
10
| 'Tremont Blue Magic' | - | - | - | - | Unknown | - | - | Livingston, Ron | --NR-- |
|
11
| 'Tremont Super Blue' | Large | Blue/Green | - | - | Unknown | - | - | Livingston, Ron | --NR-- |
|
12
| 'True Blue' | Large | Blue/Green | - | - | Hybrid | Pure-White | - | Aden, Paul | .1978 |
|
13
| 'Tucker Blues' | Large | Blue/Green | - | - | Hybrid | Pure-White | June | Stephens, Ray | .1990 .2017 |
|
14
| 'Turbo Blue' | Large | Blue/Green | Streaked | Yellow | Unknown | - | - | Elslager, Ed | .2004 |
|