| No. | Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
|
1
| 'Yap Yum' | Large | Med-Green | Marginal | Yellow | Unknown | Pale-Lavender | July into August | Van den Top, Jan | --NR-- |
|
2
| 'Yeet Nine' | Medium | Blue/Green | | | Unknown | | | Ziarek, Ken | --NR-- |
|
3
| 'Yellow Girl' | Medium | Light-Green | | | Unknown | | | Leuckx, Bart | --NR-- |
|
4
| 'Yellow Piecrust' | Medium | Yellow | | | Unknown | | | Ziarek, Ken | --NR-- |
|
5
| 'Yes, Sir!' | Large | Med-Green | - | - | Hybrid | - | July into August | Donsky, George | .2009 |
|
6
| 'Yorick' | Large | Dark-Green | Marginal | Green | Unknown | - | July into August | Squires, Keith & Ruh, Peter & Ruh, Jean | .2005 |
|
7
| 'Yosemite Valley' | Giant | Yellow | - | - | Hybrid | - | - | Petryszyn, Olga | .2010 |
|
8
| 'You Are My Sunshine' | Small | Yellow | | - | Hybrid | Near-White | June into July | Goodwin, Randy | .2019 |
|