| Cultivar Name | Plant Size | Origin | Flower Color | Season | Source | Registered |
| 'Yarden Yellow Snow' | Medium | Hybrid | - | July into August | White, Brian | .2008 |
| 'Yella Bellie' | Large | Unknown | - | - | Goodwin, Randy | --NR-- |
| 'Yellow Belly' | - | Unknown | - | - | Jones, Leonard | --NR-- |
| 'Yellow Bird' | Medium | Hybrid | Pale-Lavender | August | Benedict, Dr Ralph (Herb) | .1991 |
| 'Yellow Blade' | Medium | Sport | - | July into August | Benedict, Dr Ralph (Herb) & Walek, Kevin | .2009 |
| 'Yellow Bonkers' | Medium | Unknown | - | - | Ziarek, Ken | --NR-- |
| 'Yellow Comet' | Medium | Hybrid | Light-Purple | June into July | Graves, Butch | .2008 |
| 'Yellow Dog' | Large | Unknown | Pale-Lavender | June into July | Hicks, Gerry | .2017 |
| 'Yellow Duckling' | Miniature | Unknown | - | - | Unknown | --NR-- |
| 'Yellow Emperor' | Large | Hybrid | Near-White | June into July | Savory, Robert | .1987 |
| 'Yellow Eyes' | Small | Sport | Light-Purple | July | Ruh, Peter | .1999 |
| 'Yellow Fever' | Medium | Hybrid | Near-White | July | Goodwin, Randy | .2009 |
| 'Yellow Heron' | Medium | Unknown | - | - | Owens, Clarence | --NR-- |
| 'Yellow High' | Large | Duplicate | - | - | Owens, Clarence | .1990 |
| 'Yellow Highness' | Large | Hybrid | - | - | Owens, Clarence | .1990 |
| 'Yellow Imperial Banner' | Large | Unknown | - | - | Unknown | --NR-- |
| 'Yellow Kid' | Small | Hybrid | - | - | Malloy, Alex | --NR-- |
| 'Yellow Ledbetter' | Large | Unknown | Med-Lavender | - | Sanford, Matt | --NR-- |
| 'Yellow Lollipop' | Medium | Unknown | - | - | Hawes, James | --NR-- |
| 'Yellow Moon Rising' | Large | Unknown | - | - | Ziarek, Ken | --NR-- |
| 'Yellow Needle' | Miniature | Unknown | - | - | Livingston, Ron | --NR-- |
| 'Yellow Prize' | Small | Hybrid | - | - | Kuenster, Rod | .2008 |
| 'Yellow Ribbons' | Small | Sport | Med-Lavender | July | Engel, Karen | .1999 |
| 'Yellow Ruffles' | Large | Unknown | - | - | Livingston, Ron | --NR-- |
| 'Yellow Smiles' | Small | Unknown | Med-Lavender | - | Livingston, Ron | --NR-- |
| 'Yellow Spot' | Medium | Sport | Light-Purple | July | South Africa | --NR-- |
| 'Yellow Spring' | Medium | Unknown | - | - | Plater-Zyberk, Maria | --NR-- |
| 'Yellow Strike' | - | Unknown | - | - | Unknown | --NR-- |
| 'Yellow Submarine' | Small | Unknown | Light-Purple | August | O'Harra, Russ & Walek, Kevin | .2009 |
| 'Yellow Surprise' | Medium | Hybrid | - | - | Fisher, Eunice V. & Hensen, Karel | .1983 |
| 'Yellow Swoosh' | Large | Unknown | - | - | Livingston, Ron | --NR-- |
| 'Yellow Tears' | Small | Hybrid | - | - | Zonneveld, Ben | --NR-- |
| 'Yellow Waves' | Small | Hybrid | Light-Purple | August | Aden, Paul | .1978 |
| 'Yellow Wedgwood' | Small | Unknown | - | - | Unknown | --NR-- |
| 'Yellow Yeti' | Giant | Unknown | - | - | Carlson, Monty & Carlson, Julie | --NR-- |
| 'Yesterday's Corn' | Small | Unknown | - | - | Unknown | --NR-- |
| 'Yosemite Valley' | Giant | Hybrid | - | - | Petryszyn, Olga | .2010 |
| 'Yukon Gold' | Medium | Hybrid | Pale-Lavender | July into August | Ward, Dr Dick & Ward, Jane | .2015 |
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