| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Sacra' | Medium | - | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Sagittarius' | Large | Light-Green | - | - | Hybrid | - | June into July | Husemann, Jim | .2009 |
| 'Saint Sebastian' | Medium | Med-Green | - | - | Hybrid | Med-Lavender | August to September | Zolock, Steve & Sarah | .2011 |
| 'Salty Blue' | Medium | Blue/Green | - | - | Hybrid | Pure-White | August | Nyikos, Frank | .2011 |
| 'Salus' | Small | Yellow | - | - | Unknown | - | July into August | Malloy, Alex | .2004 |
| 'Sam Hagerman' | Giant | Dark-Green | - | - | Hybrid | - | June into July | Kwick, Charles | .2016 |
| 'Samurai' | Large | Blue/Green | Marginal | Yellow | Nat-Sport | Near-White | June into July | Unknown & Zilis, Mark | .2010 |
| 'Sandra' | Large | Dark-Green | Marginal | White | Unknown | - | July into August | Schwarz, Jim & Karen | .2015 |
| 'Sangamore of the Wabash' | Large | Blue/Green | Marginal | Yellow | Hybrid | - | - | Balitewicz, Bob | --NR-- |
| 'Sarah Fackey' | Medium | Med-Green | Marginal | Yellow | Unknown | - | June into July | Benedict, Dr R. (Herb) & Dorothy & Kuenster, Rod | .2010 |
| 'Sarah Tilman' | Large | Yellow | - | - | Unknown | Near-White | July into August | Olson, Dr Robert & Family | .2009 |
| 'Saratoga Sunrise' | Medium | Light-Green | - | - | Hybrid | Near-White | June into July | Dalton, Jim & Meg | .2012 |
| 'Satin Beauty' | Large | Med-Green | - | - | Unknown | Pale-Lavender | June into July | Fisher, Eunice V. & AHS | .1986 |
| 'Satin Doll' | Medium | Med-Green | Streaked | White | Hybrid | Pale-Lavender | June | Ward, Dr Dick & Jane | .2012 |
| 'Save the Last Dance for Me' | Medium | Light-Green | - | - | Hybrid | Pale-Lavender | July into August | Kwick, Charles | .2017 |
| 'Saybrook Surprise' | Large | Blue/Green | Medial | Yellow | Nat-Sport | Near-White | June into July | Lydell, Ransom | .1998 |
| 'Scott Andrew' | Giant | Med-Green | - | - | Hybrid | Light-Purple | July into August | Kwick, Charles | .2017 |
| 'Sea Hero' | Medium | Blue/Green | - | - | Unknown | Near-White | June into July | Seaver, Mildred | --NR-- |
| 'Sea Monster' | Large | Med-Green | - | - | Hybrid | Near-White | June into July | Seaver, Mildred & Walek, Kevin | .2009 |
| 'Sea Peridot' | Large | Yellow | - | - | Hybrid | Near-White | June into July | Seaver, Mildred & Walek, Kevin | .2009 |
| 'Sea Slate II' | Large | Blue/Green | - | - | Unknown | Near-White | June into July | Seaver, Mildred | --NR-- |
| 'Secret Love' | Medium | Blue/Green | Marginal | Yellow | Nat-Sport | Light-Purple | August | van den Top, Jan & Van Eechaute, Danny | .2004 |
| 'Seersucker' | Large | Blue/Green | - | - | Hybrid | Near-White | June into July | Savory, Robert & Savory, Dennis | .2004 |
| 'Self Clean Blue' | Medium | Blue/Green | - | - | Unknown | - | - | Wade, Van | --NR-- |
| 'Semperaurea' | Large | Yellow-Gold | - | - | Unknown | Near-White | June | Foerster, Karl & Ruh, Peter and Jean | .2003 .2018 |
| 'Send Your Camel to Bed' | Medium | Med-Green | Marginal | Light Green | Nat-Sport | Pale-Lavender | July into August | Dammen, Mike | .2018 |
| 'Senora Colleen' | Medium | Med-Green | - | - | Hybrid | Med-Lavender | July into August | Kwick, Charles | .2016 |
| 'Sergeant Pepper' | Medium | Blue/Green | Marginal | Yellow | Unknown | Pale-Lavender | August | Wasitis, Chick | .2001 |
| 'Serpentine' | Medium | Light-Green | - | - | Hybrid | Med-Lavender | July into August | Scheer, Alttara & Gilligan, Madelon | .2015 .2018 |
| 'Shadow Wood Ruffles' | Medium | Yellow | - | - | Unknown | - | - | Goodwin, Randy | .2013 |
| 'Shawmut' | Medium | Blue/Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July | Malloy, Alex | .1999 |
| 'She Don't Know She's Beautiful' | Large | Yellow | - | - | Unknown | - | June into July | Kwick, Charles | .2016 |
| 'Sheriff of Nottingham' | Medium | Yellow | - | - | Nat-Sport | Med-Lavender | June | Zilis, Mark & Schwarz, Jim | .2012 |
| 'Shimmer' | Small | Blue/Green | Marginal | Yellow | Hybrid | Pale-Lavender | August | Dean, Don | .2018 |
| 'Shining Image' | Medium | Med-Green | - | - | Unknown | - | - | Powell, Loleta & Walek, Kevin | .2009 |
| 'Sight for Sore Eyes' | Small | Yellow | - | - | Hybrid | Pale-Lavender | July into August | Goodwin, Randy | .2013 |
| 'Silent Witness' | Medium | Med-Green | Marginal | Green | Hybrid | Deep-Purple | July | Malloy, Alex | .1997 |
| 'Silver Chalice' | Medium | Yellow | Marginal | White | Nat-Sport | Pale-Lavender | July | Elslager, Ed | .2005 |
| 'Silver Light' | Small | Blue/Green | - | - | Hybrid | Pale-Lavender | July into August | Knoppert, Rene | .2013 |
| 'Silver Threads' | Large | Blue/Green | Marginal | Yellow | Unknown | - | - | Tompkins, Chet | --NR-- |
| 'Simpers No. 5' | Giant | Dark-Green | - | - | Unknown | Pale-Lavender | June | Simpers, Lucille | --NR-- |
| 'Sir Adam' | Large | Yellow | - | - | Hybrid | - | June into July | Kwick, Charles | .2016 |
| 'Sir Cocky' | Giant | Dark-Green | - | - | Hybrid | - | June into July | Kwick, Charles | .2016 |
| 'Sir Logan' | Medium | Dark-Green | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Skipping School' | Medium | Dark-Green | - | - | Unknown | Med-Lavender | July into August | Kwick, Charles | .2017 |
| 'Sky Blue Waters' | Large | Blue/Green | Marginal | Yellow | Hybrid | Light-Purple | July into August | Elslager, Ed | .2005 |
| 'Small Sum' | Large | Yellow | - | - | Hybrid | Pure-White | July | Goodwin, Randy | .1996 |
| 'Smiling Dr. Jim' | Large | Light-Green | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Smokey Bear' | Giant | Dark-Green | - | - | Unknown | Near-White | June into July | Petryszyn, Olga | --NR-- |
| 'Smurfette' | Medium | Blue/Green | Marginal | White | Nat-Sport | Pale-Lavender | July into August | Wilson, Chris | .2017 |
| 'Snakeskin Boots' | Giant | Blue/Green | Marginal | Yellow | Hybrid | Pale-Lavender | June into July | Hackbarth, Robert | .2015 |
| 'Snow Bunting' | Large | Blue/Green | Marginal | Yellow | Nat-Sport | Near-White | June into July | Ford, Richard & Mary | .2015 |
| 'Snow Cap' | Medium | Blue/Green | Marginal | Creamy White | Hybrid | Near-White | June into July | Aden, Paul | .1980 |
| 'Soaring Eagle' | Giant | Med-Green | Streaked | Yellow | Hybrid | Pale-Lavender | June into July | Elslager, Ed | .2002 |
| 'Soft Focus' | Large | Yellow | - | - | Unknown | Near-White | June into July | Asch, Stuart | .2009 |
| 'Softly Spoken' | Medium | Blue/Green | Streaked | Yellow | Hybrid | - | - | White, Jeff | --NR-- |
| 'Solar Eclipse' (Ward) | Medium | Med-Green | Marginal | White | Hybrid | Pure-White | July | Ward, Dr Dick & Jane | .2012 |
| 'Solar Eclipse' (Ziarek) | Large | Yellow | - | - | Nat-Sport | Pale-Lavender | June into July | Ziarek, Ken | --NR-- |
| 'Solar Flare' | Giant | Yellow | - | - | Unknown | Pale-Lavender | June into July | Ross, Henry & Gardenview Horticultural Park | .2005 |
| 'Soldier Boy' | Medium | Blue/Green | Marginal | Yellow | Unknown | Pale-Lavender | June | Smith, Fred | --NR-- |
| 'Solitude' | Medium | Blue/Green | - | - | Hybrid | Pale-Lavender | August to September | Dean, Don | .2018 |
| 'Sombrero' | Large | Blue/Green | - | - | Hybrid | Pure-White | August | Savory, Robert | .1991 |
| 'Something Else' | Large | Light-Green | - | - | TC Sport | Near-White | June into July | Zilis, Mark | .2009 |
| 'Something Special' | Giant | Blue/Green | - | - | Nat-Sport | Near-White | June into July | Unknown | --NR-- |
| 'Soul Brother' | Small | Med-Green | - | - | Nat-Sport | Med-Lavender | July into August | Mortko, Rob | .2002 |
| 'South Pacific' | Giant | Med-Green | - | - | Unknown | - | - | Ward, Dr Dick & Jane | .2009 |
| 'Southern Music' | Medium | Dark-Green | Medial | White | Nat-Sport | Pale-Lavender | July | Harris, Robert | --NR-- |
| 'Spaceship' | Medium | Dark-Green | - | - | Nat-Sport | Near-White | July | Zilis, Mark & Schwarz, Jim | .2011 |
| 'Spartan Flash' | Medium | Med-Green | Streaked | Yellow | Nat-Sport | Med-Lavender | July | Elslager, Ed | .1998 |
| 'Special Forces' | Medium | Blue/Green | Streaked | Yellow | TC Sport | Light-Purple | July | Zilis, Mark | .2011 |
| 'Spinach Pie' | Large | Dark-Green | - | - | Nat-Sport | - | July into August | Fransen, Marco & Joyce | --NR-- |
| 'Spinach Soufflé' | Large | Blue/Green | Marginal | Yellow | TC Sport | Pale-Lavender | July | Solberg, Robert | .2006 |
| 'Spinnaker' | Large | Blue/Green | - | - | Hybrid | Near-White | June | Seaver, Charles | .1994 |
| 'Sportcaster' | Medium | Med-Green | Marginal | Yellow | Hybrid | Pure-White | July | Elslager, Ed | .2004 |
| 'Spring Shower' | Medium | Blue/Green | - | - | Hybrid | Pale-Lavender | July | Solberg, Robert | .2007 |
| 'Spumoni' | Medium | Light-Green | Streaked | Yellow | Hybrid | Pale-Lavender | July | Elslager, Ed | .2004 |
| 'Squash Blossom' | Medium | Blue/Green | Marginal | Yellow | Unknown | - | June into July | Tompkins, Chet & Ruh, Peter & Jean | .2005 |
| 'St. Paul' | Large | Blue/Green | Medial | Yellow | Nat-Sport | Pale-Lavender | July | Goad, Tom | --NR-- |
| 'Stand Up' | Large | Med-Green | Streaked | Yellow | Unknown | - | - | Livingston, Ron | --NR-- |
| 'Standard's Bands' | Medium | Med-Green | Marginal | Yellow | Nat-Sport | Med-Lavender | July into August | McHugh, Ed | .2010 |
| 'Star Power' | Large | Yellow | - | - | Hybrid | - | - | Beilstein, Doug & Mardy | .2009 |
| 'Star Spangled Banner' | Large | Med-Green | Streaked | Yellow | Hybrid | Near-White | June into July | Elslager, Ed | .2002 |
| 'Stardust Memories' | Medium | Yellow | - | - | Hybrid | Near-White | June into July | Ward, Dr Dick & Jane | .2014 |
| 'Stark Naked' | - | Med-Green | - | - | Unknown | - | - | Stark, Gunther | --NR-- |
| 'Starship Enterprise' | Medium | Light-Green | Streaked | Green | Nat-Sport | Pale-Lavender | July into August | Kwick, Charles | .2017 |
| 'Steffi' | Medium | Dark-Green | Marginal | White | Nat-Sport | - | July into August | Serafin, Viktoria | .2008 |
| 'Stegeman's Dreadnaught' | Large | Dark-Green | - | - | Hybrid | Pale-Lavender | June into July | Stegeman, Bev & Dave | --NR-- |
| 'Step Brother' | Giant | Dark-Green | - | - | Nat-Sport | Pure-White | June into July | Schulz, Ed | .2011 |
| 'Stepping Out' | Medium | Blue/Green | Marginal | Yellow | Hybrid | Near-White | June | Vaughn, Kevin | --NR-- |
| 'Still Waters' | Medium | Blue/Green | - | - | Hybrid | - | June | Ward, Dr Dick & Jane | .2010 |
| 'Sting' | Medium | Dark-Green | Marginal | White | Nat-Sport | Med-Lavender | July into August | Heemskerk, Gerardus | .2011 |
| 'Storm' | Medium | Blue/Green | - | - | Hybrid | Pale-Lavender | August to September | Shadrack, Mike | .2011 |
| 'Stormcloud' | Large | Dark-Green | - | - | Unknown | - | June into July | Kedl, Phyllis | .2010 |
| 'Stormy Lakes' | Large | Blue/Green | - | - | Hybrid | Pale-Lavender | June into July | Goodale, T. | .2009 |
| 'Stormy Night' | Large | Dark-Green | - | - | Unknown | - | - | Carlson, Monty & Julie | --NR-- |
| 'Stormy Seas' | Large | Dark-Green | - | - | Hybrid | Pale-Lavender | June into July | Zilis, Mark | .2004 |
| 'Stormy Weather' | Large | Med-Green | - | - | Hybrid | Deep-Purple | July into August | Johnson, Greg | .2004 |
| 'Straight Flush' | Medium | Yellow | - | - | Nat-Sport | Pale-Lavender | July | Savory, Dennis | .2004 |
| 'Strawberry Surprise' | Medium | Blue/Green | Marginal | Yellow | Hybrid | Pale-Lavender | July into August | Dean, Don | .2008 |
| 'Streaker Ahoy' | Giant | Dark-Green | Streaked | Yellow | Hybrid | Pale-Lavender | June into July | Elslager, Ed | .2004 |
| 'Streaker Heaven' | Large | Blue/Green | Streaked | Yellow | Hybrid | Med-Lavender | June into July | Kuenster, Rod | .2009 |
| 'Streaking Buck Naked' | Medium | Dark-Green | Streaked | Yellow | Unknown | - | - | Freeman, Franc & Sally | .2009 |
| 'Strike it Rich' | Large | Yellow | - | - | Hybrid | Pale-Lavender | June into July | Ward, Dr Dick & Jane | .2014 |
| 'Stuart's Gold' | Medium | Yellow | - | - | Unknown | - | - | Unknown | --NR-- |
| 'Sugar Plum' | Large | Med-Green | - | - | Hybrid | Light-Purple | August to September | Solberg, Robert | .2011 |
| 'Sum Of All' | Giant | Blue/Green | Marginal | Green | TC Sport | Med-Lavender | July into August | Zilis, Mark | .2000 |
| 'Summer Breeze' | Large | Dark-Green | Marginal | Yellow | TC Sport | Pale-Lavender | July | Zilis, Mark | .1999 |
| 'Summer Concerto' | Medium | Light-Green | Medial | White | Nat-Sport | Pale-Lavender | July | Ziarek, Ken | --NR-- |
| 'Summer Fest' | Medium | Med-Green | Streaked | Yellow | Nat-Sport | Pale-Lavender | July | Unknown | --NR-- |
| 'Summer Gold' | Medium | Med-Green | - | - | Unknown | Pale-Lavender | July into August | Hamblin, Nesmith, Philips & Ruh, Peter | .1998 |
| 'Summer Music' | Medium | Med-Green | Medial | White | Nat-Sport | Pale-Lavender | July | Klehm, Roy | .1998 |
| 'Summer Music Gold' | Medium | Yellow | - | - | Nat-Sport | Pale-Lavender | July | Unknown | --NR-- |
| 'Summer Music Supreme' | Medium | Med-Green | Streaked | White | Nat-Sport | Pale-Lavender | July | Stark, Gunther | --NR-- |
| 'Summer Palace' | Large | Light-Green | Marginal | Yellow | Hybrid | - | June into July | Ward, Dr Dick & Jane | .2010 |
| 'Summer Rainbow' | Large | Dark-Green | Marginal | White | Nat-Sport | - | July into August | Bowe, Dave & Wilson, Chris | .2010 |
| 'Summer Storm' | Medium | Dark-Green | Marginal | Light Green | Nat-Sport | - | - | Zilis, Mark | .2012 |
| 'Summer Wedding' | Medium | Yellow | - | - | Unknown | Pure-White | - | Nyikos, Frank | .2009 |
| 'Sun and Shadow' | Medium | Blue/Green | Medial | Light Green | Nat-Sport | Light-Purple | July | van den Top, Jan | --NR-- |
| 'Sun Glow' | Large | Yellow | - | - | Hybrid | Pale-Lavender | June | Aden, Paul | .1974 |
| 'Sun Goddess' | Large | Yellow | - | - | Hybrid | Near-White | June into July | Kedl, Phyllis | .2010 |
| 'Sun Safari' | Large | Yellow | - | - | Unknown | Pale-Lavender | - | Goodwin, Randy | .2014 |
| 'Sunfish' | Large | Light-Green | - | - | Unknown | - | - | Carlson, Monty & Julie | --NR-- |
| 'Sunfish Blue' | Giant | Blue/Green | - | - | Unknown | - | July into August | Sauve, Criste | .2004 |
| 'Sunlight and Shadows' | Medium | Med-Green | Streaked | Yellow | Nat-Sport | - | July into August | Ward, Dr Dick & Jane | .2009 |
| 'Sunset Strip' | Giant | Blue/Green | Streaked | Yellow | Unknown | Pale-Lavender | July into August | Elslager, Ed | .2005 |
| 'Super Hero' | Medium | Dark-Green | Marginal | White | Hybrid | - | July into August | Tylinski, Stan & Malloy, Alex | .2005 |
| 'Sweet and Sour' | Large | Med-Green | Streaked | Yellow | Nat-Sport | Near-White | August to September | van den Top, Jan & Van Eechaute, Danny | .2008 |
| 'Sweet Chariot' | Giant | Med-Green | Marginal | Yellow | Hybrid | - | June into July | Ward, Dr Dick & Jane | .2009 |
| 'Sweet Home Chicago' | Medium | Yellow | Marginal | Blue-Green | TC Sport | Pale-Lavender | July | Ruh, Peter | .2002 |
|