| Small Size Hostas | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Sabrina' | Dark-Green | | - | Unknown | Med-Lavender | - | Bastille, Jocelyne | --NR-- |
| 'Sada' | Blue/Green | Marginal | White | Nat-Sport | - | - | Van Eechaute, Danny | --NR-- |
| 'Saginaw' | Light-Green | | - | Unknown | Med-Lavender | June into July | Krossa, Gus & Ruh, Peter & Jean | .2009 .2018 |
| 'Sahara Nights' | Blue/Green | | - | Unknown | Med-Lavender | July | Terpening, Kent | --NR-- |
| 'Sailor's Warning' | Yellow | | - | Hybrid | Light-Purple | August | Seaver, Charles | .1995 |
| 'Saint Fiacre' | Blue/Green | | - | Hybrid | Pale-Lavender | - | Bowden, Roger | --NR-- |
| 'Saishu Elmo' | Dark-Green | | - | Unknown | Near-White | - | Benedict, Dr R. (Herb) | --NR-- |
| 'Saishu Jima' | Med-Green | | - | Unknown | Deep-Purple | August | Unknown & Ruh, Peter | .2002 .2018 |
| 'Saishu Jima Gold' | Yellow | | - | Hybrid | - | - | Unknown | --NR-- |
| 'Saizaki' | - | | - | Nat-Sport | Deep-Purple | September | Unknown | --NR-- |
| 'Saizaki Hime Iwa' | Med-Green | | - | Nat-Sport | Deep-Purple | September | Watanabe, Kenji | --NR-- |
| 'Saketini' | Yellow | | - | Hybrid | Light-Purple | August to September | Zilis, Mark | .2009 |
| 'Sally Hoffman' | Med-Green | Marginal | Yellow | Hybrid | Pale-Lavender | June into July | Ward, Dr Dick & Jane | .2014 |
| 'Salus' | Yellow | | - | Unknown | - | July into August | Malloy, Alex | .2004 |
| 'Samuel' | Light-Green | | - | Unknown | Near-White | - | Bastille, Jocelyne | --NR-- |
| 'Sandhill Crane' | Med-Green | Marginal | White | Nat-Sport | Light-Purple | August | Johnson, Greg | .2004 |
| 'Sandpaper' | Blue/Green | | - | Unknown | - | - | Brashear, Carol | --NR-- |
| 'Sanshoku Tsushima' | Med-Green | | - | Hybrid | Light-Purple | August to September | Watanabe, Kenji | --NR-- |
| 'Sawtooth' | Med-Green | | - | Hybrid | Deep-Purple | July into August | Housworth | --NR-- |
| 'Scally Cap' | Med-Green | | - | Unknown | - | August to September | Stadden, Josh | .2003 |
| 'Scarab' | Light-Green | | - | Unknown | - | - | Malloy, Alex | --NR-- |
| 'Scaredy Cat' | Light-Green | | - | Hybrid | Pale-Lavender | June into July | Jones, Leonard | .2006 |
| 'Scarlet Empress' | Med-Green | | - | Unknown | - | - | Malloy, Alex | --NR-- |
| 'Scarlet Pimpernel' | Med-Green | | - | Unknown | - | - | Malloy, Alex | --NR-- |
| 'Scarlet Ribbons' | Med-Green | Marginal | Creamy White | Hybrid | Deep-Purple | August to October | Elslager, Ed | .2002 |
| 'Schneck' | Blue/Green | | - | Unknown | Med-Lavender | - | Maindok, Hans-Hennig | --NR-- |
| 'Schneewittchen' | Med-Green | Medial | White | Unknown | Light-Purple | August | Klose, Heinz | --NR-- |
| 'School Mouse' | Blue/Green | Marginal | Yellow | TC Sport | Light-Purple | July | Hansen, Hans & Walters Gardens. | --NR-- |
| 'Schwarzer Ritter' | Dark-Green | | - | Unknown | Light-Purple | - | Klose, Heinz & Ruh, Peter & Jean | .2008 |
| 'Scintillation' | Dark-Green | Marginal | White | Unknown | - | - | Hawes, James | --NR-- |
| 'Scituate Light' | Med-Green | Marginal | White | Unknown | - | - | Goodenough, Rick | --NR-- |
| 'Scooby Doo' | Med-Green | | - | Unknown | - | - | Benedict, Dr R. (Herb) | --NR-- |
| 'Scoop' | Med-Green | Marginal | White | Hybrid | - | - | Malloy, Alex | --NR-- |
| 'Scooter' | Med-Green | Marginal | Creamy White | Hybrid | Light-Purple | July into August | Benedict, Dr Ralph (Herb) | .1990 |
| 'Scoundrel' | Med-Green | Marginal | White | Unknown | - | - | Goodwin, Randy | --NR-- |
| 'Screwball' | Med-Green | Marginal | White | Unknown | - | - | Goodwin, Randy | --NR-- |
| 'Sea Angel' | Med-Green | Marginal | White | Unknown | Light-Purple | June into July | Seaver, Mildred & Walek, Kevin | .2009 |
| 'Sea Gull' | Dark-Green | Marginal | White | Unknown | Pure-White | August to October | Seaver, Mildred | .2004 |
| 'Sea Nautilus' | Yellow | | - | Unknown | - | June into July | Seaver, Mildred & Walek, Kevin | .2009 |
| 'Sea Sprite' | Yellow | Marginal | Dark Green | Hybrid | Pale-Lavender | August to October | Seaver, Mildred | .1978 |
| 'Sea Sunrise' | Light-Green | Streaked | Speckles | Hybrid | Pale-Lavender | July | Seaver, Mildred | .1982 |
| 'Sea Unicorn' | Yellow | | - | Unknown | - | - | Seaver, Mildred | --NR-- |
| 'Sea Wiggles' | Yellow | Marginal | Green | Hybrid | Light-Purple | July | Seaver, Mildred | .1981 |
| 'Secret Thoughts' | Blue/Green | Streaked | Yellow | Nat-Sport | Med-Lavender | August | van den Top, Jan | --NR-- |
| 'Self-Assured' | Dark-Green | | - | Hybrid | Near-White | July into August | Livingston, Ron | --NR-- |
| 'Senior Chords' | Blue/Green | | - | Unknown | - | - | Goodwin, Randy | --NR-- |
| 'Sent from Heaven' | Med-Green | Marginal | Yellow | Unknown | - | - | Goodwin, Randy | --NR-- |
| 'Serapis' | Med-Green | Marginal | White | Nat-Sport | Med-Lavender | July into August | Malloy, Alex | .2000 |
| 'Seto-Gekko' | Dark-Green | Streaked | White | Hybrid | - | September | Unknown | --NR-- |
| 'Setsukei' | Dark-Green | Medial | Yellow | Unknown | - | - | Watanabe, Kenji | --NR-- |
| 'Setsuko Iwa' | Med-Green | | - | Unknown | - | - | Davidson, LeRoy | --NR-- |
| 'Shade Avenue' | Light-Green | Streaked | Yellow | Unknown | - | - | Smith, Roger | --NR-- |
| 'Shade Babe' | Light-Green | | - | Hybrid | - | - | Lysne, Rod | --NR-- |
| 'Shade Carnival' | Light-Green | Marginal | Yellow | Unknown | - | - | Goodwin, Randy | --NR-- |
| 'Shade Finale' | Med-Green | | - | Nat-Sport | Pale-Lavender | July into August | Goodwin, Randy | .2005 |
| 'Shade Parade' | Light-Green | Marginal | White | Nat-Sport | Pale-Lavender | July | Goodwin, Randy | .2005 |
| 'Shades of Mercy' | Med-Green | Streaked | Yellow | Nat-Sport | Pale-Lavender | August | Snyder, Ron | .1998 |
| 'Shadow Dance' | Med-Green | Streaked | White | Unknown | - | - | Janssen, Bill | --NR-- |
| 'Shady Character' | Dark-Green | Marginal | White | Unknown | - | - | Schwarz, Jim | --NR-- |
| 'Shady Lover' | Dark-Green | Marginal | White | Unknown | Light-Purple | July | Goodwin, Randy | .2005 |
| 'Shake for Me' | Light-Green | | - | Nat-Sport | Med-Lavender | - | Van Eechaute, Danny | --NR-- |
| 'Shamash' | Med-Green | Streaked | White | Unknown | - | - | Leuckx, Bart | --NR-- |
| 'Shane' | Med-Green | Marginal | Yellow | Unknown | - | - | Malloy, Alex | --NR-- |
| 'Shark's Tooth' | Light-Green | | - | Hybrid | Near-White | June into July | Nyikos, Frank | .2005 |
| 'Sharmon' | Med-Green | | - | Nat-Sport | Pale-Lavender | July into August | Donahue, Thomas | .1986 |
| 'Sharon's Choice' | Med-Green | Streaked | Yellow | Hybrid | - | July into August | Hicks, Gerry | .2014 |
| 'Sharp Shooter' | Med-Green | | - | Hybrid | Light-Purple | August | Krul, Nancy & Belle Gardens | .1993 |
| 'Shere Khan' | Med-Green | Marginal | White | TC Sport | Pale-Lavender | June | Zumbar, Wm | .1995 |
| 'She's a Lady' | Blue/Green | | - | Unknown | - | - | Unknown | --NR-- |
| 'Shichu-no-Tama' | Light-Green | | - | Hybrid | - | - | Watanabe, Kenji | --NR-- |
| 'Shima Kabitan' | Med-Green | Streaked | White | Hybrid | - | - | Watanabe, Kenji | --NR-- |
| 'Shima Kita Nishiki' | Dark-Green | Medial | Light Green | Unknown | - | - | Hirose, Yoshimichi | --NR-- |
| 'Shimizu Iwa' | Med-Green | Streaked | White | Hybrid | - | - | Shimizu, Toshirou | --NR-- |
| 'Shimmer' | Blue/Green | Marginal | Yellow | Hybrid | Pale-Lavender | August | Dean, Don | .2018 |
| 'Shimmers in the Moonlight' | Blue/Green | | - | Hybrid | Near-White | July into August | Kwick, Charles | .2017 |
| 'Shinano Nishiki' | Light-Green | | - | Nat-Sport | Near-White | June into July | Unknown | --NR-- |
| 'Shine' | Dark-Green | | - | Unknown | - | - | Malloy, Alex | --NR-- |
| 'Shining Spirit' | Light-Green | Medial | Yellow | Nat-Sport | Med-Lavender | July | Malloy, Alex | --NR-- |
| 'Shirataki' | Med-Green | Streaked | White | Hybrid | - | - | Tanaka, Katsuyoshi | --NR-- |
| 'Shiro Kabitan' | Med-Green | Medial | White | Unknown | Light-Purple | August | Unknown | --NR-- |
| 'Shiro Sukurin' | Light-Green | Marginal | White | Unknown | - | - | Unknown | --NR-- |
| 'Shirobana Hime Iwa' | Med-Green | | - | Hybrid | Pure-White | September | Unknown | --NR-- |
| 'Shirobana Iwa' | Med-Green | | - | Hybrid | Near-White | - | Unknown | --NR-- |
| 'Shirobana Keirin' | Med-Green | | - | Nat-Sport | Near-White | July | Unknown | --NR-- |
| 'Shirobana Kika Koba' | Med-Green | | - | Hybrid | Near-White | - | Unknown | --NR-- |
| 'Shirobana Mizu' | Med-Green | | - | Unknown | Light-Purple | August to October | Unknown | --NR-- |
| 'Shirobana Shikoku' | Med-Green | | - | Nat-Sport | Near-White | July | Unknown | --NR-- |
| 'Shirobana Tachi' | Med-Green | Marginal | White | Hybrid | Near-White | - | Unknown | --NR-- |
| 'Shirobuchi' | Med-Green | Marginal | Yellow | Nat-Sport | Deep-Purple | August | Unknown | --NR-- |
| 'Shirobuchi Koba' | Med-Green | Marginal | White | Nat-Sport | - | - | Unknown | --NR-- |
| 'Shirofukurin Hosoba Mizu' | Med-Green | Marginal | White | Nat-Sport | Pale-Lavender | September | Unknown | --NR-- |
| 'Shirofukurin Ko Mame' | Med-Green | Marginal | White | Nat-Sport | Light-Purple | September | Unknown | --NR-- |
| 'Shirofukurin Koba' | Med-Green | Medial | White | Nat-Sport | - | - | Unknown | --NR-- |
| 'Shirofukurin Sudare' | Med-Green | Marginal | White | Nat-Sport | Pale-Lavender | August to October | Unknown | --NR-- |
| 'Shirofukurin Sudare Shikoku' | Med-Green | Marginal | White | Nat-Sport | - | - | Unknown | --NR-- |
| 'Shirofukurin Sudare Wakayama' | Dark-Green | Marginal | White | Nat-Sport | - | - | Unknown | --NR-- |
| 'Shirofukurin Urajiro Iwa' | Med-Green | Marginal | White | Nat-Sport | - | - | Unknown | --NR-- |
| 'Shirofukurin Wakayama' | Med-Green | Marginal | White | Nat-Sport | Med-Lavender | August to September | Unknown | --NR-- |
| 'Shironakafu Otome' | Med-Green | Medial | White | Nat-Sport | Light-Purple | July | Unknown | --NR-- |
| 'Shoot The Works' | Blue/Green | Medial | Yellow | Unknown | - | - | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Short Fat Fanny' | Med-Green | Marginal | White | Hybrid | Light-Purple | July | Wasitis, Chick | --NR-- |
| 'Short Folks' | Dark-Green | | - | Unknown | - | - | Goodman, Jack | --NR-- |
| 'Short Pants' | Dark-Green | Marginal | Yellow | Unknown | - | - | Unknown | --NR-- |
| 'Shoshone' | Yellow | Marginal | White | Unknown | - | - | Goodwin, Randy | --NR-- |
| 'Show Biz' | Med-Green | Streaked | White | Hybrid | - | - | Malloy, Alex | --NR-- |
| 'Show Me' | Med-Green | Medial | White | TC Sport | Pale-Lavender | July | Tempel, Arlie | --NR-- |
| 'Show Piece' | Med-Green | | - | Hybrid | Light-Purple | July into August | Krossa, Gus & Ruh, Peter | .1998 |
| 'Showcase' | Med-Green | Marginal | White | Hybrid | - | - | Beilstein, Doug & Malloy, Alex | --NR-- |
| 'Sight for Sore Eyes' | Yellow | | - | Hybrid | Pale-Lavender | July into August | Goodwin, Randy | .2013 |
| 'Signet' | Med-Green | Streaked | Speckles | Hybrid | - | - | Malloy, Alex | --NR-- |
| 'Silberlöffel' | Light-Green | Marginal | White | Unknown | - | - | Kohlein, Fritz | --NR-- |
| 'Silver Certificate' | Dark-Green | Medial | White | Nat-Sport | Med-Lavender | July into August | Meyer, Bill | --NR-- |
| 'Silver Dust' | Blue/Green | | - | Unknown | - | July | Fisher, Eunice V. & Ruh, Peter | .1995 |
| 'Silver Fox' | Yellow | Marginal | Yellow | Nat-Sport | - | - | Unknown | --NR-- |
| 'Silver Heart' | Light-Green | Medial | White | Unknown | - | - | Unknown | --NR-- |
| 'Silver Light' | Blue/Green | | - | Hybrid | Pale-Lavender | July into August | Knoppert, Rene | .2013 |
| 'Silver Splash' | Dark-Green | Medial | White | Unknown | - | - | Snyder (Unknown) | --NR-- |
| 'Silver Streak' | Med-Green | Medial | White | Unknown | Pale-Lavender | July | Zager, Herbert A. & AHS | .1986 |
| 'Silver Threads & Golden Needles' | Yellow | Medial | Creamy White | TC Sport | Light-Purple | July | Anderson, Jim | --NR-- |
| 'Silver Twist' | Blue/Green | | - | Unknown | Pale-Lavender | - | Yinger, Barry | --NR-- |
| 'Silverado' | Blue/Green | Marginal | White | Unknown | Med-Lavender | August to October | Kuk, Bob | .1987 |
| 'Simply Irresistible' | Blue/Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July into August | Wasitis, Chick | .2014 |
| 'Singularity' | Dark-Green | | - | Hybrid | Pale-Lavender | June into July | Bartley, J. | .2017 |
| 'Sir Lancelot' | Dark-Green | Streaked | White | Nat-Sport | Med-Lavender | August | Elslager, Ed | .2005 |
| 'Sitting Pretty' | Dark-Green | Medial | Yellow | Hybrid | Light-Purple | July | Aden, Paul | .1987 |
| 'Skinny Dippin' | Blue/Green | | - | Hybrid | Pale-Lavender | July into August | Avent, Tony | .2006 |
| 'Skinny Mouse' | Light-Green | | - | Nat-Sport | Light-Purple | July | Van Eechaute, Danny | --NR-- |
| 'Sleeping Beauty' | Blue/Green | Marginal | White | Nat-Sport | Pale-Lavender | July into August | Walters Gardens | .1997 |
| 'Slick Chick' | Med-Green | | - | Unknown | - | - | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Slim and Trim' | Blue/Green | | - | Nat-Sport | Light-Purple | July | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Slim Polly' | Light-Green | | - | Hybrid | Light-Purple | August | Williams, Frances | .1986 |
| 'Slim Shady' | Blue/Green | | - | Nat-Sport | - | - | German, Ellen | --NR-- |
| 'Small Parts' | Dark-Green | | - | Hybrid | Pale-Lavender | July | Van Eechaute, Danny | .2006 |
| 'Small Talk' | Med-Green | | - | Unknown | Pale-Lavender | June | Simpers, Lucille & Ruh, Peter | .1991 |
| 'Smalltown Boy' | Med-Green | | - | Nat-Sport | Med-Lavender | July into August | Van Eechaute, Danny | --NR-- |
| 'Smiley Face' | Yellow | | - | Hybrid | - | July into August | Solberg, Robert | .2011 |
| 'Smiling Mouse' | Blue/Green | Marginal | Yellow | Nat-Sport | Med-Lavender | July | van den Top, Jan | --NR-- |
| 'Smiling Sailor' | Med-Green | Medial | White | Unknown | Light-Purple | July | Seaver, Charles | .1996 |
| 'Snap Crackle Pop' | Blue/Green | | - | Unknown | - | - | Aden, Paul | --NR-- |
| 'Sneak Preview' | Yellow | | - | Hybrid | - | June into July | Ward, Dr Dick & Jane | .2010 |
| 'Sno Cone' | Light-Green | Medial | White | Nat-Sport | Pale-Lavender | July | Solberg, Robert | .2009 |
| 'Snow Drop' | Dark-Green | | - | Unknown | - | - | Unknown | --NR-- |
| 'Snow Flurry' | Light-Green | Streaked | Speckles | Hybrid | Near-White | August | Vaughn, Kevin | .1973 |
| 'Snow Mound' | Med-Green | | - | Unknown | Pure-White | August | Skylands Nursery & Ruh, Peter | .1997 |
| 'Snow Mouse' | Blue/Green | Medial | White | Nat-Sport | Pale-Lavender | - | Fransen, Marco | --NR-- |
| 'Snow White' | Med-Green | Medial | White | Nat-Sport | Med-Lavender | July | Arett, Anne | .1983 |
| 'Snowbird' | Med-Green | Marginal | White | Unknown | - | June into July | Goodwin, Randy | .2000 |
| 'Snowdrift' | Med-Green | Medial | White | TC Sport | Pale-Lavender | July | Zilis, Mark | .1985 |
| 'Snowstorm' | Med-Green | | - | Hybrid | Near-White | August | Simpers, Lucille | .1980 |
| 'Soft Touch' | Med-Green | | - | Hybrid | Light-Purple | July | Savory, Robert | .1977 |
| 'Songbird' | Blue/Green | Streaked | Yellow | Hybrid | Med-Lavender | June into July | Elslager, Ed | .2005 |
| 'Sotoyama Fukurin Mizu' | Dark-Green | Marginal | White | Nat-Sport | Light-Purple | September to October | Unknown | --NR-- |
| 'Soul Brother' | Med-Green | | - | Nat-Sport | Med-Lavender | July into August | Mortko, Rob | .2002 |
| 'Soules' Upright Green' | Dark-Green | | - | Unknown | - | - | Soules, Marjorie | --NR-- |
| 'Sounds of Kinnick' | Blue/Green | Streaked | White | Hybrid | Unknown | Unknown | Kuenster, Rod | --NR-- |
| 'Southern Pride' | Light-Green | Marginal | Yellow | Hybrid | Pale-Lavender | June into July | Suggs, Natalee | .1986 |
| 'Sovereign' | Med-Green | | - | Hybrid | Pure-White | - | Malloy, Alex | --NR-- |
| 'Sparkle' | Med-Green | Streaked | Yellow | Hybrid | - | August to October | Tanaka, Katsuyoshi & Zilis, Mark | .2009 |
| 'Sparky' | Dark-Green | Marginal | Yellow | Hybrid | Light-Purple | August | Aden, Paul | .1987 |
| 'Spartan Arrow' | Med-Green | | - | Hybrid | Light-Purple | July | Goodwin, Randy | .2000 |
| 'Spes' | Med-Green | Streaked | White | Hybrid | - | - | Beilstein, Doug & Malloy, Alex | --NR-- |
| 'Spider's Web' | Light-Green | Streaked | White | Unknown | - | - | de Rooij, Piet | --NR-- |
| 'Spingarn's Japan' | Dark-Green | | - | Unknown | Light-Purple | July | Malloy, Alex | .2000 |
| 'Splashed Heart' | Med-Green | Streaked | Yellow | Hybrid | - | - | Van Eechaute, Danny | --NR-- |
| 'Splendens' | Dark-Green | Marginal | Yellow | Unknown | - | - | Unknown | --NR-- |
| 'Spooky' | Dark-Green | Marginal | Yellow | Unknown | - | - | Unknown | --NR-- |
| 'Spot Cash' | Yellow | | - | Hybrid | - | - | Malloy, Alex | --NR-- |
| 'Spring Ivory' | Med-Green | Medial | White | Hybrid | - | - | Lantis, Clarence | .1982 |
| 'Spring Lace' | Dark-Green | Medial | Green | Hybrid | Light-Purple | July into August | Helsley, Calvin | .1998 |
| 'Squad Car' | Light-Green | | - | Unknown | - | - | Malloy, Alex | --NR-- |
| 'Squiggles' | Med-Green | Medial | White | Hybrid | Pale-Lavender | July into August | Aden, Paul | .1978 |
| 'Squiggles Green' | Med-Green | | - | Nat-Sport | Med-Lavender | July | Wade, Van | --NR-- |
| 'St. James Place' | Med-Green | Streaked | Speckles | Hybrid | - | - | Malloy, Alex | --NR-- |
| 'Star Ride' | Med-Green | Streaked | White | Hybrid | - | - | Malloy, Alex | --NR-- |
| 'Star Struck' | Med-Green | Marginal | Blue-Green | Nat-Sport | Med-Lavender | August | Wilkins, Dr Jim & Jill | .1995 |
| 'Starburst' | Blue/Green | Marginal | White | Hybrid | Pale-Lavender | August | Eisel, Mervin | .1973 |
| 'Stargazer' | Med-Green | Marginal | White | Hybrid | Deep-Purple | June into July | Avent, Tony | .2007 |
| 'Starry Starry Night' | Med-Green | | - | Hybrid | Near-White | July | Wilkins, Dr Jim | .2000 |
| 'Stars and Stripes Forever' | Blue/Green | Streaked | Yellow | Hybrid | - | - | Malloy, Alex | --NR-- |
| 'Steely Dan' | Blue/Green | | - | Hybrid | Pale-Lavender | June into July | Avent, Tony | .2007 |
| 'Stephen' | Blue/Green | | - | Hybrid | Med-Lavender | July | Weissenberger, Henry | .1986 |
| 'Steven Bolanos' | Med-Green | Marginal | White | Unknown | Light-Purple | - | Stygall, Patsy | --NR-- |
| 'Stickpin' | Med-Green | | - | Unknown | - | - | Unknown | --NR-- |
| 'Stilbon' | Blue/Green | | - | Unknown | - | - | Unknown | --NR-- |
| 'Stinger' | Dark-Green | | - | Unknown | - | - | Unknown | --NR-- |
| 'Stitch In Time' | Yellow | Medial | Green | Nat-Sport | Pale-Lavender | July | Mortko, Rob | .2004 |
| 'Stolen Kiss' | Light-Green | Medial | White | TC Sport | Light-Purple | July | Anderson, Jim | --NR-- |
| 'Stoop' | Blue/Green | | - | Unknown | Med-Lavender | - | Vincun, Rachael | --NR-- |
| 'Stoplight' | Med-Green | | - | Unknown | - | - | Kuk, Bob | --NR-- |
| 'Straight Arrow' | Med-Green | | - | Nat-Sport | Pale-Lavender | July into August | Malloy, Alex | --NR-- |
| 'Strawberry Yogurt' | Blue/Green | | - | Hybrid | Light-Purple | August | Zilis, Mark | .2009 |
| 'Streakin in Georgia' | Light-Green | Streaked | Yellow | Unknown | Med-Lavender | - | Thaubald, Ed | --NR-- |
| 'Streaking Sandy' | Med-Green | Streaked | Yellow | Nat-Sport | Med-Lavender | July into August | Freeman, Franc | .2012 |
| 'Streaks to a Point' | Med-Green | Streaked | Yellow | Unknown | - | - | Unknown | --NR-- |
| 'Striker' | Light-Green | Marginal | White | Nat-Sport | Light-Purple | July | Lydell, Ransom | .2000 |
| 'Stringbean' | Med-Green | | - | Unknown | - | - | Cullerton, Walter | --NR-- |
| 'Stringed Beans' | Med-Green | | - | Unknown | - | - | Goodwin, Randy | --NR-- |
| 'Striped Keepsake' | Dark-Green | Streaked | White | Unknown | - | - | Unknown | --NR-- |
| 'Stripshow' | Dark-Green | Medial | White | Unknown | - | - | Unknown | --NR-- |
| 'Stuck in Time' | Yellow | | - | Nat-Sport | Pale-Lavender | July | Fransen, Marco & Joyce | --NR-- |
| 'Subtlety' | Light-Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | June into July | Tower, Alan | .2003 |
| 'Sudare Ishizuchi' | Med-Green | Streaked | White | Nat-Sport | - | - | Unknown | --NR-- |
| 'Sugar Pie' | Med-Green | Marginal | White | Nat-Sport | Med-Lavender | August | Snyder, Ron | .1998 |
| 'Sugar Plum Fairy' | Dark-Green | | - | Hybrid | Light-Purple | August | Briggs Nursery-WA | .1987 |
| 'Sultana' | Blue/Green | Marginal | Yellow | TC Sport | Pale-Lavender | June | Zumbar, Wm | .1988 |
| 'Summer Haze' | Blue/Green | | - | Unknown | - | - | Sligh, Barry | --NR-- |
| 'Summer Ripples' | Med-Green | Marginal | White | Hybrid | - | - | Avent, Tony & Walek, Kevin | .2009 |
| 'Sun Mouse' | Yellow | | - | Nat-Sport | Med-Lavender | June into July | Avent, Tony | --NR-- |
| 'Sun Shadows' | Light-Green | Streaked | Green | Nat-Sport | Pale-Lavender | July | Meyer, Bill | --NR-- |
| 'Sunbeam Green' | Dark-Green | | - | Unknown | - | - | Unknown | --NR-- |
| 'Sundae Mix' | Med-Green | Streaked | White | Nat-Sport | Med-Lavender | August to September | Philips, Hugo | --NR-- |
| 'Sunny Isle' | Yellow | | - | Unknown | - | August to September | Ruh, Peter | .1997 |
| 'Sunny Side Up' | Yellow | | - | Hybrid | Pale-Lavender | July into August | Avent, Tony | .2007 |
| 'Sunrise' | Yellow | | - | Hybrid | - | - | Malloy, Alex | --NR-- |
| 'Sunshine Kid' | Dark-Green | Marginal | Yellow | Hybrid | Light-Purple | July | Aden, Paul | .1980 |
| 'Super Bloomer' | Dark-Green | Streaked | Yellow | Unknown | Deep-Purple | - | Lydell, Ransom | --NR-- |
| 'Surfer Girl' | Med-Green | | - | Unknown | Light-Purple | July | Wasitis, Chick | .2000 |
| 'Surprised by Joy' | Med-Green | Medial | White | Hybrid | Light-Purple | July | Malloy, Alex | .1998 |
| 'Susquehanna River' | Med-Green | Marginal | White | Hybrid | - | - | Beilstein, Doug & Malloy, Alex | --NR-- |
| 'Suzuki Thumbnail' | Med-Green | | - | Hybrid | Light-Purple | July | Suzuki, Kichigoro & Ruh, Peter | .1987 |
| 'Suzuki Toenail' | Med-Green | | - | Hybrid | Light-Purple | July | Suzuki, Kichigoro & Ruh, Peter | --NR-- |
| 'Swan Lane' | Blue/Green | | - | Unknown | Med-Lavender | June into July | Van Zyverden, Inc. | --NR-- |
| 'Sweet Blonde Babe' | Yellow | Marginal | White | Nat-Sport | Med-Lavender | August | van den Top, Jan | --NR-- |
| 'Sweet Dreams' | Med-Green | Medial | White | TC Sport | Med-Lavender | July | Zilis, Mark & Walek, Kevin | .2009 |
| 'Sweet Jill' | Med-Green | Medial | White | Nat-Sport | Pale-Lavender | August | Benedict, Dr Ralph (Herb) | .1986 |
| 'Sweet Lucy' | Med-Green | Streaked | Speckles | Unknown | - | August | Cook, Wayne | .2000 |
| 'Sweetheart' | Med-Green | | - | Hybrid | Light-Purple | July | Armstrong, Maxine | --NR-- |
| 'Swiss Lady' | Blue/Green | Medial | White | Nat-Sport | Near-White | July | Hirsbrunner, Liselotte | .2005 |
| 'Sybil' | Med-Green | Medial | White | Nat-Sport | - | June into July | Pinterics, Michael | .2002 |
| 'Sydney' | Med-Green | Marginal | Yellow | Hybrid | Near-White | - | Graves, Butch | .2009 |
| 'Sydney's Spunk' | Med-Green | Marginal | White | Nat-Sport | Near-White | June | Keller, Robert | .2007 |
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