| Cultivar Name | Plant Size | Origin | Flower Color | Season | Source | Registered |
| 'Babbling Brook' | Giant | Hybrid | Pale-Lavender | - | Vaughn, Kevin & Walek, Kevin | .2009 |
| 'Baby Kim' | Miniature | Unknown | Light-Purple | July | Hauser, J. & Walek, Kevin | .2009 |
| 'Baby Liv' | - | Hybrid | - | - | Lambrichts, Johann | --NR-- |
| 'Baby Toes' | Small | Sport | Pale-Lavender | July into August | Zilis, Mark & Schwarz, Jim | .2015 |
| 'Bacchanal' | Small | Hybrid | Light-Purple | July into August | Davidson, LeRoy & Ruh, Peter | .1991 |
| 'Bad Boy' | Medium | TC Sport | Pale-Lavender | June into July | Heemskerk, Gerardus | --NR-- |
| 'Baiyu' | Giant | Hybrid | Near-White | June into July | Liu, Donghuan | .2016 |
| 'Baja White' | Small | Sport | - | August to September | Zilis, Mark | .2010 |
| 'Ballerina' | Medium | Hybrid | Pure-White | July | Savory, Robert | .1982 |
| 'Balloons' | Small | Hybrid | Deep-Purple | August | Krul, Nancy & Belle Gardens | .1994 |
| 'Balsam' | Medium | Hybrid | Med-Lavender | July into August | Housworth, Jere | --NR-- |
| 'Banana Boat' | Medium | Hybrid | Pale-Lavender | July | Lachman, Wm & Lachman, Eleanor | .1991 |
| 'Banana Muffins' | Medium | Unknown | Pale-Lavender | July | Schwarz, Jim | .1996 |
| 'Banana Pepper' | Large | Unknown | - | - | Hackbarth, Robert | .2015 |
| 'Bankrupt' | Giant | Sport | Pale-Lavender | July into August | Elslager, Ed | --NR-- |
| 'Barbara AMH' | Large | Unknown | - | June into July | Bastille, Jocelyne | --NR-- |
| 'Barbarossa' | Small | Hybrid | Pale-Lavender | August | Malloy, Alex | --NR-- |
| 'Barney Fife' | Small | Hybrid | Pale-Lavender | July into August | Avent, Tony | .1993 |
| 'Bases Loaded' | Medium | Hybrid | - | - | Beilstein, Doug & Malloy, Alex | --NR-- |
| 'Bayside Regal' | Medium | Hybrid | Light-Purple | July into August | Hicks, Gerry | .2015 |
| 'Bear Mountain' | Large | Hybrid | - | - | Malloy, Alex | --NR-- |
| 'Bear Necessities' | Large | Sport | - | July into August | Solberg, Robert | --NR-- |
| 'Bea's Colossus' | Large | Unknown | Pale-Lavender | June into July | Tompkins, Chet & Ruh, Peter | .2000 |
| 'Bea's Heartstrings' | Small | Unknown | - | June into July | Artley, A. | .2015 |
| 'Beatrice Green' | Medium | Sport | Deep-Purple | July | Bond, Sandra | --NR-- |
| 'Because of Art' | Medium | Hybrid | Pale-Lavender | September | Finke, Chuck & Ternes, Nick | .2018 |
| 'Bedspread' | Miniature | Sport | Pale-Lavender | July into August | Unknown | --NR-- |
| 'Beet Salad' | Small | Hybrid | Deep-Purple | July | Solberg, Robert | .2009 |
| 'Behemoth' | Giant | Unknown | Pale-Lavender | June into July | Savory, Robert | .1988 |
| 'Bellbird' | Medium | Hybrid | Med-Lavender | June into July | Dawber, Robert & Gilligan, Madelon | .2015 |
| 'Belle du Canada' | Small | Unknown | Near-White | - | Bastille, Jocelyne | --NR-- |
| 'Belle Of The Ball' | Medium | Hybrid | Pale-Lavender | August | Sugita, Hajime & Ruh, Peter | .1998 |
| 'Belle Vernon Beauty' | Giant | Hybrid | Pale-Lavender | June into July | Zolock, Steve & Zolock, Sarah | .2011 |
| 'Bellevue' | Medium | Hybrid | Med-Lavender | July into August | Van Eechaute, Danny | .2013 |
| 'Bells of Edinborough' | Small | Hybrid | Light-Purple | July into August | Savory, Robert | .1993 |
| 'Bellville Magic' | Large | Hybrid | Pale-Lavender | June into July | Ward, Dr Dick & Ward, Jane | .2015 |
| 'Ben' | Giant | Unknown | - | July into August | Zilis, Mark & Schwarz, Jim | .2015 |
| 'Ben Hur' | Medium | Sport | Pale-Lavender | July | Malloy, Alex | --NR-- |
| 'Benedict' | Small | Sport | Pale-Lavender | - | Gowen, Hideko | --NR-- |
| 'Benedict's Folly' | Large | Unknown | - | - | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Benedict's Heart's Desire' | Medium | Unknown | - | June into July | Benedict, Dr Ralph (Herb) & Kuenster, Rod | .2010 |
| 'Beni Suzume' | Miniature | Hybrid | - | - | Fukatsu, Shinya | --NR-- |
| 'Bennie McRae' | Large | Hybrid | Pale-Lavender | August | Suggs, Natalee | .1989 |
| 'Beryl Black' | Medium | Hybrid | Light-Purple | July into August | Hicks, Gerry | .2011 |
| 'Best Man' | Medium | Hybrid | Light-Purple | July | Ward, Dr Dick & Ward, Jane | .2004 |
| 'Best of Twenty' | Small | Hybrid | - | - | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Best Yet' | Miniature | Hybrid | Light-Purple | July | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Bethel Big Leaf' | Large | Hybrid | Pale-Lavender | July | Lantis, Clarence | .1979 |
| 'Bethlehem' | Medium | Sport | Pale-Lavender | July | Silvers, Bill | .2007 |
| 'Betsy King' | Medium | Hybrid | Deep-Purple | - | Williams, Frances | .1986 |
| 'Bette Comfrey' | Giant | Unknown | Pale-Lavender | July | Beilstein, Doug | .2007 |
| 'Bette Davis Eyes' | Medium | Hybrid | Pale-Lavender | August | Vaughn, Kevin | .1987 |
| 'Betty' | Small | Hybrid | Pale-Lavender | July into August | Benedict, Dr Ralph (Herb) | .1983 |
| 'Betty Hagerman' | Giant | Hybrid | - | June into July | Kwick, Charles | .2016 |
| 'Betty Hammond' | Large | Unknown | - | - | Zumach, Hank | --NR-- |
| 'Betty Hill' | - | Hybrid | Light-Purple | July into August | Unknown | --NR-- |
| 'Betty Owens' | Small | Unknown | - | - | Owens, Clarence | --NR-- |
| 'Bianca' | Medium | Unknown | - | - | Pagels, Ernst | --NR-- |
| 'Big B' | Large | Hybrid | - | August to September | Kwick, Charles | .2016 |
| 'Big Bang' | Large | Unknown | Pale-Lavender | July | Fransen, Marco & Fransen, Joyce | --NR-- |
| 'Big Ben' | Large | Hybrid | - | - | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Big Bloomers' | Large | Hybrid | Pure-White | August to September | Avent, Tony | --NR-- |
| 'Big Bopper' | Medium | Hybrid | Near-White | - | Wasitis, Chick | --NR-- |
| 'Big Boy' | Giant | Hybrid | Pale-Lavender | July | Simpers, Lucille | .1986 |
| 'Big Bubba' | Giant | Hybrid | Near-White | June into July | Hanna, Clarence | .2018 |
| 'Big Deal' | Large | Unknown | - | June into July | Ward, Dr Dick & Ward, Jane | .2015 |
| 'Big Dude' | Giant | Hybrid | Pale-Lavender | June into July | Balitewicz, Bob | --NR-- |
| 'Big Hearted' (Benedict) | Medium | Hybrid | Pale-Lavender | July | Benedict, Dr Ralph (Herb) | .1983 |
| 'Big Hearted Two' | Giant | Unknown | - | - | Miller, Jeff | --NR-- |
| 'Big Horn' | Large | Unknown | - | - | Spencer, Jim | --NR-- |
| 'Big John' | Giant | Hybrid | Near-White | June into July | Owens, Clarence | .1986 |
| 'Big Sam' | Giant | Hybrid | Pale-Lavender | - | Klopping, Minnie | .1986 |
| 'Big Shot' | Large | Unknown | Med-Lavender | July | Arett, Anne & Minks, Eldren | .1992 |
| 'Big Stuff' | Giant | Unknown | Near-White | July | Freeman, Franc & Freeman, Sally | --NR-- |
| 'Big Swede' | - | Unknown | - | - | Van Ostrand, John | --NR-- |
| 'Biggie' | Giant | Hybrid | Pale-Lavender | July into August | Elslager, Ed | .2003 |
| 'Bill Modrak' | Medium | Hybrid | Light-Purple | July into August | Zolock, Steve & Zolock, Sarah | .2002 |
| 'Billie Holiday' | Medium | Hybrid | Pale-Lavender | August | Husemann, Jim | .2019 |
| 'Billy Bob Angel' | Large | Hybrid | - | June into July | Zilis, Mark | .2010 |
| 'Birchwood Gem' | Small | Unknown | Light-Purple | July | Shaw, Florence & Ruh, Peter | .1989 |
| 'Birchwood Green' | Large | Hybrid | Near-White | June into July | Shaw, Florence | .1986 |
| 'Birchwood Ripples' | Large | Unknown | - | - | Shaw, Florence | --NR-- |
| 'Birchwood Ruffled Queen' | Large | Hybrid | Pale-Lavender | June into July | Shaw, Florence | .1986 |
| 'Birthday Cake' | Medium | Hybrid | Med-Lavender | August | Avent, Tony | .2007 |
| 'Bitsy Green' | Miniature | Hybrid | Pale-Lavender | - | Savory, Robert | .1985 |
| 'Bizzard Garcia' | Medium | Hybrid | - | - | Unknown | --NR-- |
| 'Black Adder' | Medium | Unknown | - | - | Janssen, Bill | --NR-- |
| 'Black Beauty' | Medium | Hybrid | Pale-Lavender | July into August | Carpenter, Kate | .1984 |
| 'Black Belgium' | Medium | Unknown | Near-White | July into August | Vertz, Mary | .2020 |
| 'Black Forest' (Tompkins) | Large | Unknown | Med-Lavender | - | Tompkins, Chet & Ruh, Peter | .2005 |
| 'Black Heart' | Medium | Unknown | - | - | Unknown | --NR-- |
| 'Black Hills' | Large | Hybrid | Pale-Lavender | June into July | Savory, Robert | .1983 |
| 'Black Jack Chew' | Medium | TC Sport | Light-Purple | July | Schwarz, Jim | .2005 |
| 'Black Light' | Medium | Hybrid | Pale-Lavender | July into August | Van Eechaute, Danny | .2015 |
| 'Black Mamba' | Medium | Hybrid | Light-Purple | August | Livingston, Ron | --NR-- |
| 'Black Pearl' | Medium | Hybrid | Med-Lavender | June into July | Cross, Peter | .2001 |
| 'Black Pod' | Small | Hybrid | - | - | Fisher, Eunice V. & Lewis | --NR-- |
| 'Black Queen' | Medium | Unknown | Light-Purple | August | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Blackberry Turnover' | Large | Unknown | - | - | Ziarek, Ken | --NR-- |
| 'Blackfoot' | Small | Hybrid | Pale-Lavender | July | Plater-Zyberk, Maria & Solberg, Robert | .1994 |
| 'Blackhawk' | Giant | Unknown | Pale-Lavender | June into July | Fox, Bob & Fox, G. | .2019 |
| 'Blarney Stone' | Giant | Unknown | Near-White | - | Goodenough, Rick | --NR-- |
| 'Blaugold' | Large | Hybrid | Light-Purple | July | Klose, Heinz & Ruh, Peter | .1991 |
| 'Blitzkrieg Bop' | Small | Unknown | - | - | Stadden, John | --NR-- |
| 'Blonde Ambition' | Small | Hybrid | - | - | Avent, Tony | --NR-- |
| 'Blonde Impressions' | Large | Hybrid | Pale-Lavender | July | Balitewicz, Bob | --NR-- |
| 'Bloodline' | Medium | Hybrid | Light-Purple | August to September | Ruff, Doug | .2019 |
| 'Bloody Mary' | Large | Hybrid | Deep-Purple | August | Sugita, Hajime & Ruh, Peter | .1999 |
| 'Blooming Fool' | Large | Unknown | Med-Lavender | July | Schulz, Ed | .2002 |
| 'Blue Ridge' | Giant | Sport | Pale-Lavender | June into July | Solberg, Robert | .2009 |
| 'Blue Suede Shoes' | Medium | Hybrid | Pale-Lavender | July into August | Elslager, Ed | .2001 |
| 'Blue Umbrellas' | Giant | Hybrid | Pale-Lavender | June into July | Shaw, Florence & Aden, Paul | .1976 |
| 'Blue without You' | Large | Sport | Pale-Lavender | July into August | Kordner, Tim | .2000 |
| 'Blueberry Waffles' | Giant | Hybrid | Pale-Lavender | June into July | Brown, Sandy | .2008 |
| 'Blӓuling' | Medium | Unknown | - | - | Kohlein, Fritz | --NR-- |
| 'Blushing Bride' | Large | Hybrid | Med-Lavender | August to October | Hansen, Hans | .2007 |
| 'Blutenspiel' | Medium | Unknown | Light-Purple | August | Klose, Heinz & Ruh, Peter & Ruh, Jean | .2003 |
| 'Blythe Spirit' | Medium | Unknown | Pale-Lavender | August to October | Schenk, George & Ruh, Peter | .1990 |
| 'Bob' | Giant | Hybrid | - | - | Avent, Tony | --NR-- |
| 'Bob's Perfection' | - | Unknown | - | - | Unknown | --NR-- |
| 'Bohemia Quill Bill' | Medium | Hybrid | Med-Lavender | July into August | Mirka, Vladimir | .2017 |
| 'Bolt' | Giant | Hybrid | Pale-Lavender | - | Gilligan, Madelon | .2012 |
| 'Bombs Bursting in Air' | Large | Hybrid | Pale-Lavender | September | Stegeman, Bev & Stegeman, Dave | .2012 |
| 'Bon Voyage' | Medium | Hybrid | Near-White | June into July | Minks, Eldren | .1980 |
| 'Bonanza' | Large | Unknown | Med-Lavender | July | Nesmith, Elizabeth & Ruh, Peter | .1997 |
| 'Bonfire' | Small | Sport | Med-Lavender | August | Fransen, Marco & Fransen, Joyce | --NR-- |
| 'Borderline' | Small | Unknown | - | August to September | Bastille, Jocelyne | --NR-- |
| 'Borsch 4' | Large | Unknown | Pale-Lavender | July into August | Borsch, Wm & Ruh, Peter & Ruh, Jean | .2005 |
| 'Botanical Look' | Medium | Unknown | - | - | Van Eechaute, Danny | --NR-- |
| 'Bottle Rockets' | Medium | Hybrid | Light-Purple | August to September | Bowe, Dave | .2021 |
| 'Bountiful' | Medium | Hybrid | Light-Purple | July | Fisher, Eunice V. | .1971 |
| 'Bouquet' | Medium | Hybrid | Med-Lavender | July | Moldovan, Steve & Walek, Kevin | .2009 |
| 'Boy Shooting Arrows' | Medium | Hybrid | Pale-Lavender | September | Nyikos, Frank | .2011 |
| 'Branching Out' | Medium | Hybrid | Near-White | July into September | Avent, Tony | .2012 |
| 'Brandywine' | Miniature | Hybrid | Light-Purple | August | Herold, Roy | .1993 |
| 'Braveheart' | Medium | TC Sport | Pale-Lavender | August | Wasitis, Chick | --NR-- |
| 'Bravo All Green' | Medium | Sport | Near-White | July | Wade, Van | --NR-- |
| 'Brecksville' | - | Unknown | - | - | Kuk, Bob | --NR-- |
| 'Brent' | Large | Unknown | Near-White | June into July | Wade, Van | --NR-- |
| 'Bri Bear' | Miniature | Unknown | Deep-Purple | July into August | Asch, Stuart | .2009 |
| 'Brick Back' | Medium | Hybrid | - | - | Zolock, Steve & Zolock, Sarah | .2010 |
| 'Bridegroom' | Medium | Hybrid | Deep-Purple | July | Benedict, Dr Ralph (Herb) & Gowen, Hideko | .1990 |
| 'Brigadier' | Large | Hybrid | Pale-Lavender | June into July | Zilis, Mark | .2003 |
| 'Bright Flash' | Small | Unknown | - | - | Isaacs, Charles | --NR-- |
| 'Broad Avenue Beauty' | Small | Unknown | Med-Lavender | June into September | Zolock, Steve & Zolock, Sarah | .2008 |
| 'Brodie's Bonanza' | Small | Hybrid | Pale-Lavender | September | Goodwin, Randy | .2013 |
| 'Brooke' | Large | Unknown | Pale-Lavender | July | Stone, David & Ruh, Peter | .1987 |
| 'Brooklynn's Baby Doll' | Small | Hybrid | Pale-Lavender | June into July | DaPra, Sarah & Walek, Kevin | .2007 |
| 'Brother Jack' | Medium | Unknown | Light-Purple | August | Kwick, Charles | .2017 |
| 'Brother Streaker' | Medium | Unknown | Light-Purple | July into August | Wade, Van | --NR-- |
| 'Bruce' | Small | Unknown | Med-Lavender | June into July | Stone, David & Ruh, Peter | .2002 |
| 'Brussels Waffles' | Large | Unknown | - | - | Van Eechaute, Danny | --NR-- |
| 'Brutus' | Giant | Hybrid | Light-Purple | July into August | Beilstein, Doug | .2007 |
| 'Brutus Buckeye' | Giant | Unknown | - | June into July | Wade, Van & Ward, Dr Dick & Ward, Jane | .2015 |
| 'Bryce' | Medium | Unknown | Med-Lavender | August to September | Tompkins, Chet & Ruh, Peter | .2002 |
| 'Bubba' | Small | Hybrid | Pale-Lavender | June into July | Avent, Tony | .1998 |
| 'Bubbling Spring' | Large | Unknown | - | - | Kruer, George | .2009 |
| 'Buckaroo' | Medium | Unknown | - | June into July | Duncan, Mary Jo | .2014 |
| 'Buckwheat Honey' | Small | Hybrid | Pale-Lavender | July into August | Benedict, Dr Ralph (Herb) | .1984 |
| 'Bud Lite' | Large | Hybrid | - | - | Beilstein, Doug & Beilstein, Mardy & Rogers, Floyd | .2017 |
| 'Burgundy Bermudas' | Medium | Hybrid | Light-Purple | August to September | Goodwin, Randy | .2013 |
| 'Busia's Choice' | Miniature | Hybrid | Pale-Lavender | September | Savory, Dennis | .2015 |
| 'Butterball' | Small | Unknown | - | - | Goodwin, Randy | --NR-- |
| 'Butternut Hill' | Large | Hybrid | Pale-Lavender | July into August | Englerth, Lawrence & Ruh, Peter & Ruh, Jean | .2001 |
| 'Butterpot' | - | Unknown | - | - | Unknown | --NR-- |
| 'Buzzard's Bay' | Large | Sport | Pale-Lavender | July | Malloy, Alex | .1999 |
| 'Byakuro' | Small | Sport | Near-White | - | Unknown | --NR-- |
|