| Cultivar Name | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Babbling Brook' | Giant | Med-Green | - | - | Hybrid | Pale-Lavender | - | Vaughn, Kevin & Walek, Kevin & The American Hosta Society | .2009 |
| 'Back Bay' | Giant | Blue/Green | - | - | Hybrid | Near-White | June into July | Vaughn, Kevin & Walek, Kevin & The American Hosta Society | .2009 |
| 'Barcelona Harbor' | Large | Blue/Green | - | - | Unknown | - | - | Lydell, Ransom | --NR-- |
| 'Bayside Regal' | Medium | Dark-Green | - | - | Hybrid | Light-Purple | July into August | Hicks, Gerry | .2015 |
| 'Beach Boy' | Medium | Blue/Green | Medial | White | Sport | Pure-White | July into August | Heemskerk, Gerardus | .2011 |
| 'Beach Party' | Large | Blue/Green | - | - | TC Sport | Near-White | July into August | Zilis, Mark | .2009 |
| 'Black Bay' | - | - | - | - | Hybrid | - | - | Unknown | --NR-- |
| 'Blue Danube' | Small | Blue/Green | - | - | Unknown | Pale-Lavender | July | Smith, Eric & British Hosta and Hemerocallis Society | .1988 |
| 'Blue River' | Small | Blue/Green | Marginal | Yellow | Sport | Near-White | June into July | Reath, David | .1998 |
| 'Blue Waves' | - | Blue/Green | - | - | Unknown | - | - | Benedict, Dr Ralph (Herb) | --NR-- |
| 'Bohemia Romantic Waterfall' | Large | Med-Green | Marginal | White | Unknown | Pale-Lavender | | Mirka, Vladimir | --NR-- |
| 'Bohemia Wild Waterfall' | Medium | Med-Green | Marginal | Yellow | Unknown | | | Mirka, Vladimir | --NR-- |
| 'Botters Sparkling Water' | Large | Blue/Green | | | Unknown | | | Veenstra, Gerrie | --NR-- |
| 'Boundary Waters' | Large | Blue/Green | - | - | Unknown | Near-White | July | Olson, Tom | .1999 |
| 'Bridal Falls' | Large | Dark-Green | Marginal | White | TC Sport | Pale-Lavender | July into August | Van den Top, Jan & Walters Gardens | .2012 |
| 'Buffalo Misty Mouse' | Miniature | Blue/Green | Streaked | Yellow | Nat-Sport | Med-Lavender | July | Zubrik, Dana & Zubrik, Milan | .2022 |
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