| Baptisia australis |
| Berberis thunbergii "Bagatelle" |
| Bergenia |
| Bletilla striata |
| Briza media limocezi |
| Brunnera macrophylla |
| Brunnera macrophylla Betty Bowring |
| Brunnera macrophylla Jack Frost |
| Buddleja davidii "Black Knight" |
| Buddleya davidii "Nanho Purple" |
| Buphthalmum salicifolium |