| Hosta | Allegan Emperor |
| Status | registered |
| Originator(s) | H. Deshane/Ken Herrema/Pete Ruh 2000 |
| Origin | nigrescens hybrid |
| Size category | large |
| Plant height x width | 75x180 cm (30x71 in.) |
| Leaf length x width | 36x25 cm (14x10 in.) |
| Vein pairs | 12-14 |
| Leaf color | blue>green |
| Variegation | |
| Leaf | thick |
| Petiole | |
| Scape | green |
| Scape height | 120 cm (47 in.) |
| Flower | lavender,striped,tubular |
| Flower length | 5 cm (2 in.) |
| Fragrant | |
| Flowering period | June - July |
| Fertile | yes |
| Pod | |
| Ploidy | |
| Patents | |
| Info | Forms a huge, vase-shaped mound of foliage that changes from bluish green in spring to a shiny, dark green by July; great choice as a background or specimen plant. |
| Sports | |
| Progeny | |