| Hosta | Grand Slam |
| Status | registered |
| Originator(s) | Herb Benedict/Hideko Gowen 1990 |
| Origin | unknown |
| Size category | small - medium |
| Plant height x width | 25x65 cm (10x26 in.) |
| Leaf length x width | 18x15 cm (7x6 in.) |
| Vein pairs | 9 |
| Leaf color | dark green |
| Variegation | |
| Leaf | glossy, leathery |
| Petiole | purple dotted |
| Scape | |
| Scape height | |
| Flower | dark violet |
| Flower length | |
| Fragrant | |
| Flowering period | September - October |
| Fertile | yes |
| Pod | |
| Ploidy | |
| Patents | |
| Info | Broad glossy leathery. Dark green. A tremendous plant, the broad, dark green leaves are glossy and very leathery with attractive undulation along the margin. Purple dotting on the petioles and scapes. A select form of H. longpipes var. latifolia. Dense flower heads of dark violet. This is a fantastic hosta. Very dark, leathery leaves with pronounced marginal undulations. It is the latest flowering hosta we grow....blooms appear in September. |
| Sports | |
| Progeny | 'Brocade' seedling 'Brodie's Bonanza' seedling 'Celtic Dancer' = PP x 'Party Favor' 'Chrystal Blue' = PP x 'Halcyon' 'Freeroll' seedling 'Frisian Waving Steel' = PP x 'Sky Dancer' 'Kempen Dark Lipstick' seedling 'Little Slam' seedling 'Mighty Mite' seedling 'Mill' seedling 'Mill's Grand Coup' seedling 'Mill's Last Train' seedling 'Mill's Master' seedling 'Mill's Repechage' seedling 'Mill's Roth-Stone' seedling 'Mill's Trump Suit' seedling 'Slam Dunk' hybrid 'Storm' = PP x 'Crested Surf' |