| Hosta | The Mighty Koo Yai |
| Status | registered |
| Originator(s) | Charlie Kwick 2019 |
| Origin | sieboldiana 'Elegans' x 'Satisfaction' |
| Size category | very large |
| Plant height x width | 80x150 cm (31x59 in.) |
| Leaf length x width | 41x33 cm (16x13 in.) |
| Vein pairs | 15-16 |
| Leaf color | |
| Variegation | |
| Leaf | corrugated |
| Petiole | |
| Scape | light green |
| Scape height | 90 cm (35 in.) |
| Flower | lavender |
| Flower length | 6.5 cm (2.6 in.) |
| Fragrant | N |
| Flowering period | June - July |
| Fertile | |
| Pod | |
| Ploidy | |
| Patents | |
| Info | This is a mighty, huge, upright plant with large corrugated green leaves. |
| Sports | |
| Progeny | |