| Hosta | Jay Jay |
| Status | registered |
| Originator(s) | J. J. Grullemans/Pete Ruh 1994 |
| Origin | sieboldiana hybrid |
| Size category | xtra large |
| Plant height x width | 65x85 cm (26x33 in.) |
| Leaf length x width | 33x29 cm (13x11 in.) |
| Vein pairs | 16 |
| Leaf color | blue-green |
| Variegation | |
| Leaf | good, corrugated |
| Petiole | |
| Scape | blue-green |
| Scape height | 95 cm (37 in.) |
| Flower | near white,bell |
| Flower length | 4 cm (1.6 in.) |
| Fragrant | |
| Flowering period | June - July |
| Fertile | yes |
| Pod | |
| Ploidy | |
| Patents | |
| Info | A blue sieboldiana. |
| Sports | |
| Progeny | |