| Hosta | Mary Lou |
| Status | registered |
| Originator(s) | Pauline Banyai 1986 |
| Origin | unknown |
| Size category | medium - large |
| Plant height x width | |
| Leaf length x width | |
| Vein pairs | 10 |
| Leaf color | blue>green |
| Variegation | |
| Leaf | heavy, waxy |
| Petiole | |
| Scape | leafy bracts |
| Scape height | 90 cm (35 in.) |
| Flower | white |
| Flower length | 5 cm (2 in.) |
| Fragrant | |
| Flowering period | June - July |
| Fertile | |
| Pod | |
| Ploidy | |
| Patents | |
| Info | Blue-green. Large, leaves very blue turning to medium green, heavy waxy texture, white flowers in June and July. |
| Sports | |
| Progeny | |