Hosta "King John" information:
| Size Category | very large |
| Hosta height x width | 90x120 cm (35x47 in.) inches |
| Leaf length x width | 30x23 cm (12x9 in.) inches |
| Vein pairs | 15-17 |
| Leaf color | |
| Variegation | |
| Leaf type | corrugated |
| Petiole | corrugated |
| Scape | blue-green |
| Scape height | 100 cm (39 in.) |
| Flower | pale lavender |
| Fragrant | |
| Flower length | |
| Flowering period | July - August |
| Fertile | yes |
| Pod | green |
| Ploidy | |
| Patents | |
| Sports | |
| Progeny |
