H. ‘King's Black Knight’
Hosta ‘King's Black Knight’ is a registered cultivar () .
| Year registered | 2006 |
|---|---|
| Section class | II-1 (Large) |
Overview
Registered in 2006, *Hosta* 'King's Black Knight' is a large, mound-forming cultivar of unknown pollen parentage, with *H.* 'Grand Master' as its pod parent. It is visually distinctive for its nearly round, very dark blue-green leaves that are thick-textured, moderately corrugated, and bear a glaucous bloom on the undersides, creating a dense, striking mound.
In the Garden
'King's Black Knight' forms a substantial mound 46 inches (117 cm) in diameter and 20 inches (51 cm) tall, with a moderate growth rate. Its thick, dark leaves tolerate more sun than many blue-leaved hostas, though it performs best in partial to full shade in typical hosta-growing zones. It pairs well with ferns, astilbes, and other shade perennials that contrast with its dark foliage.
Care Notes
Water regularly to maintain consistent moisture, especially during dry periods. Fertilize in early spring as new growth emerges. The thick leaves offer some resistance to slugs, but standard slug control measures are advisable in damp conditions. Deer may browse the foliage.
Size and leaf
| Clump height | 20 in (50.8 cm) |
|---|---|
| Clump width | 46 in (116.8 cm) |
| Leaf length | 9 in (22.9 cm) |
| Leaf width | 8 in (20.3 cm) |
| Vein pairs | 10 |
| Leaf | dark green flat margins; slightly shiny on top; glaucous bloom underneath; moderately cupped, moderately twisted, moderately corrugated |
| Flower scape height | 18–28 in (45.7–71.1 cm) |
| Notable characteristics | very dark shiny green, thick textured, corrugated leaves make a striking mound. |
From the American Hosta Society Registry record.
Parentage
- Pod parent: H. 'Grand Master' — H. ‘Grand Master’
Similar cultivars
Other registered hostas in the same AHS section class (II-1, large size):
- H. ‘Aphrodite’ (2009)
- H. ‘Foxfire Irish Moon’ (2003)
- H. ‘Ben’ (2015)
- H. ‘Tracy's Emerald Cup’ (1997)
- H. ‘Willy Nilly’ (1996)
- H. ‘Duke’ (1988)
Related guides
Registration data: AHS Registry #3035