H. ‘Blackjack’
Hosta ‘Blackjack’ is a registered cultivar () , originated by C. Owens.
| Year registered | 1990 |
|---|---|
| Registrant | C. Owens |
| Section class | I-1 (Giant) |
Overview
Registered in 1990 by C. Owens, this giant variegated hosta resulted from a cross between H. 'Mira' (pod parent) and H. sieboldiana (pollen parent). 'Blackjack' is visually distinctive for its very large, heavily textured leaves with dark green margins and a broad, irregular yellow to cream center that matures to white.
In the Garden
'Blackjack' forms a substantial clump reaching 24 inches (61.0 cm) in height and 58 inches (147.3 cm) in diameter, making it suitable as a specimen or background plant in shaded borders. It performs best in partial to full shade, where the variegation remains stable, and pairs well with ferns, Heuchera, and other shade-tolerant perennials. Its giant size precludes container cultivation for most gardeners.
Care Notes
Provide consistent moisture, especially during dry periods, and apply a balanced fertilizer in early spring as new growth emerges. Like most large-leaved hostas, 'Blackjack' is susceptible to slug and deer damage; regular monitoring and appropriate controls are recommended.
This summary was generated with AI from the registry record and has not been reviewed yet; the registry data on this page is the reference. How we use AI.
Size and leaf
| Clump height | 24 in (61 cm) |
|---|---|
| Clump width | 58 in (147.3 cm) |
| Leaf length | 15.5 in (39.4 cm) |
| Leaf width | 14 in (35.6 cm) |
| Vein pairs | 19 |
| Flower scape height | 30 in (76.2 cm) |
From the American Hosta Society Registry record.
Parentage
- Pod parent: H. 'Mira' — H. ‘Mira’
- Pollen parent: H. sieboldiana
Similar cultivars
Other registered hostas in the same AHS section class (I-1, giant size):
- H. ‘King James’ (1992)
- H. ‘Green Dragonet’ (1999)
- H. ‘Empress Wu’ (2008)
- H. ‘Armani’ (2015)
- H. ‘Green Angel’ (1990)
- H. ‘Mount Fuji’ (1989)
Related guides
Registration data: AHS Registry #547. How we check this data.