H. ‘Rosedale Black Hole’
Hosta ‘Rosedale Black Hole’ is a registered cultivar () .
| Year registered | 2000 |
|---|---|
| Section class | I-2 (Giant) |
Overview
Registered in 2000 by R. D. Bunch, this giant blue-green hosta is a product of controlled crosses between unnamed seedlings (pod parent 'RD-BS', pollen parent 'RD-742'). Its most distinctive feature is the exceptionally large leaf size—13 inches (33.0 cm) long by 10 inches (25.4 cm) wide—with medium blue-green margins that contrast with a darker, deeply impressed center, creating a "black hole" effect from which the cultivar derives its name.
In the Garden
'Rosedale Black Hole' reaches giant proportions, forming a substantial clump 3 to 4 feet in height and 4 to 5 feet in spread at maturity. It performs best in partial to full shade, where the blue-green foliage retains its color and the leaf texture is most pronounced. This cultivar serves as a bold specimen or focal point in shaded borders and woodland gardens; its massive leaves pair well with fine-textured ferns or the upright foliage of Iris species. Due to its size, it is not suitable for container culture.
Care Notes
Provide consistent moisture, especially during dry periods, and apply a balanced slow-release fertilizer in early spring as new growth emerges. Standard slug and deer precautions are recommended, as the large, tender leaves are attractive to both pests.
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
| Leaf length | 13 in (33 cm) |
|---|---|
| Leaf width | 10 in (25.4 cm) |
From the American Hosta Society Registry record.
Parentage
- Pod parent: H. 'RD-BS'
- Pollen parent: H. 'RD-742'
Registered cultivars that list Hosta ‘Rosedale Black Hole’ as a parent:
- H. ‘Capricorn’ (seedling (pod parent))
- H. ‘Gandy Dancer’ (seedling (pod parent))
- H. ‘Lela's Quilt’ (seedling (pod parent))
- H. ‘Pluto’ (seedling (pod parent))
- H. ‘Sagittarius’ (seedling (pod parent))
- H. ‘Scorpio’ (seedling (pod parent))
- H. ‘Taurus’ (seedling (pod parent))
Similar cultivars
Other registered hostas in the same AHS section class (I-2, giant size):
- H. ‘Abiqua Elephant Ears’ (1999)
- H. ‘Gentle Giant’ (2005)
- H. ‘Kong’ (1990)
- H. ‘Helen Doriot’ (1982)
- H. ‘Krossa Regal’ (1980)
- H. ‘Big and Blue’ (2000)
Related guides
Registration data: AHS Registry #4749. How we check this data.