H. ‘Rosedale Black Hole’

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.