H. ‘Blue Rock’

Overview

Registered in 1986 by D. Stone and E. Fisher through the American Hosta Society, this large blue-green cultivar is distinguished by its broad, heavily textured leaves with dark blue-green margins and prominent veining. The parentage is unknown, but the plant forms a substantial mound reaching 18 inches (45.7 cm) in height and 43 inches (109.2 cm) in diameter.

In the Garden

'Blue Rock' performs best in partial to full shade, where its blue-green foliage maintains its color intensity throughout the growing season. At maturity, it forms a large, dense clump suitable for mid-border positions or as a specimen in woodland gardens. The substantial leaves pair well with ferns, astilbes, and other shade-tolerant perennials that contrast in texture or form.

Care Notes

Provide consistent moisture during dry periods, particularly in the first growing season. Apply a balanced slow-release fertilizer in early spring as new growth emerges. Like most large-leaved hostas, 'Blue Rock' is susceptible to slug and deer damage; protective measures may be necessary in areas where these pests are prevalent.