H. ‘Sea Blue’

Overview

Registered in 1978 by M. Seaver, this giant blue-green hosta was developed from a hybrid of *H. 'Frances Williams'*. 'Sea Blue' is visually distinctive for its exceptionally large, cordate leaves with blue-green coloration, single undulation margins, and 13 vein pairs, reaching 21 inches (53.3 cm) in length and 9.5 inches (24.1 cm) in width.

In the Garden

'Sea Blue' forms a substantial clump 23 inches (58.4 cm) in diameter and 10 inches (25.4 cm) in height, making it suitable as a specimen or background plant in shaded borders. It performs best in partial to full shade, where its blue-green foliage retains color intensity. Companion plants include ferns, astilbes, and other shade-tolerant perennials; its large scale precludes container cultivation.

Care Notes

Provide consistent moisture, particularly during dry periods, and apply a balanced fertilizer in early spring as growth emerges. Like most large-leaved hostas, 'Sea Blue' is susceptible to slug and deer damage; monitor regularly and employ control measures as needed.