H. ‘Sea Monster’

Overview

Registered in 1978, 'Sea Monster' is a giant blue-green hosta cultivar of unknown parentage. It is visually distinctive for its heavily corrugated, nearly round leaves with medium green margins, a moderate glaucous bloom on the undersides, and a cordate base.

In the Garden

This cultivar reaches 24 inches (61.0 cm) in height and spreads to 46 inches (116.8 cm) in diameter, making it suitable as a bold specimen or focal point in shaded borders and woodland gardens. It performs best in partial to full shade, where its blue-green foliage retains its color, and pairs well with ferns, astilbes, and other shade-tolerant perennials. Its substantial size and corrugated texture also provide strong contrast alongside finer-textured plants.

Care Notes

Provide consistent moisture, especially during dry periods, and apply a balanced fertilizer in early spring as new growth emerges. Slugs and deer may damage the foliage, so monitoring and appropriate controls are recommended in typical hosta-growing zones.