H. ‘Sea Blue’
Hosta ‘Sea Blue’ is a registered cultivar () , originated by M. Seaver.
| Year registered | 1978 |
|---|---|
| Registrant | M. Seaver |
| Section class | I-2 (Giant) |
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.
Size and leaf
| Clump height | 10 in (25.4 cm) |
|---|---|
| Clump width | 23 in (58.4 cm) |
| Leaf length | 21 in (53.3 cm) |
| Leaf width | 9.5 in (24.1 cm) |
| Vein pairs | 13 |
| Leaf | blue green single undulation margins |
| Flower scape height | 23 in (58.4 cm) |
From the American Hosta Society Registry record.
Parentage
- Pod parent: Hybrid of H. 'Frances Williams' — H. ‘Frances Williams’
Similar cultivars
Other registered hostas in the same AHS section class (I-2, giant size):
- H. ‘Big Daddy’ (1978)
- H. ‘Big Mama’ (1978)
- H. ‘Blue Umbrellas’ (1978)
- H. ‘Krossa Regal’ (1980)
- H. ‘Helen Doriot’ (1982)
- H. ‘Great Lakes’ (1973)
Related guides
Registration data: AHS Registry #4985