H. ‘Cornerstone’
Hosta ‘Cornerstone’ is a registered cultivar () .
| Year registered | 2013 |
|---|---|
| Section class | I-2 (Giant) |
Overview
Registered in 2013 as an open-pollinated seedling, Hosta 'Cornerstone' is a giant cultivar distinguished by its exceptionally large, upright mound of heavily textured blue-green leaves. The foliage is notable for its extreme folding at the leaf base, pointed twisted tips, and a glaucous bloom that persists on both surfaces, with color retention extending into late summer.
In the Garden
With a mature spread of 74 inches (188 cm) and height of 40 inches (102 cm), 'Cornerstone' functions as a substantial specimen plant in the landscape. Its upright, fast-growing habit suits it for placement at the back of shaded borders or as a focal point in large woodland gardens. The substantial leaves pair well with ferns, Heuchera, and other shade-tolerant perennials; the cultivar is not suited for container cultivation due to its size.
Care Notes
Provide consistent moisture during establishment and throughout the growing season, applying a balanced slow-release fertilizer in early spring. Typical hosta-growing zones apply; the thick, corrugated leaves show moderate slug resistance, though monitoring is advised in damp conditions.
This summary was generated with AI from the registry record and has not been reviewed yet; the registry data on this page is the reference. How we use AI.
Size and leaf
| Clump height | 40 in (101.6 cm) |
|---|---|
| Clump width | 74 in (188 cm) |
| Leaf length | 16 in (40.6 cm) |
| Leaf width | 12 in (30.5 cm) |
| Vein pairs | 17 |
| Leaf | medium blue-green flat margins; glaucous bloom on top; glaucous bloom underneath; moderately cupped, lightly folded, moderately corrugated |
| Flower scape height | 48–60 in (121.9–152.4 cm) |
| Notable characteristics | huge upright mound, holds color until late summer, extremely folded leaf base, pointed twisted tips |
From the American Hosta Society Registry record.
Parentage
- Pollen parent: OP
Similar cultivars
Other registered hostas in the same AHS section class (I-2, giant size):
- H. ‘Gentle Giant’ (2005)
- H. ‘Abiqua Elephant Ears’ (1999)
- H. ‘Kong’ (1990)
- H. ‘Helen Doriot’ (1982)
- H. ‘Krossa Regal’ (1980)
- H. ‘Gray Wolf’ (2013)
Related guides
Registration data: AHS Registry #1165. How we check this data.