H. ‘Midnight Hour’
Hosta ‘Midnight Hour’ is a registered cultivar () .
| Year registered | 2009 |
|---|---|
| Section class | I-2 (Giant) |
Overview
Registered in 2009 from unknown parentage, Hosta 'Midnight Hour' is a giant cultivar distinguished by its intensely corrugated, nearly round leaves of deep blue-green with slightly rippled margins. The leaves reach 15.5 inches (39.4 cm) in length and 9.5 inches (24.1 cm) in width, with 14 pairs of veins and a dull surface on both sides.
In the Garden
This cultivar forms a dense, mound-like clump reaching 36 inches (91.4 cm) in height and 54 inches (137.2 cm) in diameter, with a moderate growth rate. It performs best in partial to full shade, as is typical for blue-leaved hostas, where the blue coloration is best preserved. Its substantial size makes it suitable as a specimen plant or as a backdrop for smaller perennials such as ferns, heucheras, or astilbes. The green scapes rise to 38 inches (96.5 cm) and bear prolific flowers.
Care Notes
Provide consistent moisture, especially during dry periods, and apply a balanced fertilizer in early spring as new growth emerges. The thick, corrugated leaves offer moderate resistance to slugs, though standard slug control measures may still be warranted in damp conditions. Deer may browse this cultivar, as with most hostas.
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 | 36 in (91.4 cm) |
|---|---|
| Clump width | 54 in (137.2 cm) |
| Leaf length | 15.5 in (39.4 cm) |
| Leaf width | 9.5 in (24.1 cm) |
| Vein pairs | 14 |
| Leaf | intensely blue-green slightly rippled margins; dull on top; dull underneath; intensely corrugated |
| Flower scape height | 38 in (96.5 cm) |
| Seasonal colour change | greens up later |
| Notable characteristics | very corrugated blue leaves, prolific flowers |
From the American Hosta Society Registry record.
Parentage
Registered cultivars that list Hosta ‘Midnight Hour’ as a parent:
- H. ‘Lady in Blue’ (seedling (pod parent))
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. ‘Alligator Hide’ (2009)
Related guides
Registration data: AHS Registry #3737. How we check this data.