H. ‘Blue Hour’
Hosta ‘Blue Hour’ is a registered cultivar () .
| Year registered | 2009 |
|---|---|
| Section class | I-2 (Giant) |
Overview
Registered in 2009, *Hosta* 'Blue Hour' is a giant hosta of unknown parentage, distinguished by its intensely blue-green, heavily corrugated leaves and near-white flowers. The cultivar forms a substantial mound of broadly ovate, lightly cupped foliage with slightly rippled margins and a dull surface on both sides.
In the Garden
'Blue Hour' reaches a mature diameter of 48 inches (121.9 cm) and a height of 30 inches (76.2 cm), with a moderate growth rate. It performs best in partial to full shade, typical for blue-leaved hostas, where its blue coloration is most pronounced. The large, textured foliage pairs well with ferns, heucheras, and other shade perennials; its size makes it suitable as a specimen or in the middle to back of a shaded border.
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 some resistance to slugs, though monitoring is advisable in damp conditions; deer may browse the foliage.
Size and leaf
| Clump height | 30 in (76.2 cm) |
|---|---|
| Clump width | 48 in (121.9 cm) |
| Leaf length | 13 in (33 cm) |
| Leaf width | 10 in (25.4 cm) |
| Vein pairs | 15 |
| Leaf | intensely blue-green slightly rippled margins; dull on top; dull underneath; lightly cupped, lightly wavy |
| Flower scape height | 28 in (71.1 cm) |
| Seasonal colour change | greens up later in the season |
| Notable characteristics | heavy blue corrugated leaves, near white flower |
From the American Hosta Society Registry record.
Similar cultivars
Other registered hostas in the same AHS section class (I-2, giant size):
- H. ‘Blue Mammoth’ (2010)
- H. ‘Coal Miner’ (2010)
- H. ‘Groo Bloo’ (2010)
- H. ‘Mike’ (2010)
- H. ‘So Big’ (2010)
- H. ‘Clear Fork River Valley’ (2007)
Related guides
Registration data: AHS Registry #617