H. ‘Valley's Magnum’
Hosta ‘Valley's Magnum’ is a registered cultivar () .
| Year registered | 2015 |
|---|---|
| Section class | I-2 (Giant) |
Overview
Registered in 2015, *Hosta* 'Valley's Magnum' is a giant blue-green cultivar derived from *Hosta* 'Empress Wu' as the pod parent, with an unknown pollen parent. It is visually distinctive for its intensely blue-green, heavily rippled leaf margins, thick leaf substance, white leaf undersides, and exceptionally large, broadly ovate leaves that are lightly cupped and deeply wavy.
In the Garden
'Valley's Magnum' reaches a mature diameter of approximately 47 inches (120 cm) and a height of 39 inches (100 cm), with upright foliage and a fast growth rate. It is best suited to partial to dappled shade in typical hosta-growing zones, where its blue-green coloration and corrugated texture are most pronounced. Its substantial size makes it an effective specimen or background plant in shaded borders, and it pairs well with ferns or other shade-tolerant perennials that contrast with its bold leaf form.
Care Notes
Provide consistent moisture, especially during dry periods, and apply a balanced fertilizer in early spring as new growth emerges. The thick leaf substance offers moderate resistance to slugs, though standard preventive measures may still be warranted in damp conditions.
Size and leaf
| Clump height | 39.375 in (100 cm) |
|---|---|
| Clump width | 47.125 in (119.7 cm) |
| Leaf length | 18.5 in (47 cm) |
| Leaf width | 11.375 in (28.9 cm) |
| Vein pairs | 11 |
| Leaf | intensely blue-green heavily rippled margins; dull on top; dull underneath; lightly cupped, deeply wavy, lightly corrugated |
| Flower scape height | 51.25–55.125 in (130.2–140.0 cm) |
| Seasonal colour change | blue gets green during the growing season |
| Notable characteristics | blue leaf, thick leaf substance, white backs, a wavy margin and huge leaves |
From the American Hosta Society Registry record.
Parentage
- Pod parent: H. 'Empress Wu' — H. ‘Empress Wu’
Similar cultivars
Other registered hostas in the same AHS section class (I-2, giant size):
- H. ‘Midnight Dream’ (2015)
- H. ‘Kim’ (2016)
- H. ‘Blue Mammoth’ (2010)
- H. ‘Coal Miner’ (2010)
- H. ‘Groo Bloo’ (2010)
- H. ‘Mike’ (2010)
Related guides
Registration data: AHS Registry #5948