H. ‘Cosmic River’
Hosta ‘Cosmic River’ is a registered cultivar () .
| Year registered | 2011 |
|---|---|
| Section class | IV-7 (Small) |
Overview
Registered in 2011, 'Cosmic River' is a small hosta cultivar derived from a cross between H. 'Misty May' (pod parent) and a H. 'Misty May' seedling (pollen parent). It is visually distinguished by its narrow, lance-shaped leaves with green centers, greenish-yellow and creamy white streaked margins, and a pronounced cupped, wavy form.
In the Garden
'Cosmic River' forms a compact, mound-like clump reaching 12 inches (30.5 cm) in height and 21 inches (53.3 cm) in diameter, with a moderate growth rate. It performs best in partial to full shade, typical of most hostas, and is well-suited for the front of borders, rock gardens, or container plantings due to its small stature. Its narrow, rippled leaves provide textural contrast when paired with broad-leaved perennials such as ferns or heucheras.
Care Notes
Water regularly to maintain even soil moisture, especially during dry periods. Apply a balanced, slow-release fertilizer in early spring as new growth emerges. Like most hostas, it is susceptible to slug and deer damage, so preventive measures may be necessary.
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 | 12 in (30.5 cm) |
|---|---|
| Clump width | 21 in (53.3 cm) |
| Leaf length | 7.25 in (18.4 cm) |
| Leaf width | 1.75 in (4.4 cm) |
| Vein pairs | 8 |
| Leaf | streaked with greenish yellow and creamy white slightly rippled margins; slightly shiny on top; dull underneath; cupped, wavy |
| Flower scape height | 24–32 in (61.0–81.3 cm) |
| Notable characteristics | narrow leaves with edge and cupping |
From the American Hosta Society Registry record.
Parentage
- Pod parent: H. 'Misty May'
- Pollen parent: H. 'Misty May' seedling
Similar cultivars
Other registered hostas in the same AHS section class (IV-7, small size):
- H. ‘Lodikito’ (2013)
- H. ‘Stars and Stripes’ (2000)
- H. ‘Coach Beets Dotson’ (2011)
- H. ‘Coach Jim Brainerd’ (2011)
- H. ‘Cosmic Little Elf’ (2011)
- H. ‘Don’t Touch My Junk’ (2011)
Related guides
Registration data: AHS Registry #1203. How we check this data.