H. ‘Cosmic Flash’
Hosta ‘Cosmic Flash’ is a registered cultivar () .
| Year registered | 2010 |
|---|---|
| Section class | III-7 (Medium) |
Overview
Registered in 2010 as a sport of Hosta 'Flash of Light', 'Cosmic Flash' is a medium-sized cultivar distinguished by its dark green leaves with greenish-yellow to creamy white streaked margins. The leaves are nearly round with cordate bases, moderately cupped and lightly folded, with slightly rippled margins and moderate corrugation.
In the Garden
'Cosmic Flash' forms a mound-like clump reaching 23 inches (58.4 cm) in height and 41 inches (104.1 cm) in diameter, with a moderate growth rate. It performs best in partial to full shade, typical for hostas, and its substantial leaf texture and variegation provide contrast when paired with finer-textured shade perennials such as ferns or Heuchera. The dark green scapes, reaching 38 to 40 inches (96.5 to 101.6 cm), bear flowers typical of the genus.
Care Notes
Water regularly to maintain consistent soil moisture, particularly during dry periods. Apply a balanced fertilizer in early spring as new growth emerges. Standard precautions against slugs and deer are advisable, 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 | 23 in (58.4 cm) |
|---|---|
| Clump width | 41 in (104.1 cm) |
| Leaf length | 8.5 in (21.6 cm) |
| Leaf width | 7.25 in (18.4 cm) |
| Vein pairs | 16 |
| Leaf | dark green, streaked with greenish yellow to creamy white slightly rippled margins; slightly shiny on top; slightly shiny underneath; moderately cupped, lightly folded, moderately corrugated |
| Flower scape height | 38–40 in (96.5–101.6 cm) |
| Notable characteristics | very interesting form and leaves |
From the American Hosta Society Registry record.
Parentage
- Sport parent: Sport of H. 'Flash of Light'
Similar cultivars
Other registered hostas in the same AHS section class (III-7, medium size):
- H. ‘Game Boy’ (2011)
- H. ‘So Nice’ (2015)
- H. ‘Seventh Heaven’ (1994)
- H. ‘Blueberry Swirl’ (2010)
- H. ‘Chimney Rock’ (2010)
- H. ‘Clown Belly’ (2010)
Related guides
Registration data: AHS Registry #1180. How we check this data.