H. ‘Cosmic Rainbow’
Hosta ‘Cosmic Rainbow’ is a registered cultivar () .
| Year registered | 2008 |
|---|---|
| Section class | II-7 (Large) |
Overview
Registered in 2008, Hosta 'Cosmic Rainbow' is a large cultivar resulting from a cross between H. 'Cosmic Hippie' (pod parent) and H. 'Dorothy Benedict' (pollen parent). Its visual distinction lies in dark green leaves heavily streaked with yellow, framed by gold margins, with lightly rippled edges and a slightly shiny upper surface.
In the Garden
'Cosmic Rainbow' performs best in partial to full shade, reaching a mature spread of 38 inches (96.5 cm) and a height of 18 inches (45.7 cm). Its substantial leaf size—10 inches (25.4 cm) long by 8 inches (20.3 cm) wide—makes it a strong specimen or border plant, pairing well with ferns, astilbes, or other shade-tolerant perennials. The green-streaked scapes, 28 to 36 inches (71.1 to 91.4 cm) tall, bear lavender flowers in midsummer.
Care Notes
Provide consistent moisture, especially during dry periods, and apply a balanced fertilizer in early spring as new growth emerges. Like most hostas, it is susceptible to slug and deer damage; monitor and manage accordingly in typical hosta-growing zones.
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 | 18 in (45.7 cm) |
|---|---|
| Clump width | 38 in (96.5 cm) |
| Leaf length | 10 in (25.4 cm) |
| Leaf width | 8 in (20.3 cm) |
| Vein pairs | 17 |
| Leaf | Dark green streaked with yellow slightly rippled margins; slightly shiny on top; dull underneath; lightly corrugated |
| Flower scape height | 28–36 in (71.1–91.4 cm) |
From the American Hosta Society Registry record.
Parentage
- Pod parent: H. 'Cosmic Hippie' — H. ‘Cosmic Hippie’
- Pollen parent: H. 'Dorothy Benedict' — H. ‘Dorothy Benedict’
Similar cultivars
Other registered hostas in the same AHS section class (II-7, large size):
- H. ‘Cosmic Sister’ (2006)
- H. ‘Quesadilla’ (2010)
- H. ‘Justice’ (2003)
- H. ‘Breeder's Love’ (2008)
- H. ‘Chocolate Ripple’ (2008)
- H. ‘Colorful Sister’ (2008)
Related guides
Registration data: AHS Registry #1201. How we check this data.