H. ‘Sum Zero’
Hosta ‘Sum Zero’ is a registered cultivar () .
| Year registered | 2011 |
|---|---|
| Section class | I-1 (Giant) |
Overview
A sport of *Hosta* 'Final Summation' registered in 2011, 'Sum Zero' is a giant cultivar distinguished by its upright, deeply cupped foliage of intense blue-green. The leaves are nearly rounded with cordate bases, bearing a glaucous bloom on both surfaces and dark green, slightly rippled margins.
In the Garden
With a mature spread of 38 inches (96.5 cm) and height of 24 inches (61.0 cm), 'Sum Zero' forms a substantial, upright clump suited to partial to full shade in typical hosta-growing zones. Its large, cupped leaves and light corrugation provide textural contrast when paired with fine-textured ferns or broad-leaved companions such as *Heuchera* or *Astilbe*. The green scapes, reaching 30 to 36 inches (76.2 to 91.4 cm), carry pale lavender flowers in midsummer.
Care Notes
Provide consistent moisture, particularly during dry periods, and apply a balanced fertilizer in early spring as growth emerges. Like most large-leaved hostas, 'Sum Zero' is susceptible to slug and deer damage; monitor and manage accordingly.
Size and leaf
| Clump height | 24 in (61 cm) |
|---|---|
| Clump width | 38 in (96.5 cm) |
| Leaf length | 12 in (30.5 cm) |
| Leaf width | 10 in (25.4 cm) |
| Vein pairs | 12 |
| Leaf | dark green slightly rippled margins; glaucous bloom on top; glaucous bloom underneath; deeply cupped, lightly wavy, lightly corrugated |
| Flower scape height | 30–36 in (76.2–91.4 cm) |
| Notable characteristics | dark green upright and cupped sport of H. 'Final Summation' |
From the American Hosta Society Registry record.
Parentage
- Sport parent: Sport of H. 'Final Summation' — H. ‘Final Summation’
Similar cultivars
Other registered hostas in the same AHS section class (I-1, giant size):
- H. ‘Humpback Whale’ (2012)
- H. ‘Charles’ (2014)
- H. ‘Empress Wu’ (2008)
- H. ‘Armani’ (2015)
- H. ‘Komodo Dragon’ (2004)
- H. ‘Elata’ (2002)
Related guides
Registration data: AHS Registry #5472