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.
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 | 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. ‘Empress Wu’ (2008)
- H. ‘Armani’ (2015)
- H. ‘Green Dragonet’ (1999)
- H. ‘King James’ (1992)
- H. ‘Niagara Falls’ (1991)
- H. ‘Belle Vernon Beauty’ (2011)
Related guides
Registration data: AHS Registry #5472. How we check this data.