Hosta 'Sum and Substance': Giant Gold Standard of the Hosta World

Hosta 'Sum and Substance': The King of Large Hostas

Hosta 'Sum and Substance' (also known as 'Sum & Substance') is widely regarded as one of the greatest hosta introductions of all time. This giant cultivar, hybridized by Aden and introduced in 1980, redefined the genus with its massive size, brilliant chartreuse-gold foliage, and remarkable sun tolerance. It has received the Royal Horticultural Society's Award of Garden Merit and was named the American Hosta Growers Association "Hosta of the Year" in 2004.

Monumental Presence

'Sum and Substance' forms an immense, arching mound 3–4 feet tall and 5–6 feet wide at maturity. The leaves are enormous—15–20 inches long, 12–15 inches wide—thick, glossy, and deeply corrugated. They emerge chartreuse in spring, maturing to brilliant gold with more sun exposure. The substance (leaf thickness) is exceptional, conferring slug resistance and durability.

In midsummer, pale lavender flowers appear on 3–4 foot scapes, but the foliage is the main attraction.

Sun-Tolerant Giant

Unlike most hostas, 'Sum and Substance' thrives in partial to nearly full sun (with adequate moisture), where its color develops maximum gold intensity. In shade, it remains chartreuse. It prefers rich, moist, well-drained soil but tolerates a range of conditions. Hardy in USDA zones 3–9. The thick leaves resist slug and snail damage better than thin-leaved cultivars.

Taxonomic Profile

• Family: Liliaceae (formerly Asparagaceae, subfamily Agavoideae)
• Genus: Hosta
• Cultivar: 'Sum and Substance' (syn. 'Sum & Substance')
• Hybridizer: Aden
• Introduced: 1980

Landscape Anchor

'Sum and Substance' is a specimen plant that anchors a shade garden. Use as a focal point, in mass plantings for dramatic effect, or combined with fine-textured ferns and dark-leaved companions for contrast. Its sun tolerance expands design possibilities. A true icon of the hosta world—every serious shade gardener should grow it.