Heuchera ‘Obsidian’ is a popular perennial grown for its lustrous, jet‑black foliage that holds its deep colour throughout the season. The glossy leaves form a neat, mounded clump that adds dramatic contrast in shade and part‑shade plantings. In late spring to summer, slender stems rise above the foliage with sprays of small, bell‑shaped flowers that attract bees and butterflies, though most gardeners select this variety for its striking foliage colour rather than its blooms.
- Size: Height: ~20–30 cm (8–12 in) foliage height; flower stalks up to ~40–50 cm (16–20 in). Spread: ~30–45 cm (12–18 in)
- Growth habit: Compact, clump‑forming perennial
- Light: Part shade to full shade; tolerates more sun in cooler climates but best colour and leaf longevity in protected light shade
- Soil: Rich, humus‑rich, consistently moist but well‑drained soil
- Water: Regular water; keep evenly moist especially during establishment and dry spells
- Hardiness: USDA Zones 4–9 — suitable for Regina’s climate
- Maintenance: Remove older, damaged foliage in early spring; deadhead flower stalks if desired; divide clumps every 3–4 years to maintain vigour
- Uses: Shade borders, containers, edging, mixed perennial beds