Heuchera ‘Obsidian’
Overview
Uses: Containers, shaded borders, woodland gardens, and modern landscape accents.
Benefits: Glossy, near-black foliage maintains its deep color throughout the growing season. Compact habit, strong leaf retention, and adaptable performance make it a reliable contrast plant in mixed plantings.
USDA Hardiness Zones: 4–9
Sun: Full Sun to Partial Shade
Life Cycle: Hardy Perennial
Growth Habit: Mounding, Clumping — dense basal rosette forming a rounded mound.
Foliage Color: Deep Purple to Black
Mature Height: 10–12 inches
Mature Width: 14–18 inches
Bloom Season: Late Spring to Summer
Growth Rate: Moderate
Summary
Rich and dramatic, ‘Obsidian’ is valued for its glossy, near-black foliage that anchors shaded gardens with bold contrast. Its dense, symmetrical mound offers structure and depth throughout the growing season.
Unlike many dark-leaved varieties, ‘Obsidian’ holds its color well in both sun and partial shade. Airy cream flowers rise above the foliage in early summer, adding seasonal softness while maintaining the plant’s strong architectural presence.
Care
Heuchera ‘Obsidian’ Care
Plant in well-drained soil enriched with organic matter. Water regularly during establishment, keeping soil evenly moist but not saturated. Once mature, plants tolerate short dry periods but perform best with consistent moisture during extended heat.
Full sun is suitable in cooler northern regions, while partial shade is preferred in warmer climates to protect foliage. Remove older leaves in early spring to refresh the plant and encourage clean new growth.
Apply a balanced slow release fertilizer in spring to support healthy foliage development.
When grown in containers, use a high-quality potting mix and ensure proper drainage. Container-grown plants may require more frequent watering. Plants hardy in the ground may require winter protection when grown in containers in colder zones.
Size
What Size is the Heuchera ‘Obsidian’ for Sale Online?
Plants are shipped in grower containers and are actively growing at the time of shipment. For current pot size and stage of growth, please contact us.
How Large Does Heuchera ‘Obsidian’ Grow?
Mature plants typically reach 10–12 inches tall and 14–18 inches wide, forming a dense, rounded mound that spreads gradually over time.
Additional Information
What are some common names for this plant?
Heuchera is commonly known as coral bells.
Is ‘Obsidian’ evergreen?
In milder climates, foliage often remains semi-evergreen through winter. In colder regions, leaves may die back before new growth emerges in spring.
Does it attract pollinators?
Yes. The delicate summer flowers attract hummingbirds and other beneficial insects.
Is it deer resistant?
Heuchera is generally considered deer-resistant, though no plant is completely immune to browsing. Explore additional browse-tolerant options in our Deer-Resistant Perennials and Grasses collection.
Where does ‘Obsidian’ work best in the landscape?
Its dark foliage makes it especially effective in shaded borders, woodland gardens, and mixed container plantings. You can explore more shade-friendly options in our Perennials collection.
