Botanical Name: Heuchera ‘Obsidian’ Common Name: Coral Bells Hardiness Zone: Perennial in Most Climates (USDA Zones 4–9) Size: 8–12" Tall × 14–18" Spread Growth Habit: Dense, Low-Mounding, Well-Branched Habit Sunlight: Partial Shade to Full Sun (Best Color in Morning Sun / Afternoon Shade) Soil: Well-Drained, Organic-Rich Soil Water Needs: Moderate; Consistent Moisture Preferred Bloom Season: Late Spring to Early Summer Fertilizer: Light Feeding in Spring Features: Jet-Black Foliage, Matte Finish, Excellent Color Stability, Evergreen to Semi-Evergreen Uses: Shade Gardens, Borders, Containers, Woodland Gardens, Dramatic Foliage Contrast

Patent: ✔ Patented Propagation: ❌ Propagation Prohibited Without License

More About Heuchera ‘Obsidian’

Heuchera ‘Obsidian’ is considered the gold standard for black-leaved coral bells, featuring truly jet-black foliage with a smooth, matte finish. Unlike many dark varieties that fade to burgundy or bronze, ‘Obsidian’ maintains its deep black color throughout the growing season.

In late spring, slender flower stalks rise above the foliage carrying small, creamy-white blooms that provide gentle contrast without distracting from the foliage. The plant’s low, compact habit keeps it looking intentional and refined year-round.

Why We Like It (Our Trials)

In our trials, ‘Obsidian’ has shown outstanding color retention, even in summer heat and humidity. It forms a tight, uniform mound and holds up well in both containers and in-ground plantings.

We especially appreciate its role as a design anchor. The black foliage makes surrounding plants look brighter and more vibrant, whether paired with silvers, chartreuse, whites, or bold flowering perennials. It’s one of the most reliable dark-foliage plants we grow.

Heuchera ‘Obsidian’ vs. Other Heuchera

Compared to varieties like ‘Black Forest Cake,’ ‘Obsidian’ offers a flatter, matte black finish rather than a glossy surface, giving it a more classic, understated look.

When compared to colorful heucheras such as ‘Fire Alarm’ or ‘Berry Smoothie,’ ‘Obsidian’ serves as a neutral foundation plant, grounding bold colors and adding depth to mixed plantings. For gardeners seeking a true black heuchera with proven performance and year-round impact, Heuchera ‘Obsidian’ remains unmatched.