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heuchera obsidian flower

Heuchera Obsidian flower is a striking perennial, beloved by New Zealand gardeners for its velvety, almost-black foliage and delicate sprays of tiny cream flowers. Often called “Coral Bells,” this cultivar of Heuchera brings rich, dramatic colour contrast to garden beds, shady borders, and containers. The deeply lobed leaves act as a living backdrop, making the airy heuchera obsidian flower stems truly stand out throughout late spring and early summer. Not only does Heuchera Obsidian offer outstanding aesthetics, but it is also low-maintenance and ideal for our local climate, thriving in both full shade and dappled sunlight.

Heuchera Obsidian (Coral Bells)

5 from 1 customers

Coral Bells, Alumroot

Heuchera Obsidian is an herbaceous perennial grown for its lush, dark purple-near black foliage. Flower spikes emerge above the foliage in summer carrying tiny, bell-shaped, cream-white flowers. It typically grows to 40 cm tall and the same wide, performing best when planted on a well-drained, sheltered site. Heuchera Obsidian is commonly used for adding colour, used to provide a colour contrast, included in borders or mixed plantings, added to cottage and tropical gardens, or planted around outdoor living areas.

heuchera-obsidian--3
  • Suited to regions:
    Subtropical, Temperate
  • Plant type:
    Perennials
  • Height:
    40 cm
  • Spread:
    40 cm
  • Flowering time:
    Summer
  • Garden uses:
    Borders, Containers, Living areas, Paths & Steps, Pool areas
  • Garden styles:
    Backyard, City & Courtyard, Frontyard, Japanese, Mediterranean, Modern, Tropical
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Heuchera Obsidian (Coral Bells)

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Features and Growing Conditions

Heuchera Obsidian flower is celebrated for its tidy mounding habit and evergreen presence in milder New Zealand gardens. Expect mature plants to reach about 30cm tall, with flowering stems extending above the foliage. This hardy perennial tolerates a range of soils, provided they drain well, and once established, it is relatively drought resistant. To achieve the richest leaf colour, plant Heuchera Obsidian in partial shade, and apply mulch in summer to retain moisture.

Garden Uses for Heuchera Obsidian

The unique dark leaves of Heuchera Obsidian flower make it ideal for pairing with lighter foliage or pastel blooms. Use it as an accent in perennial borders, massed under trees, or to edge shaded pathways. Its low-growing form provides a perfect foil for brighter companions such as Alstroemeria Inca Flamingo (Peruvian Lily) and Erigeron glaucus. Try positioning it near blue-flowered perennials like Gentiana 'Marsha' or spiky textures such as Liatris spicata Floristan Violet (Blazing Star) for vibrant contrast.

Companion Coral Bells and Alternatives

If you’re inspired by the dramatic effect of Heuchera Obsidian flower, consider expanding your garden display with other stunning coral bells. Heuchera Peppermint Spice (Coral Bells) adds silvery hues and pink-tinged foliage, while Heuchera Kassandra (Coral Bells) brings caramel tones and striking colour shifts throughout the seasons. For lovers of rich, dark foliage, Heuchera Northern Exposure Black (Coral Bells) and Heuchera Dark Secret (Coral Bells) offer further options. Lighter accents are also achievable with Heuchera Northern Exposure Silver (Coral Bells), or add bold textural contrast using Hosta Little Sunspot.

Seasonal Care Tips

Heuchera Obsidian flower requires little maintenance, but you can keep plants looking their best by removing spent flower spikes and replacing mulch annually. In cooler regions, protect crowns from winter wet with a layer of leaf mould or pine needles. Every three to four years, lift and divide clumps in autumn to promote vigorous, youthful growth. With these simple steps, your Heuchera Obsidian will reward you with years of reliable colour and delicate blooms.


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