Evening Gown Coral Bells

Overview

• Botanical name: Heuchera ‘Evening Gown’ (also labelled Dressed Up® ‘Evening Gown’). 

• Common name: Evening Gown Coral Bells

• Habit: Mounded perennial with very dark, glossy black‑purple foliage, ruffled and large leaves, with upright flower scapes bearing pink‑buds opening to white blooms. 

• Mature size: Approximately 12‑14 inches tall (30‑36 cm) and 20‑24 inches wide (51‑61 cm). 

• Light & soil attributes: Can grow in sun or shade, thrives in humus‑rich, well‑drained soil. Salt tolerant. 

• Hardiness: Listed for Zones 4a‑9a in one source. 

Light & Site Requirements

• Best in part shade (i.e., morning sun + afternoon shade) for optimal foliage colour, especially in regions with strong sun. According to the manufacturer, “sun or shade” is acceptable. 

• In cooler climates (such as Zone 3), this cultivar may tolerate more sun so long as the soil remains well‑drained and moisture is adequate.

• Soil: Preferably humus‑rich and well‑drained to avoid crown/root issues. Avoid sites where water stands. 

Watering & Maintenance

• At planting: Keep soil evenly moist until the plant establishes.

• After establishment: Moderate watering; the foliage is evergreen/semievergreen and will benefit from consistent moisture but not soggy conditions. 

• Mulch lightly in early spring (especially in colder climates) to moderate soil temperature.

• Pruning/clean‑up: In early spring, trim back any tattered foliage to allow new growth. Remove spent flower stalks if desired. 

• Fertilizing: Apply a light top‑dress of compost or slow release fertilizer in spring; avoid heavy feeding which may encourage floppy growth. 

Cold‑Climate / Zone 3 Considerations

• Although explicitly rated to Zone 4a, in a favorable site—full sun or bright part shade, excellent drainage, sheltered from harsh drying winds—this cultivar can succeed in Zone 3.

• Ensure site does not have water pooling or heavy clay that remains saturated during snow melt—Heucheras are susceptible to crown rot or heaving in freeze/thaw cycles. 

• Because its foliage is the main feature, winter appearance matters: choose a site with some snow protection or wind buffer if possible.

• Early spring: inspect for crown lift/heaving; reseat plant and re‑mulch if necessary.

Photo from Proven Winners