Botanical Name: Heuchera ‘Fire Alarm’ Common Name: Coral Bells Hardiness Zone: Perennial in Most Climates (USDA Zones 4–9) Size: 10–14" Tall × 16–20" Spread Growth Habit: Dense, 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: Brilliant Red Foliage, Strong Color Retention, Evergreen to Semi-Evergreen, Pollinator Friendly Uses: Shade Gardens, Borders, Containers, Woodland Gardens, Bold Foliage Contrast

Patent: ✔ Patented Propagation: ❌ Propagation Prohibited Without License

More About Heuchera ‘Fire Alarm’

Heuchera ‘Fire Alarm’ is prized for its intense, fire-engine red foliage that delivers standout color from early spring through fall. The broad, slightly ruffled leaves emerge bright red and hold their color remarkably well through summer heat, often intensifying again as temperatures cool.

In late spring, slender flower stalks rise above the foliage bearing small, light-colored blooms that add a subtle accent without detracting from the foliage display. Even when not in bloom, the plant provides strong visual impact year-round.

Why We Like It (Our Trials)

In our trials, ‘Fire Alarm’ has shown excellent vigor and color stability, even in warm, humid conditions. It forms a full, uniform mound and maintains clean foliage with minimal maintenance.

We especially appreciate how dramatic this variety is in design. The vivid red foliage creates instant contrast against greens, silvers, and dark purples, making it a natural focal point in shade gardens and containers alike.

Heuchera ‘Fire Alarm’ vs. Other Heuchera

Compared to darker varieties like ‘Black Forest Cake,’ ‘Fire Alarm’ offers bright, high-energy color rather than depth and shadow, making it ideal when bold contrast is desired.

When compared to pink or berry-toned varieties like ‘Berry Smoothie,’ ‘Fire Alarm’ provides a clear, true red tone that reads strongly from a distance. For gardeners seeking a reliable, eye-catching heuchera with blazing red foliage and strong garden performance, Heuchera ‘Fire Alarm’ is an outstanding choice.