The “Aurora Borealis flower” captivates with its striking appearance, reminiscent of the northern lights. This plant adds dynamic color to gardens. Its distinctive foliage is a popular choice for visual interest.
Identifying the Aurora Borealis Flower
The plant commonly referred to as the “Aurora Borealis flower” is a cultivar of Heuchera, or Coral Bells. Heuchera ‘Aurora Borealis’ is the most recognized for this description. This perennial is known for its colorful, variegated foliage.
Leaves of Heuchera ‘Aurora Borealis’ display colors like green, purple, silver, and pink, often with veining or mottling. Hues shift and intensify with light and temperature, mimicking the northern lights. Leaves are rounded, lobed, or heart-shaped, and can be smooth, wavy, or ruffled, adding textural interest. While Heuchera produces small flowers on tall stems, these are secondary to foliage. Blooms emerge in late spring to early summer and attract pollinators.
Optimal Growing Conditions
For Heuchera ‘Aurora Borealis’ to thrive and display colors, environmental conditions are important. Most Heuchera cultivars prefer partial to dappled shade (four to six hours of direct morning sun). Protect from intense afternoon sun, which can scorch lighter leaves. Darker varieties tolerate more sun and may show enhanced color.
Soil composition impacts Heuchera health. Plants prefer well-draining soil rich in organic matter, with a slightly acidic to neutral pH (5.5 to 7.0). Amend heavy clay soils with compost to improve drainage and aeration, as Heuchera does not tolerate waterlogged conditions, especially in winter. Consistent moisture is preferred, but avoid overwatering to prevent root rot. Established plants tolerate some drought, but regular watering ensures healthier foliage.
Planting and Ongoing Care
Plant Heuchera ‘Aurora Borealis’ in spring or early fall, allowing establishment before extreme temperatures. Dig a hole the same depth as the root ball, ensuring the crown remains at or slightly above soil level to prevent rotting. Space plants 12 to 18 inches apart for air circulation and growth. After placing, backfill with soil and water thoroughly to settle roots.
Heuchera are light feeders and do not require extensive fertilization. An annual application of compost or a balanced, slow-release granular fertilizer in spring is sufficient for nutrients. Over-fertilization can lead to excessive foliage growth at the expense of coloration or flower production. Deadheading spent flower stalks encourages more blooms and maintains a tidy appearance. In colder climates (USDA Zones 4-9), Heuchera foliage is evergreen or semi-evergreen; apply organic mulch in fall to protect against ‘frost heaving’ and avoid cutting back foliage in winter, as existing leaves provide insulation.
Troubleshooting Common Issues
Heuchera ‘Aurora Borealis’ can encounter common issues. Leaf scorch (browning or crisping edges) indicates too much direct sun, especially intense afternoon sun. Move the plant to a shadier location or provide afternoon shade. Root rot is a concern from overly wet or poorly draining soil. Signs include wilting and a mushy crown; improve soil drainage and adjust watering frequency.
Pests affecting Heuchera include black vine weevils, slugs, and snails. Adult vine weevils cause irregular notches on leaf edges; their grubs feed on roots, leading to wilting and plant collapse. Slugs and snails create ragged holes and leave silvery trails; regular inspection and physical removal help manage these pests. Fungal diseases like powdery mildew, leaf spots, and Heuchera rust can occur. Powdery mildew is a white coating on leaves; rust manifests as brown spots and orange pustules; ensure good air circulation, avoid overhead watering, and promptly remove affected leaves to prevent and manage diseases.