Heuchera, often known as Coral Bells, are cherished perennials that bring vibrant color and texture to garden spaces. Among many cultivars, ‘Twisted Sister’ stands out as a unique choice, prized for its distinctive foliage. This plant transforms shady garden areas with its dynamic hues and appealing leaf structure. Its striking appearance and low maintenance needs contribute to its broad appeal.
Understanding ‘Twisted Sister’
The ‘Twisted Sister’ cultivar is admired for its striking leaves rather than its delicate, bell-shaped flowers. Its foliage displays a captivating blend of colors, often shifting through chartreuse, gold, orange, and reddish tones depending on light exposure and season. A defining characteristic is the ruffled or “twisted” texture of its leaves, which adds visual interest. This compact plant forms a mounding habit, reaching heights of 8 to 12 inches and spreading 12 to 24 inches wide.
Essential Care for ‘Twisted Sister’
Optimal light for this plant is partial shade, meaning it benefits from about four to six hours of direct sunlight, ideally morning sun, while being protected from intense afternoon rays. Lighter-colored varieties need more shade to prevent leaf scorch, whereas those with darker foliage can tolerate slightly more sun exposure.
The soil requires a well-draining, humus-rich medium that remains consistently moist but never waterlogged. Heuchera performs best in soil with a slightly acidic to neutral pH, ranging from 5.5 to 7.0. Amending heavy clay soils with organic matter like compost or aged manure greatly improves drainage and provides necessary nutrients.
Consistent watering is important, especially for newly planted Heuchera or during dry periods, with about one inch of water per week being sufficient. Water deeply at the base of the plant in the morning to allow the foliage to dry, which helps prevent fungal issues. While ‘Twisted Sister’ can tolerate some drought once established, consistent moisture promotes more lush foliage.
‘Twisted Sister’ is a hardy perennial, thriving in USDA zones 4 through 9. In colder regions, some varieties may become deciduous, losing their leaves in winter, but will re-sprout in spring. Fertilization requirements are minimal; ‘Twisted Sister’ is a light feeder and benefits from an annual application of a half-inch layer of aged compost around its base in spring. Alternatively, a light dose of a slow-release or mild organic fertilizer can be applied, but excessive fertilization can lead to abundant foliage with fewer flowers.
Planting and Garden Uses
The best times for planting are spring or fall when the soil is moist and temperatures are moderate. When preparing the planting site, dig a hole that is at least twice as wide as the plant’s root ball, ensuring it is no deeper than the root ball itself. Plant the Heuchera at the same level it was in its nursery container, or even slightly higher, to prevent crown rot. For multiple plants, spacing them 12 to 24 inches apart allows for adequate air circulation and mature growth.
‘Twisted Sister’ Heuchera offers versatility in garden design due to its compact size and vibrant foliage. It excels when used in borders, providing a striking front-row presence due to its unique leaf texture and color. The plant is also well-suited for containers, adding a splash of color to patios or balconies, and can be used effectively in mass plantings as groundcover or to brighten woodland gardens. It is an excellent choice for adding textural and color contrast to mixed perennial beds.
Common Issues and Solutions
One frequent issue is root rot, which results from overwatering or poorly draining soil, especially during the colder, wetter months. Ensuring excellent soil drainage and avoiding soggy conditions can prevent this.
Foliage problems sometimes arise, such as leaf scorch, which manifests as browning or crisping edges, due to excessive direct sun exposure, particularly for lighter-colored leaves. Conversely, if the foliage color appears dull or faded, it might indicate insufficient light. Adjusting the plant’s location to provide more appropriate light conditions can resolve these issues.
Heuchera can be susceptible to certain pests and diseases. Vine weevil larvae are a concern, as they feed on the plant’s roots, leading to wilting and decline, while adult weevils may chew notches in leaves. Slugs and snails can also cause ragged holes in the leaves. Fungal diseases like powdery mildew, appearing as white patches, and rust, characterized by orange-brown pustules on leaf undersides, can also affect Heuchera. Good air circulation, avoiding overhead watering, and prompt removal of affected foliage can help manage these problems.
‘Twisted Sister’ can become leggy over several years, a natural aging process addressed by dividing the plant to rejuvenate it. In regions with fluctuating winter temperatures, frost heaving, where plants are pushed out of the soil, can be mitigated by applying a layer of mulch in autumn.