Alyogyne cuneiformis

Alyogyne cuneiformis, so named for its wedge-shaped leaves, is part of a group of Hibiscus-related plants native to the Australian coast. This species quickly forms an upright bush, recognisable by its leaves divided into 3 cuneiform segments, which widen from the base to the top. Its flowering is delicate, with corollas of almost white iridescent petals that partially open to reveal a dark red heart. The flowers are ephemeral and renew almost daily during the flowering period. Alyogyne cuneiformis is resistant to drought once established. Gardeners in cooler regions might grow this beautiful exotic plant in a pot on the terrace or balcony, to be stored away in winter.

Alyogyne cuneiformis, formerly named Cienfuegosia cuneiformis or Fugosia cuneiformis, belongs to the Malvaceae family, like shrub mallow and hibiscus. It is native to the western coasts of Australia, where the climate is very dry, hot, and windy in summer, mild, windy, and more temperate in winter. It grows in coastal areas, often in sandy soils. Quite adaptable, this species tolerates clay, limestone and sand, but requires a very well-draining soil where water does not stagnate, both in winter and summer. It can withstand short frosts of about -5°C (23 °F) if its soil is dry in winter. In moist soil, it will perish at -1°C (30.2 °F). Its growth is shrub-like and its foliage is evergreen.

In nature, Alyogyne cuneiformis can reach a height of 3m (10 ft). In Europe, its dimensions rarely exceed 1.50m (5 ft) in height and 1m (3 in 4 ft) in width, when planted in the ground. It has a very fast growth rate and an upright but flexible habit. Flowering occurs from April to June, from June to September, or from September to November depending on the region. Each flower, about 10-12cm (4-5 in) wide, is composed of 5 petals that are very pale mauve-pink when they open, overlapping and arranged in cups that never fully open. The centre of the corolla, dark red, is occupied by many short stamens with yellow anthers, surrounding 5 that are longer and partially fused. Like all plants in the Malvaceae family, the flowers only live for a day or two, but they renew continuously for nearly 4 months. The flowers, pollinated by insects, give way to fruits in 5-lobed capsules containing seeds. The foliage consists of thick, slightly rough leaves, divided into 3 dark green lobes. To maintain a compact shape, we recommend pruning in March, and lightly throughout the growing season. This Alyogyne is a short-lived plant, lasting around 8 years.

Alyogyne cuneiformis is a plant for dry soil that needs protection from frost. To preserve it, it is essential to plant it in a site sheltered from cold winds, on a somewhat arid slope, in a large rock garden or raised bed enriched with gravel, and to protect its base from water in winter. It can be combined with other frost-tolerant plants for dry soil such as hybrid lavenders, Westringia, rock roses, and blue agapanthus to create superb combinations. Growing it in a large pot presents no difficulties and allows for its protection during winter in a bright, unheated room.