Cassinia retorta

Cassinia retorta, commonly known as coastal cottonwood or simply cassinia, is a hardy evergreen shrub belonging to the Asteraceae family. This species is highly regarded for its distinctive, dense, and tangled growth habit, which allows it to thrive in challenging environments where other ornamental plants might struggle.

Originating from New Zealand, this plant is naturally adapted to coastal dunes and rocky headlands. Its evolutionary history has endowed it with remarkable resilience to salt-laden winds and maritime climates, making it an excellent candidate for stabilizing soil in coastal gardens and exposed landscapes.

Botanically, the plant is characterized by its small, tightly packed leaves covered in fine, greyish-white hairs, which provide a shimmering appearance under sunlight. During the flowering phase, it produces clusters of small, white or creamy flowers that add a delicate texture to the shrub's overall appearance during the summer months.

Regarding agrotechnical requirements, Cassinia retorta demands excellent soil drainage. It performs best in poor, sandy, or rocky soils and requires full sun exposure to maintain its compact, healthy form. Once established, it is remarkably drought-tolerant and requires minimal intervention or irrigation to flourish throughout the year.

In terms of maintenance and health, the primary management task involves strategic pruning to prevent the center of the bush from becoming too woody or sparse. While the plant is generally robust, growers should monitor for root rot if the soil remains waterlogged. Common pests are rarely a significant issue if the plant is situated in an environment with good air circulation.