Slender Westringia

Slender Westringia (Westringia eremicola) is an evergreen woody shrub belonging to the family Lamiaceae. Often called the native rosemary due to its superficial resemblance to the herb, it is widely valued in horticulture for its resilience and graceful appearance in landscape architecture.

The species is native to Australia, predominantly found in the eastern states including New South Wales and Victoria. It typically inhabits rocky outcrops, sclerophyll forests, and well-drained slopes, demonstrating a remarkable ability to thrive in poor, nutrient-deficient soils typical of its native environment.

Botanically, it is characterized by narrow, aromatic leaves arranged in whorls along the stems. The flowers are small, typically appearing in shades of white, mauve, or pale blue, and provide a prolonged blooming period. The plant maintains a naturally rounded or upright habit, depending on the specific environmental conditions and exposure to sunlight.

In terms of cultivation, it requires full sun and exceptionally well-draining soil to prevent root rot, which is its primary vulnerability. It is highly drought-tolerant once established and does not require frequent fertilization. Pruning is recommended after the main flowering flush to maintain a dense, compact shape and promote vigorous new growth in the following season.

While relatively pest-free, the plant can be susceptible to scale insects and spider mites, particularly if placed in stagnant or overly humid conditions. Providing adequate airflow and avoiding overhead irrigation are the best preventative measures against fungal pathogens like root or collar rot, which can occur if the soil remains waterlogged for extended periods.