Diosma hirsuta, commonly known as Bitter Buchu or Wilde Als, is an evergreen shrub native to the fynbos biome of South Africa, particularly thriving on rocky slopes and flats within this unique Mediterranean-type ecosystem. It typically grows at a moderate rate to a height of 1.75-3.25 feet (0.5-1 meter) and a width of 1.75-5 feet (0.5-1.5 meters). The plant features small, aromatic, needle-like leaves and bears clusters of star-shaped white flowers that bloom in the spring, adding a delicate touch to the garden. The flowers are modest in size but can be quite showy when the shrub is covered in blooms.

Bitter Buchu is valued for its fragrant foliage and drought tolerance once established, making it a suitable choice for water-wise gardens. It is often used in rock gardens, as a border plant, or in scented gardens for its aromatic leaves. This shrub prefers full sun exposure and well-drained sandy or loamy soils. It is relatively low-maintenance, requiring only moderate watering and occasional pruning to maintain its shape. While generally pest-free, it can be susceptible to root rot if overwatered or planted in poorly drained soils.CC BY-SA 4.0