Umbellularia californica

Native to parts of South-western North America, Umbellularia californica is an evergreen shrub with long narrow, bright green, aromatic leaves. Numerous clusters of pretty yellowish-green flowers appear on the branches in late spring, followed by dark purple fruit later in the year on mature plants.

• Position: Warm in full sun or partial shade.
• Soil: Moist or well drained, fertile soil.
• Hardiness: Reasonably hardy. Umbellularia californica requires shelter from cold winter winds.
• Flowering Period: April - May
• Flower Colour: Yellowish-green
• Rate of Growth: Moderate.
• Habit: Eventually a small tree with a dense, branching crown in the U.K.
  • Height: up to 10 m (32 ft).
  • Spread: 8 m (26 ft).

• Notes: Umbellularia californica is also known as the 'headache tree', which is a reference to the effects of prolonged exposure to the aromatic vapours released when twigs or leaves are crushed.