Olearia macrodonta aka New Zealand Holly

Olearia macrodonta is an evergreen shrub or small tree from New Zealand. Its common names include daisy bush and New Zealand holly. It belongs to the daisy family, Asteraceae. In the wild, it grows on both main islands. Its range runs south from about latitude 37°30′ south. It grows in lowland forests and reaches subalpine sites. These habitats extend to about 4,265 feet [1,300 m] above sea level.

This plant grows upright and keeps its leaves all year. The RHS gives a garden height and spread of 8–13 feet [2.5–4 m]. It takes about 10–20 years to reach full size. Larger plants can reach 20 feet [6 m] tall. Oregon State reports widths up to 15 feet [4.6 m]. The oval leaves have sharp teeth and pointed tips. They grow one per node, alternating along the stems. Sources describe their upper sides as grey-green or glossy dark green. Dense white or silvery hairs cover the leaf undersides. Leaves reach about 3.5–4 inches [9–10 cm] long.

Small, scented flower heads open in large groups during summer. White rays surround reddish-brown centres. Each head measures about half an inch [1.5 cm] across. The whole cluster can span 6 inches [15 cm]. The flowers stand out against the evergreen leaves. Both the scent and leaf form add interest to garden plantings.

The RHS recommends full sun and soil that drains well. Oregon State also reports strong tolerance of shade. The plant accepts chalk, clay, loam, and sandy soils. It grows in acid, neutral, or alkaline ground. It tolerates drought and can grow in exposed sites. The RHS rates it H4 for UK hardiness. Plants For A Future lists USDA zones 7–10. Oregon State gives the narrower rating of zone 9, with zone 8 in parentheses.

Salt-laden coastal winds suit this plant better than many shrubs. It can form a windbreak hedge or a leafy screen. Gardens can also use it beside walls or as a bold specimen. Sources disagree about how well it handles severe pruning. Semi-hardwood cuttings provide a way to raise more plants. Pests and diseases cause few reported problems, though honey fungus can occur. Plants For A Future lists no known edible or medicinal uses. It also reports no known hazards, but that does not establish food safety.