Low-growing flowering plant in the daisy family, endemic to New Zealand. Occurs naturally in exposed, rocky areas along the coast and on inland mountains in Marlborough and Northern Canterbury. Leathery, dark green leaves, 7-17 cm long, covered with tiny white hairs. Daisy-like white flowers to 7.5 cm across, with yellow centers emerge in spring from grey-white buds held above the foliage like felted drumsticks. The flowers are followed by fluffy, pale brown seed heads.
Synonyms: Olearia insignis, Olearia marginata. Of the three species in the genus Pachystegia, P. insignis is the most common, both in cultivation and in nature. Pachystegia rufa is similar to P. insignis, but has brownish felt on the flower buds, leaf-undersides, and the flower stems. Pachystegia minor is also very similar to the Marlborough rock daisy, but has smaller leaves without the white leaf margins.
Prefers a sunny position in very well-draining soil. Can handle part shade, but will have a more open habit. Drought-tolerant. No maintenance required, other than pruning back if and when required. Usually trouble-free as long as the soil is sufficiently dry. Tolerates moderate frosts and is hardy throughout New Zealand.
Excellent choice for exposed, coastal sites. Looks attractive all year round with its grey-green foliage, silvery-grey flower buds and flower stems, the daisy-like flowers and fluffy seed-heads. Combine for example with grasses, succulents or ground covers such as Acaena inermis 'Purpurea' (as in the photographs).