Boronia pinnata aka Pink Boronia

Boronia pinnata, or pinnate boronia, belongs to the rue family, Rutaceae. Kew places its native range in eastern New South Wales, Australia. It grows in mountain areas, heathland, and dry sclerophyll forests. These forests have plants with tough leaves. Kew classes its native climate as subtropical. It is not native to Britain or Ireland.

This evergreen shrub grows to about 6.6 feet (2 metres). Its woody frame keeps its leaves through the year. The supplied sources show plants with pink or white flowers. They give no clear flowering season or fruit details. Gardeners grow it for its flowers and scent. Growers can obtain flowers in the first year from seed. The Ferns links this to pot culture and repeated shoot-tip pinching. Both leaves and flowers yield an essential oil for perfume.

Give this shrub a sunny site with shelter from harsh weather. It needs rich, sandy soil that drains well. The soil should be mildly acid and free of lime. PFAF reports that it accepts dry or moist ground. It also states that the plant cannot grow in shade. A sunny woodland edge is among its listed garden sites. Sites beside south- or west-facing walls are also listed. These positions match its stated need for sun and shelter.

Cold tolerance depends on more than the lowest winter temperature. PFAF lists USDA zones 8–11 for this species. It reports survival at 19°F (−7°C) in Australian gardens. That result may not hold in British gardens. Britain has cooler summers and longer, wetter winters. Reports differ on how best to grow it there. Some suggest a wall in a mild area. Others call for a greenhouse or winter shelter indoors. Pots allow outdoor growth in summer and indoor shelter in winter.

Seed and cuttings provide two ways to raise new plants. Sow seed on the compost surface under glass and keep it moist. Reported germination takes four to nine weeks at 75°F (24°C). Keep young plants under glass for their first winter. Plant them out after the last expected spring frost. Half-ripe shoot tips or side shoots can also form cuttings. The sources record no food or medicinal uses. They list no known hazards, but this does not prove safety. The supplied evidence names no specific pests or diseases.