Photo credit: Michael Lemmon
Prostanthera phylicifolia
The Mediterranean House at the Rawlings Conservatory and Botanic Gardens is beginning its annual display of spectacular and fragrant blooms.
One of the true gems is the Prostanthera phylicifolia or the Spiked Mint-bush, a large evergreen shrub that is now bursting with small purple flowers.
Native to Australia, this member of the Lamiaceae family grows to a height of 5 to 6 feet with a 3 to 4 foot spread. The narrow dark green foliage resembles rosemary and has a strong mint aroma.
According to the Australian aborigines, the leaves can be used as a remedy for headaches and colds. The plant does well in full sun to part shade and likes a well-drained soil. Best in USDA zones 9-10.