This shrub has upright wiry stems that are normally covered in fine hair and forms a open to compact rounded habit. It has tiny dark green heart-shaped leaves and the mauve tube-shaped 2-lipped flowers appear during spring.

Hardiness zones 9 to 10 

Prostanthera rhombea is naturally found in Australia on the east coast from Queensland to Victoria, but primarily in the Sydney basin in New South Wales. It prefers well drained moderately fertile sandy soils in an open sunny position and tolerates light frost but is drought tender.

Sparkling Mintbush is grown for its flowers and is planted in shrub borders or as a specimen in a small garden. It is also suitable as a container plant and tolerates coastal positions. It establishes in 2 to 3 years but may be short lived and is planted in bushland settings. ID 1976

Prostanthera (pros-TAN-ther-ah) rhombea (rom-BE-ah)

Lamiaceae (lay-mee-AY-see-ee) 
(Labiatae)
Mint Family