The Wellington Mint-bush Prostanthera galbraithiae is an erect, spreading sub-shrub, growing to two metres high. It often grows through, and supported by, other vegetation (Walsh & Entwisle, 1994). Flowers are deep mauve-purple with maroon dots at the base of the lobes (Conn, 1998). Flowering occurs in spring.
The Wellington Mint-bush appears to be strongly fire-dependent for germination, and appears to decline in vigour after approximately 10 years. Appropriate fire interval is expected to be about 15 years.
The Wellington Mint-bush is listed as vulnerable under the Environment Protection and Biodiversity Conservation Act (EPBC) 1999.