Greening Ku-ring-gai's Rooftops

There is increasing public, industry and government interest in establishing green roofs in Australian cities due to their demonstrated social and environmental benefits. One of the main barriers to their establishment is the lack of scientific studies to determine what native species cope best under local conditions. This study evaluated the performance of five selected species in a simulated green roof environment in Ku-ring-gai, New South Wales under local conditions over an eight-month period to gauge their feasibility for use in commercial green roof projects.

The best performers were:

Blue flax lily (Dianella caerulea)
Climbing guinea flower (Hibbertia scandens)
Spiny mat rush (Lomandra longifolia)

An information sheet was produced for interested residents. You can download it here.