I was just in Hobart Botanical Gardens over the new year. These pictures show how they were testing a native grass Microlaena'stipoides instead of traditional grasses.
Mircolaena'stipoides or Weeping Grass, is an Australian native perennial grass that is widely distributed throughout the damper zones of eastern Australia, from Cape York to Tasmania. It is relatively'drought tolerant and frost resistant.
If the trail is successful they may use it in other areas of the garden.