If you want a 'no care' garden consider some of the species roses which are grown for perfumed flowers or for their ferny,coloured or fragrant foliage, and in some species the hips are the major feature. They can be used as hedges, ground covers, climbers or specimens. There are Species roses that will suit every climate within Australia from cold and wet to extremely hot and dry.
Species roses tolerate poor soils and the only maintenance they need is cutting out any dead wood annually when they are dormant.