Batger Quarry is a disused scoria quarry site on the western side of Maungawhau. Since the 1990s volunteers have worked intensively to replace invasive exotic plants with a cover of native vegetation which, over time, will help stabilise the slope and be largely self-sustaining.
All major weeds are now down to remnant levels. There has been some natural regeneration of bird-dispersed native plants and fern species (particularly the splendid shining spleenwort, and the relict sickle fern Pellaea falcata).
More information about the site can be found in the ecological report by Melissa Marler, commissioned by FoM in 2013.
Batger Quarry in 1899 and in 2014 (looking eastward from Mt Eden Road)