The understorey is the layers of vegetation below the tree canopy. Plants in the understorey are shrubs, grasses, ground covers and wildflowers. This vegetation is critical for ecosystem function as habitat for wildlife.

Much of Merri-bek's open space is characterised by large, grassed areas with trees. More complex vegetation is needed to support a healthy ecosystem.

The Native Understorey Project will improve biodiversity outcomes on Council managed land.

Locations for planting have been guided by habitat connectivity research into 12 animal focal species. Increasing understorey planting is a continued focus under the Merri-bek Nature Plan.