In the 1983 concept plan, 413 plant species were identified, including 124 that were not native to the park. The park was noted as one of the few remaining significant areas of bushland in the foothills. By 2006, the flora list contained 411 species, with 107 of these non-native. Five of the native species were then noted as rare or vulnerable, including Prasophyllum pallidum (pale leek-orchid). The park has significant stands of pink gums (Eucalyptus fasciculosa) and long-leafed box (Eucalyptus goniocalyx). button daisy, pussy tail (Ptilotus macrocephalus), needlebush (Hakea sericea), silky guinea flower (Hibbertia sericea) and black rapier sedge (Lepidosperma carphoides) are common. black-boys (Xanthorrhoea), hop bush (Dodonaea viscosa ssp. spatulata) and tea-tree form the understory in parts of the park. The area around the ruins of Newman's Nursery is noted for its spring orchid display. Quarry floors have large plants typical of much of the Mount Lofty Ranges. Golden wattle (Acacia pycnantha) and drooping sheoak (Allocasuarina verticillata), as well as red gums (Eucalyptus camaldulensis), native pine (Callitris preissii) and blue gum (Eucalyptus leucoxylon) are common.