Despite this use the land was in excellent condition, though evidence of grazing impact was visible in part of the eastern area of the reserve.

[3][4][5] The Drummond Nature Reserve is constructed with a series of lateritic hills with spillway deposits plus a small outcrop of bedrock.

The soil of the mallee area is a yellow sandy clay with the dominant plants being the low dense Eucalyptus drummondii and Allocasuarina.

There were two declared rare flora; the aquatic herb Trithuria leptogyne (this is the only known location of this species) and Eleocharis keigheryi in two population groups.

The occurrence of Cyathochaeta equitans is the only known inland population, as this species is found predominantly in the sands of the Swan Coastal Plain.