Vegetation is scarce in the arid climate. Vegetation at Llullaillaco begins at altitude with Acantholippia punensis, Atriplex imbricata, and Cristaria andicola. They are joined at altitude by Stipa frigida which can be found up to of altitude. The maximum vegetation density is found around with 12% of the surface and decreases thereafter, probably due to the low temperatures. At this altitude, Adesmia spinosissima, Fabiana bryoides, Mulinum crassifolium, and Parastrephia quadrangularis are found in addition to the previously mentioned plants. Above elevation there is no vegetation.