This investigation was carried out at Antoniades Research Branch, Horticulture Research Institute, Ministry of Agriculture, Alexandria, Egypt during 2014 and 2015 seasons. The study was a trial to investigate the effects of using Schinus terebinthifolius  extracted  (essential oil) at (0.3, 0.6 and 0.9 ml oil/L) as an environmentally safer treatment, Citric acid at (0.1,0.2 and 0.3g/L) and 8-hydroxyquinoline sulphate [8-HQS] at (100,150 and 200 mg/L) on the cut flowers of Zantedeschia aethiopica L. to define the best concentrations treatments to enhance the postharvest quality and the vase life. All treatments used caused a significant increase in the calla–lily vase life compared to control. The S. terebinthifolius essential oil treatments gave the lowestloss of flower fresh weight percentage (LFFW) in both seasons. The highest significant amount of water absorbed by calla- lily flowers were obtained from S. terebinthifolius essential oil treatment at 0.9 ml/L in both seasons which resulted in more freshness upon the cut flowers. The reducing sugar content obtained from all treatments was better than control. Both the treatment of 8-HQS at 200 mg/L and of 0.9 ml/L S. terebinthifolius essential oil prolonged the vase life of cut flowers. However the cut flowers resulted from the alternative environmentally safer treatment 0.9 ml/L of S. terebinthifolius essential oil at the end of the experiment, was more fresh compared with those of 200 mg/L of 8-HQS treatment.