This investigation was carried out during 2007-2008 to determine whether the selected chemical agents can be used to improve the post-harvest quality of snapdragon (Antirrhinum majus, L. cv. Riesen Vorbote) spikes, freshly cut flowering spikes were placed in glass bottles containing 100 ml of preservative solutions [distilled water or 8-hydroxyquinoline sulfate (8-HQS) at 200ppm or silver thiosulfate (STS) at 0.2mM] with or without sucrose at 20 g/L. Compared to the control, all treatments improved the quality and vase life of the flowers. Vase solutions containing 8-HQS plus sucrose was the most effective in promoting water uptake, percentage of maximum increase of spikes fresh weight so that the vase life of cut spikes extended to 18 and 16 days during the first and second seasons, respectively. The results indicated that using 200ppm 8-HQS combined with 20 g/Lsucrose has the potential to be used as a commercial cut flower preservative solution for delaying flower senescence, prolonging the vase life and enhancing post- harvest quality of snapdragon cut flowers.