The present work aimed to study the effects of some preservatives materials treatments{Silver thiosulphate (STS), 8-hydroxy quinolene sulphate (8-HQS), sucrose (S), ethanol extracts from sweet basil (Ocimum basilicum L., Labiatae) and German chamomile (Matricaria chamomilla L., Compositae)} as pulsing solutions and {sucrose (S), 8-hydroxy quinolene sulphate (8-HQS) and citric acid}as holding solutions as well as their combination ones on the postharvest characters, water relation characters, bacterial counts and some chemical constituents of Strelitzia reginae cut flower spikes. In addition, the data recorded were postharvest characters (longevity and floret opening percentage), water relation characters (water balance), average of bacterial counts in vase solution and some chemical constituents (anthocyanin pigments and the percentages of total sugars). Generally, the higher quality and the longest vase life of Strelitzia reginae cut flower spikes were obtained by using the interaction treatments between silver thiosulphate (STS) (0.463 mM) for 30 minutes then 10% sucrose (S)+200 ppm 8-hydroxy quinolene sulphate (8-HQS) for 12 hours followed by silver thiosulphate (STS) (0.463 mM) for 30 minutes then 10% sucrose (S)+200 ppm ethanol extracts from sweet basil as pulsing solutions and holding solution contained (sucrose at 5%+8-hydroxy-quinolene sulfate at 200 ppm+citric acid at 150 ppm) compared to the other ones under study.