Abstract: The objective of this study was to extend patummas shelf life by using a substance against ethylene action, 1-Methylcyclopropene (1-MCP). The experiment was arranged in a Factorial in completely randomized design, composed of two factors : 1-MCP concentration at four levels (0, 300, 600 or 900 ppb) and period of fumigation at two levels (4 or 8 h) in a hermetically sealed plastic bucket (50 L) at 25°C. Afterwards, the treated and untreated flower stems were dipped in a plastic bottle filled with distilled water and stored in ambient temperature (27.5°C, 91% R.H.). Each treatment consisted of 10 replicates, one flower per replication. The experiment was carried out from June to August, 2008 at the laboratory of the Division of Agricultural Technology, Faculty of Technology, Mahasarakham University, in the Northeast of Thailand. The results showed no obvious differences in shelf life, except that the flower-treated with 600 ppb of 1-MCP for 8 h had the least storage life of 6.40 days. Treatment with 1-MCP had no effect on water uptake, rot appearance and wilting percentage. In addition, flower-treated with 1-MCP at 600 and 900 ppb for 4 and 8 h retained a higher content of anthocyanin by 26.57 and 16.32 mg/100 g Fresh Weight (FW) by 4 and 10 days after vase life (DAV), respectively.