Materials and Methods
The different maturity stages (dark green, light green and greenish yellow) of Kradang Nga Chin flowers were harvested from King Mongkut’s University of Technology North Bangkok garden at 11 AM. The flowers were fumigated with 0 (control) or 900 ppm 1 –MCP for 1 hour. Subsequently, peduncles were soaked in 0, 100, 200, 500 and 1000 ppm ethephon solutions and kept at ambient room (34±2ºC; RH 67±10%) from 12 to 6 PM. The blooming, coloring and smelling were investigated every hour by photograph comparison and human nose sniffing for fragrance ranging score from scentless (-) to strong scent (+++++). Data were collected from 10 persons.