I had two vines of Cassa. The fruits had absolutely no smell and the ripe fruits could not be eaten as there was hardly any flesh to eat being full of seeds. In little flesh there was, was tasteless . I ate a tender one, it was like eating a firm crunchy cucumber. May be the seeds I bought from TopTropicals or Tradewinds was no good. I had let the vine up a tree and they started spreading to the neighboring betelnut trees and smothering them, so I cut down the vines.The seeds sprout very easily if soaked in warm water and placed between moist towels.