Though there are five known attempted introductions to Reunion Island between 1793 and 1875, only the 1822 introduction was successful. It is likely that almost all the vanilla grown in the areas surrounding the Indian Ocean are descended from this one introduction and this is supported by modern genetic research.
There were multiple attempts at introducing vanilla to Reunion Island between 1793 and 1875, but only the 1822 attempt was successful. It is likely that most of the vanilla in the Indian Ocean region descends from this introduction, as supported by modern genetic research.