The Exotic Fruit Of Thailand-Rambutan or Ngoh Thailand Exotic fruit-Rambutan or Ngoh. simply thai rambutan or ngoh peak season may to september in Thailand there are two varieties of rambutan a fruit with a thick and hairy outer skin ngoh rong rian has sweet succulent flesh that clings to the seed while the oval shaped si chompoo the pink rambutan has crisp white flesh that comes off