Good Morning,
Rambutan shows best in rainfield area with high humidity as tropical weather.
narmally it release the first yield at 4th year eventully. but I dont know where and which area You have planted? we do buy in lot as one the tropical produce exporters.
also we do take contract farming exotica papaya and mangeteen, ramputon.
further more information do contact us
regards,
sheriff Ags.