The category five Cyclone Winston a year ago destroyed much of the country's kava crop, and farmers have struggled with regular flooding since.
The chair of the Fiji kava council, Rupeni Koro, said that had severely limited supplies of the popular root sedative, and the country was struggling to keep up with demand.
He said some markets have stopped selling kava, and where it was available, it now costs in excess of US$40 a kilogram - a 76 percent increase.
