I was needing the fu'u last winter and loving it. Don't know about Eua for sure but it's probably the same story. It seems kava can take 3 to 11 years to grow depending on strain, so yes it seems to take a while to replenish. If I find a kava that agrees with me I generally go back and purchase a few pds. of it so that I can enjoy it for a while as it runs out for some special strains and don't know when more will arrive.