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You did not specify the syzygium you have but, it looks to be Syzygium cumini (Eugenia jambolam) native to India. It will fruit in 2-3 months This variety is invasive in many parts of the world, inclusive in northeast Brazil. Fruits are pink, sweet and tasty. In Goa they make wine of the fruits. Consumption of fruits and seeds in powder form has been shown to lower blood glucose levels but it cannot be used to treat diabetes as the problem of standardization has not been worked yet.