Sour Guava

denise1 says...
Some plants will take a few crops before the sweetness develops. If it is sour then you know it probably has heaps of vitamin C. You could cook em up with some sugar or with some other sweeter fruit. You could try plant another nearby in case it is permanently sour. I am assuming that your tree is the tropical guava= Psidium guajava, and not the red strawberry guava which are small and either red or yellow and usually a bit sour.