If you are lucky enough to have a guava, you may be wondering “when will my guava bear fruit?” Whether or not your tree has been pruned. That said, the plants are attractive and produce deliciously rich, sweet fruits that are excellent fresh or in desserts. Given enough guava tree. Guavas are flavorful tropical fruits that grow on a small tree with characteristic copper colored bark that peels off in curls. Guava trees do not produce fruit for several years, and may take up to four years to bear fruit. Spray your guava tree just before flowering in the spring.