Master Gardener: How to get fruit on a pineapple guava tree

Q: I have two pineapple guava trees that are three and four years old.  Both trees had many blossoms last year, but less than ten this year.  Neither tree has produced any fruit yet.  I water and fertilize them regularly.  They get full sun in the morning and partial afternoon sun. What can I do to get fruit?
A: Feijoas (or pineapple guavas) are a popular landscape shrub or small tree. They are not especially fast-growing, so it’s easy to keep them small and manageable.