Q.Blossoms Don\’t Produce Fruit
I anticipated a bumper crop of pineapple guavas this year, as my 4-year old trees had dozens of big blossoms. Similarly, my cherimoya trees of similar age had dozens of blossoms that I had hand-pollinated with a small paint brush. And my 5-year old avocado tree had a number of flowers. Yet the guava produced NO fruit this summer, the cherimoyas less than a handful of fruit, and the avocado NO fruit. I water and fertilize regularly and the trees all seem healthy. I live near the beach in So. Cal, by the way. What’s going on? Thank you!

Certified GKH Gardening Expert
The Guava and the Cherimoya will, most likely, be a problem with soil fertility! They are heavy feeders, and this means that they will require quite a bit of fertilization. These articles will help:
https://www.gardeningknowhow.com/edible/fruits/guava/guava-tree-wont-fruit.htm
https://www.gardeningknowhow.com/ornamental/trees/annona/cherimoya-tree-info-and-care.htm
As for your avocado- This is going to require two trees. One for each flowering type. Here is an article that will help:
https://www.gardeningknowhow.com/edible/fruits/avocado/avocado-tree-with-no-fruit.htm

Thank you very much, Bush Doctor. Those links were relevant and quite helpful!