Q.Why do blooms and small fruit fall off orange trees
When the tree first starts putting on blooms they all fall off. We fertilize and water but nothing seems to stop the problem
One problem may be that your tree is still young. It is also quite natural for an orange to drop blossoms and small fruit. Fertilizing and water will not help, as long as you've kept up a good cultural regime. Here are a couple of articles that should help you be more comfortable with what is happening to your orange tree: https://www.gardeningknowhow.com/edible/fruits/citrus/citrus-blooming-season.htm
https://www.gardeningknowhow.com/edible/fruits/oranges/growing-an-orange-tree.htm
https://www.gardeningknowhow.com/edible/fruits/citrus/fertilizing-citrus-trees-best-practices-for-citrus-fertilizing.htm
https://www.gardeningknowhow.com/edible/fruits/oranges/no-fruit-on-orange-trees.htm