Why all young fruits fall off my orange tree

Question

The tree flowered fine. As soon as the fruit turns to 1/2 to 3/4 inch size, they fall off the tree. I live in clay soil type, but build about two feet of raised bed for the tree for drainage. Temperature is 65+ in the the morning and 80s during the day. The leaves seem to be healthy. This happens all the time.

Answer 1

This can indicate either poor pollination or poor water supply or nutrient supply. If the fruit is not pollinated, the tree will drop them. And if the tree does not have enough water or nutrients to support the fruit, the tree will also drop them.

This article will have more information:
https://www.gardeningknowhow.com/edible/fruits/oranges/no-fruit-on-orange-trees.htm