My lemon tree in a pot drops fruit before they are set.
My Lemon Tree in a Pot Drops Fruit Before They Are Set
Certified GKH Gardening Expert
Most citrus trees will shed fruit if they do not have the nutrients and/or water to support the fruit. You can always expect some fruit drop as the tree evens things out, but if there is a lot of fruit loss, you can fertilize and increase water to the tree to help it keep its remaining fruit. Too much nitrogen fertilizer, however, limits fruit production. Adding more phosphorus should help with this, such as bone meal. This article will also help: https://www.gardeningknowhow.com/edible/fruits/lemons/lemon-tree-fruit-drop.htm