I have a potted lemon tree called lots of lemons, some of my fruit is maturing at infant stage and then falling off?
It's a great little tree, big lemons average 30 lemons a tree, but some are maturing at about a 5 cent piece size then dropping off.
Certified GKH Gardening Expert
These are actually aborted. This is the reason that it looks yellow in color. They are not ripening early, rather, they are not taking implantation of the pollen at all. This has several potential causes.
This article will help: https://www.gardeningknowhow.com/edible/fruits/lemons/lemon-tree-fruit-drop.htm