Tree has beautiful leaves, about five feet tall. All but one fruit dried up at about 1/2-3/4 inch, turned black and fell off. The one that is left is looking wonderful.
Meyer Lemon Dropping Fruit
Certified GKH Gardening Expert
This is a pollination problem. It is common for container grown citrus trees as they are normally kept places where pollinators can't get to them. In the future, you may need to hand pollinate. This can be done with a small brush swirled gently inside the flowers.