Tree kept indoors during cold months and in full sun on deck during warm weather. Tree looks very healthy and free of insects. Blossoms everywhere but they drop before forming fruit.
Lime Tree Blossoms Heavily but Drop Before Fruiting
Certified GKH Gardening Expert
How old is your lime tree? Lime trees need to be at least 3-4 years old before they are mature enough to bear fruit.
When it blooms, is it indoors? When they bloom indoors, they can suffer from blossom drop because no pollinators (bees) have access.
Here is an article on the reasons for lime blossom drop that may be helpful: