Key Lime Tree

Question

Leaves are curled up and many fall off.

Answer 1

Try to keep your lemon on the slightly dry side of evenly moist. Citrus do best with consistant watering. They do not appreciate being kept too wet nor allowed to dry out.

This article should help: https://www.gardeningknowhow.com/edible/fruits/lime/lime-tree-leaf-drop-why-a-lime-tree-is-losing-leaves.htm