Persian Lime Tree Problem
Leaves are drying out and curling up. The leaf color is grayish and gold in color. There is new growth at the trunk of the tree. Fruit buds not developing, they turn yellow and drop.
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These articles may help: https://www.gardeningknowhow.com/edible/fruits/lime/reasons-and-fixes-for-lime-tree-not-producing-blossoms-or-fruit.htm