Q.lime tree never produced fruit
How long before a lime tree will produce fruit? Mine is about 2 1/2 yrs old. Had buds the first year I purchased but none since. What can I do?

Have you fertilized? Nitrogen encourages leaves to grow, but not fruit. Too much can actually keep a plant from producing fruit. This article has information on how to fertilize your trees: https://www.gardeningknowhow.com/edible/fruits/citrus/fertilizing-citrus-trees-best-practices-for-citrus-fertilizing.htm
Sometimes when fruit trees produce produce little to no fruit, the soil may be lacking phosphorus. Add bone meal and have your soil tested. This article will explain more:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm
If you have not read it yet, this article may also be helpful: https://www.gardeningknowhow.com/edible/fruits/lime/reasons-and-fixes-for-lime-tree-not-producing-blossoms-or-fruit.htm