Why Doesn’t My Lemon Tree Bear Fruit
I keep it indoors in the winter and in a sunny area outside once the weather stablizes. There's plenty of bees and butterflies, the soil is kept moist and I use Miracle Grow fertilizer.
Certified GKH Gardening Expert
I would try giving it some phosphorus rich fertilizer, like bone meal. If it is lacking phosphorus, it will not be able to produce blossoms (which means no fruit.)
The requirements for lemons are very similar to that of limes. 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