Last season I had many beautiful grape fruits. This season only a few, I used citrus fertilizer. Don't know what happened.
Certified GKH Gardening Expert
Some years will bear more than others, so this can be normal. I would have your soil sampled. This will tell you what is going on with your soil. Here is an article to find your local extension service. This is where you can take your samples: https://www.gardeningknowhow.com/extension-search/