Q.Growing perfect lemons
Many of the lemons from my tree are thick skinned and some are pithy. what should I do to get beautiful, commercial quality lemons from my tree. Organic please.
This has just a few likely causes. It could be that there is too much Nitrogen in the soil, or the opposite. That there could be a lack of phosphorus in the soil. If you feed the tree once or twice a year and do not expect it to be a nutrient deficiency, then I would suspect that the soil pH is off. You can take a sample of the soil to your local extension service, and they will be able to test your soil and tell you if anything is off with it.
Here is an article on the subject: https://www.gardeningknowhow.com/edible/fruits/citrus/citrus-fruit-thick-rind.htm
Here is an article to help you find your local extension service: https://www.gardeningknowhow.com/extension-search/