Farmers around the world use crop rotation to naturally fertilize plants. The concept is to change what crop we’re putting in a certain field each year. Plants use different nutrients and put other nutrients back into the soil. The result is that if crops are rotated, the nutrients are replaced and the soil needs less fertilizer. I personally don’t use this method because my plants grow all year round in Ecuador. But if you live in a climate with winter, and you plant new plants each year, then consider rotating where you put specific plants in your garden.