The best soil mix for container fruit trees, including potted fig trees, should be well-draining and rich in organic matter. A recommended soil mix for potted fig trees is a combination of two parts loam, one part sand, and one part organic matter. This mix provides adequate drainage to prevent waterlogged roots, which fig trees dislike. The organic matter supplies essential nutrients for healthy growth. Additionally, it's essential to ensure that the soil is slightly acidic to encourage optimal growth. Potted fig trees require proper care and attention, including regular watering and appropriate fertilization, to thrive and produce delicious fruits. By using this well-balanced soil mix and following proper care practices, your container fruit trees will have the best chance of success.