The article discusses the use of potting soil for growing annuals as a good growing medium for plants, particularly for containers, and how to save some money on potting medium. The author suggests that a lightweight 40-quathen bag of high-quality growing medium can be purchased for use in containers, not soil from your garden that is too heavy and won't drain well in a container. It's also recommended that containers with a drainage hole in the bottom should have a sufficient amount of water. During the growing season, plants use up the nutrients in their growing medium, replacing it with fresh, more than half the old medium mixed with the old. The old medium can also be used in garden beds or added to a compost pile that generates heat to kill weed seeds and pathogens. If you're planning to grow vegetables like tomatoes, peppers, and eggplants from the same plant family each year, you should completely change the growing medium each year to prevent disease.