Potting compost has numerous synonyms that can be used to indicate the soil mix used for growing plants in containers. Some of the common terms used for potting compost include potting soil, container mix, planting mix, and growing medium. These terms signify the soil mixture that provides the necessary nutrients, moisture retention, and drainage for potted plants. Other synonyms for potting compost include peat moss, vermiculite, perlite, and composted bark. These materials are typically blended with garden soil to create the perfect potting mix for container gardening. Whatever you call it, the right potting compost is essential for healthy plants in patio pots, hanging baskets, and other planted containers.