Calendulas are easy to grow herbaceous perennials that are treated as annuals. They will grow in a variety of soil types and need a lot of water. Both the leaves and flowers are edible and make a pleasant tea in small doses. The leaves can be added to salads, and taste either bitter or sweet. Calendulas also make great companion plants as they attract pollinators. A beautiful yellow natural dye is made from the flower petals. It is used culinary, medicinal and cosmetic.