Bright yellow and orange flowers, historically used for medicinal and culinary purposes, come from easy calendula care when growing this simple flower. Commonly called the pot marigold, the calendula flower has long been a staple in British cottage gardens. Petals are used in cooking, and were used as yellow coloring in cheeses and butters in centuries past. While uses of calendula plants are diverse, growing calendula in the flower or herb garden is an optimum use of this attractive plant. Calendula plants are frost tolerant and somewhat cold hardy and add long-lasting colour and beauty in a flower bed or container.