The calendula is a long time favorite among gardeners. Also called English marigold, this plant has been grown since the Middle Ages and was known to Shakespeare. Calendula is an annual flower that prefers cool growing weather but nevertheless are tender and killed by frosts. Depending on variety and culture, the plants grow 12-30 inches in height and about as wide. The leaves are bright green and typically about 4 inches long. The lower leaves are oval with a rounded tip (spatulate) and upper leaves are lance shaped with pointed tips. The flowers are typically 2-3 in diameter and held on thick sturdy stems. Calendulas are single or double flowered and come in a range of colors from cream to light yellow to electric yellow to orange. Some have dark brown centers and all are beautiful.
Calendula officinalis - Floridata, http://www.floridata.com/Plants/Asteraceae/Calendula%20officinalis/144 (accessed January 27, 2017).