The cheery yellow, cream, or orange blossoms of calendula (Calendula officinalis) light up a garden. Also known as pot marigold (though not related to marigolds), calendula flowers are edible. The peppery petals may be used as a garnish for salads or stirred into cream cheese or dips. For the best winter show, look for newer varieties that have better cold tolerance and a longer bloom time such as 'Winter Wonders Amber Arctic'.