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Imagine the hue of the sky on a crisp spring day, and you'll have the color of blue marguerite's petals in mind. This South African native is hardy in Zones 10-11 and is commonly grown as an annual, adding a surprising splash of blue to containers, beds, and borders. Pair it with yellow-flowering plants, such as yellow calibrachoas, to highlight its bright yellow center.
Blue marguerite grows best in full sun and well-drained soil. It does not do well in the hot, humid conditions of the Deep South. Take cuttings in fall, and root them in moist potting soil. Overwinter plants in a bright window, and replant in spring.