Rue , a shrubby aromatic herb ideal for sunny rooftops, drought resistantEach order contains eight plants This shrubby aromatic herb has been used for medicinal and culinary purposes for centuries. It is rarely used nowadays in American cuisine because the leaves have a bitter flavor. Rue grows best in full sun but tolerates light shade. It must have good drainage to survive, however. Rue has fine texture blue green foliage and bears yellow flowers in summer. Rue self seeds, so remove flower heads before they set seed to