Adelma Grenier Simmons (December 16, 1903 – December 3, 1997) was one of the leading herbal figures in America in the 20th century. A legend for her knowledge of herbal lore and history, she was also a prolific author and sparked an interest in herb gardening across the country. Known as "The First Lady of Herbs," she owned and operated Caprilands Herb Farm in Coventry, Connecticut, for over 55 years.