African Marigold

• African marigold (Tagetes erecta) are the biggest of the annual marigolds. They grow up to about 3 feet and have flowers that can reach 5 inches across. African marigolds bloom from midsummer to frost. Blooms are single colors ranging from white to orange and have fully double blooms. Common varieties include Antigua, Crush and Aurora, each available in a variety of colors.
  
  

French Marigold

• French marigold (Tagetes patula) are smaller annual marigolds that are commonly seen in garden centers. Generally, they grow from 6 to 18 inches tall. French marigolds frequently sport bi-colored blooms from spring until frost, but are also available in solid colors ranging from white to deep red. Flowers are significantly smaller than the African marigold, but they are more resistant to heavy rains. Common varieties are Bonanza, Little Hero and Safari.
  
  

Signet Marigold

• Signet marigolds (Tagetes tenuifolia) are the tiniest of the common marigolds. These annuals usually only reach about 8 inches and have lemon-scented foliage. Signets are considered edible and the flowers are said to taste like tarragon. Flowers are small, single and bright, appearing in yellow, orange or rust colors. Common varieties include Golden Gem and Lemon Gem.
  
  

Lesser Known Varities

• The tangerine scented marigold (Tagetes lemonii) and Spanish tarragon (Tagetes lucida) are perennials that are winter hardy in parts of South Carolina and throughout the Southwest. Both are native plants that grow approximately 3 feet tall. T. lemonii is known for its minty-lemon scented leaves. T. lucida sports a licorish-flavored edible flower that is used in place of tarragon in hot and humid areas.