Try This Marigold.

The article offers information on the attribution of signet marigold, Tagetes tenuifolia, in the U.S. It is an annual flower that develops a rounded, billowy form which is 12 inches tall, although its flowers are smaller than those of bedding types, they are more profuse and less brassy. Some sources reveal that the flowers are edible and impart a lemony flavor to salads, pasta and vegetable dishes.