Anyone who has grown Bee Balm knows that it is very easy to grow and can become somewhat invasive in a spot it likes. The deep yellow or orange petals add a beautiful touch to a green salad and can also be used as a garnish. Calendula has a slightly bitter flavor, and it best used with tangier greens. Many people who lived through the Depression remember making a coffee substitute out of Chicory. Make sure you don't pick flowers on heavily traveled roads because of the pollution absorbed by the plant.
Chicory has a pleasant, mild-bitter taste that has been compared to endive.
Chamomile is a hardy perennial that prefers moist soil and full sun. Ragweed sufferers may also be allergic to Chamomile. It contains thuaone and should be eaten in moderation. If the yellow flowers are picked young, they have a sweet, honey-like flavor. Mature flowers are bitter.