No, we don't eat the daisies...
From the UUA website:
The Flower Ceremony, sometimes referred to as Flower Communion or Flower Festival, is an annual ritual that celebrates beauty, human uniqueness, diversity, and community.
Originally created in 1923 by Unitarian minister Norbert Capek of Prague, Czechoslovakia, the Flower Ceremony was introduced to the United States by Rev. Maya Capek, Norbert's widow.
In this ceremony, everyone in the congregation brings a flower. Each person places a flower on the altar or in a shared vase. The congregation and minister bless the flowers, and they're redistributed. Each person brings home a different flower than the one they brought.