If I grow petunias from a seed are the flowers safe to be used as food decoration. Can they safely be eaten?
According to poison.org and the University of California they're non-poisonous. This does not mean that they're a tasty edible, however. Personally, I'd use nasturtiums instead of petunias - those flowers are IMO prettier and they're definitely edible. If you're making your food decoration in mid-summer and want a trumpet-shaped flower, then use a small-flowered daylily like the ubiquitous Stella d'Oro. Daylily flowers are also edible.