Fresh flowers and leaves offer beautiful and sometimes even flavorful additions to cakes, but be sure to choose only those flowers that have not been sprayed and are safe for human consumption. Not all flowers are edible and some are highly poisonous. Edible flowers include apple blossoms, borage flowers, citrus blossoms (orange and lemon), daylilies (not tiger lilies, which have spots), English daisies, hibiscus, hollyhocks, honeysuckle, lilacs, nasturtiums, pansies, petunias, roses, tulips, and violets. Rose geranium leaves and mint leaves also make lovely and aromatic garnishes, especially when sugared. You can also buy crystallized flowers. The most breathtaking ones are made by Sweetfields.