Once you've picked 8-10 cups of blossoms you must remove the petals from the green portions. The petals have the flavor you are looking for, while the green leafy portions will have a bitter taste. There are a couple ways of doing this: you can pull the petals out by hand, or cut them off with scissors. If you pull them by hand you will get fewer green portions making for a better colored & flavored "broth." If you don't have all day to spend pulling petals then you can cut them with scissors.