I'm a seed saver of flowers but don't know how to get them from several plants . Petunias, stock, pansy and several others. Does any one know of a web site that shows pictures of what they look like.
When dead heading the petunias put them in a basket with newspaper in the bottom. Leave in a dry place and check them once they are dried out you will see little tiny black seeds. Also if you throw the dead headed flowers on the ground near your petunias next year you will have petunias!