I have a Petunia integrifolia which I bought on a whim and have fallen in love with. I am assuming it is an annual and I am wondering how I can propagate the plant so I can enjoy it next year. I've looked for seeds on the plant and can't find any. But maybe they are just very small? How do I collect something I can't see? Should I take cuttings? Will the cuttings live through the winter? Any help will be appreciated. vicki Seattle, WA USA