Test seeds to see if they are still viable if they are not from the current season. Moisten a paper towel and place 10 Mexican mint marigold seeds on the surface. Fold the paper towel and place in a plastic sandwich bag, then find a warm location. Check daily for signs of germination and after one week, count how many have sprouted to calculate the expected germination rate.
About this Author
Marie Notnats enjoys learning about new topics and teaching people new skills. She has been writing professionally since 2008. She is a professional horticulturist with a Bachelor of Science degree in horticulture from Brigham Young University. She writes for About.com, Examiner.com, eHow, and assorted gardening blogs.