Variable Days to maturity. Midwest Mix Wildflower Seeds. Non-GMO, annuals, and perennials. The Midwest Mix of wildflower seeds has been specially formulated to thrive in midwestern states of the USA. States such as Iowa, Kansas, Nebraska, Minnesota, Michigan, and more are sure to find success with this beautiful mix of annuals and perennials. Featuring 17 different flowers and at least 12 different colors, this wildflower mix is sure to bring beauty where other flowers might struggle. About 40,000 seeds per oz.