Monarch butterfly (IMAGE) Iowa State University Caption Planting milkweed and other wildflowers is essential to support population growth for monarch butterflies. A recently published journal article focused on the placement of new monarch habitat provides an overview of 20 Iowa State University research studies. Credit Photo by Jacqueline Pohl. Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.