Gardening Study School, Course III, Series 11, sponsored by Federated Garden Clubs of Iowa, April 7 (8:15 am.-4:15 pm.) and April 8 (8:15 am.-12:15 pm). Courses are open to the public and can be taken in any order. Topics will be Pruning, Factors Influencing Plant Growth, Techniques for Growing Outdoor Flowers, Classifying Plants, Teaching Tour on the Grounds of the Arboretum and Xeriscaping. Testing is available to work toward the Gardening Study Consultant certificate. Master Gardeners qualify for 10 hours continuing education for the course.