"Powdery Mildew - Nemesis of the Northwest"

"Powdery Mildew , Nemesis of the Northwest" is a favorite subject of all gardeners whether you grow vegetables, ornamentals or flowers (especially dahlias). I will take you on a journey through the research that will help you understand where it comes from, why it appears and how you can manage your garden to prevent the spread. Come enjoy and bring your questions.