Do I need to rid the soil of powdery mildew fungus before planting something new?

Question: I have transplanted flocks which had powdery mildew in its first garden to the second garden. In their second garden powdery mildew returned the following summer. I want to plan something different there next year. Do I need to do something to the soil to rid it of the powdery mildew fungus? Answer: Caragh read more Do I need to rid the soil of powdery mildew fungus before planting something new?