Should I Purchase A Japanese Maple That Has Yellow Powdery Substance On Some Branches

Question From: Grandville, Michigan, United States
Q: I am in the process of landscaping a new house and want to plant a Japanes Maple (short) tree in my front yard. The ones at my nursery have a yellow powdery substance on some of the branches at the crouch of branch and along the branches as well. Not covering the whole tree however. They're telling me its nothing to worry about but it's a $400 tree and I'm worried! Also, there is no horticulturist a this nursery, should I go elsewhere?

A: Powdery mildew attacks trees under stress. I would never buy a plant that is diseased. Best And Happy Yardening, Nancy