Spirea Bushes Have Foam Dripping On Stems

Question From: J. Meeth - Lebanon, Missouri, United States
Q: My spirea bushes have foam dripping on the stems. Is this common and does it kill the bush?

A: My guess is your plants have spittle bugs. Spray them with a heavy stream of water to wash the critters away. They rarely do much damage. Best And Happy Yardening, Nancy