White Foam On Catmint

Question From: L. Jelinek - Dubuque, Iowa, United States
Q: There is a white foam on my catmint. What is it and how do I treat it?

A: My guess is those are spittle bugs. They rarely do much harm to plants, especially catmint. I would wash the spit from the plants and rest easy. Best And Happy Yardening, Nancy