Gloria from Lakeview Oregon writes
I live in Zone 4/5 so its still in low 20's at night. Would it be better to wait till its warmer to try to kill grubs. I would think they are still quite deep in the ground.
We recommend contacting your Local Cooperative Extension office for the best time to treat for grubs in your region. They are better familiar with soil temps, hatching times and conditions in your area. After speaking with them, you may contact a representative at 1-866-581-7378 and we can assist you with a product.
Answer last updated on: 04/13/2015