B from Des Moines, Ia writes
Bayer Advanced 12 Month Tree & Shrub Insect Control provides season-long, systemic, residual control of insect pests on trees and shrubs for 12 months, so it would only be applied once a year when insects are present. Keep in mind that it can take up to 8 weeks for the product to translocate thoughout the shrubs so it is still possible to see insect activity during this time.
Answer last updated on: 07/25/2017
