Published on Monday, September 28, 2026

Dormant oil is an effective treatment for protecting trees and shrubs from pests. This horticultural oil suffocates overwintering insects, reducing infestations without harming beneficial organisms. It's best applied in early spring, around March or April, before new growth begins. While you can apply it yourself, hiring professionals ensures proper timing, application, and plant care. Professionals bring expertise and a comprehensive approach that enhances the health and beauty of your...