When should trees and shrubs typically be fertilized for best results?

Fertilizing trees and shrubs during the first growing season is optimal because it allows the plants to establish their root systems while providing the necessary nutrients to support their growth. In this initial period, the plants are adapting to their new environment, and appropriate fertilization can promote healthy development and enhance their resilience to stress.

During the first growing season, trees and shrubs focus on setting roots and developing foliage, making it an ideal time to supply them with nutrients such as nitrogen, phosphorus, and potassium, which are vital for growth. Fertilizer can enhance this process by ensuring that the plants receive the essential nutrients they need for strong root and shoot development.

Fertilizing immediately after planting could risk over-fertilization, as the newly planted trees and shrubs need time to acclimatize. Similarly, fertilizing during fall or at the end of summer may not align with the growth cycle of the plants, as they may be slowing down or preparing for dormancy, making it less effective at boosting growth. Thus, focusing on fertilization during the first growing season caters specifically to the critical establishment period of trees and shrubs.