What is the best time to apply fertilizers to trees and shrubs?

The optimal time to apply fertilizers to trees and shrubs is early spring before new growth begins. This timing is crucial because it coincides with the natural growth cycle of many trees and shrubs. During early spring, as temperatures rise, plants begin to mobilize their stored nutrients to support the new growth that will emerge as the season progresses. Applying fertilizer at this time ensures that the nutrients are readily available when the plants need them most, promoting healthy bud development, leaf expansion, and overall vigor.

Early spring application helps in maximizing nutrient uptake during the active growth period. The increased activity in the root system during this time allows trees and shrubs to take full advantage of the nutrients provided. Additionally, soil temperatures start to warm, which enhances nutrient availability, particularly in soils where certain nutrients may become more accessible.

In contrast, late summer after blooming might not be effective because trees and shrubs are transitioning into dormancy, and they may not utilize the nutrients effectively. Applying fertilizer during mid-winter could also be counterproductive, as many plants are fully dormant, and nutrient uptake is minimal during this time. Finally, fertilizing in the fall before leaf drop can lead to nutrient runoff as plants prepare for dormancy, potentially wasting resources and impacting the environment.

Selecting early spring