When to fertilize shrubs in the landscape..

Fertilizing ornamental shrubs and trees in the landscape should be timed to support healthy growth, flowering, and resilience against stress. The best times to fertilize depend on the plant type, climate, and soil conditions, but general guidelines include:

   •   Early Spring (Before New Growth Begins) – This is the ideal time to apply fertilizer, as it provides essential nutrients for vigorous growth and flowering. Slow-release or balanced fertilizers work well to sustain plants throughout the growing season.

   •   Late Spring to Early Summer – If needed, a second application can be made, especially for fast-growing or heavy-feeding plants. This helps maintain strong foliage and root development.

   •   Late Summer to Early Fall (Optional) – Light fertilization can support root growth before dormancy, but avoid high-nitrogen fertilizers, which can stimulate new growth that may be damaged by frost.

   •   Avoid Late Fall and Winter Fertilization – Most trees and shrubs enter dormancy in cold weather, and fertilizing during this time can lead to weak, untimely growth.

Always consider soil testing to determine nutrient needs and choose fertilizers accordingly.  Slow release fertilizers like 18-5-10 6 month are good to slowly feed all season long.