What Type of Fertilizer Do I Need?
Fertilizer is made up of macronutrients (Potassium, Phosphorus, and Nitrogen) and micronutrients (such as Manganese, Magnesium, and Iron). These minerals all have different effects on the maturation of a tree and different trees need different amounts. It is important to ensure that you use the right fertilizer for your tree. To find out how to obtain the correct fertilizer for your trees or shrubs, click here.
Where Do I Put The Fertilizer?
The purpose of using fertilizer is to put the macronutrients and micronutrients where they will best be taken up by the tree’s roots. Thus, it is necessary to fertilize throughout the entire root structure. In general, the roots extend well beyond the outer reach of a tree’s branches.
The fertilizer must also be placed underneath the roots of any competing plants such as grass or other ground cover. Spreading granular fertilizer on the lawn might make your grass greener, but it will likely not help your tree.
When Should I Fertilize My Tree?
A good time to fertilize in most northern temperate climates is from fall to mid-spring. At these times the tree’s roots take the nutrients from the soil and apply them to important health-promoting functions such as root development and disease resistance, rather than simply putting out new growth.
During the growing season, fertilizing can help a tree overcome mineral deficiencies and fight off infections. If you are fertilizing in mid- to late summer, avoid formulations high in nitrogen as this will just promote weak, new growth that may be easily damaged in the winter.
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