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Here is a way to fertilize your trees ๐ŸŒฒ

When fertilizing trees and shrubs, keep these two points in mind: Fertilizer is beneficial when it is needed; but try & use it in the right amount, at the right time and in the right place! ๐Ÿ‘๐Ÿป Always get a soil test. We highly recommend it before starting any size project. Soil Test: A soil test determines the acidity or alkalinity (pH) of the soil, along with the levels of nutrients that are present. Depending on the results, you may need to add nutrients to make up for any deficiencies in the soil. For more information on soil testing refer to the fact sheet.

https://agriculture.okstate.edu/departments-programs/plant-soil/soil-testing/index.html?forwareded=soiltesting.okstate.edu/