The roots are the heart of the tree. Most of our soils are compacted and depleted of nutrients. When applied with this type of fertilization it reduces compaction, helps with pest resistance and disease. It also helps with frost and sunburn damage. When applied it promotes thick and healthy foliage. This can also be done to your small shrubs as well! It is applies directly to the root system. When said and done you will have a much healthier and happier tree!