A Quick Guide to Deep Root Fertilization for Trees

Deep liquid root fertilization is a common method used to compost and enrich trees. It is a controlled process of fertilization in that the fertilizer treatments are directly injected into the tree’s root system for an expedited effect, which further supports and assists in the tree’s initial development. Deep root fertilization should be performed in the early spring or fall for best results.

For large-scale or commercial projects, high-powered tree service equipment is required to perform deep root fertilization properly. For residential tree fertilizing jobs, a professional arborist will use tools like “soil needles” or deep root feeders. For personal projects, it is possible to provide deep root fertilizer treatments to your landscaping trees without the help of a professional service.

Continue reading to learn how to process of deep liquid root fertilization can be done all on your own.

Fishers Tree Services 317-537-9770

Fishers Tree Services 317-537-9770

Needed Supplies:

Drain Spade
Slow-Release Liquid Fertilizer
Protective Eye Goggles
Protective Gloves
Power Auger (Optional)

Getting Started:

Use your drain spade to dig narrow holes around the base of your tree. You have the option of using a power auger here if you like, but a drain spade should work well. Make the holes 2 to 3 feet apart, but 6 to 12 feet from the actual base of the trunk. Each hole should be between 8 to 12 feet deep.

Locate the tree’s drip line. Create an additional outer ring of holes along the perimeter of the tree’s drip line. Be sure to retain all soil for re-filling purposes.

Choose your liquid fertilizer. Look for a 10-10-10 combination product that contains mycorrhiza. This will reduce your trees susceptibility to soil pollutants and promote a strong root system at once. You will need a ½ gallon of liquid fertilizer for every hole.

Pour a ½ gallon of liquid fertilizer directly into each hole that you’ve dug around your tree. Wait for the liquid to fully absorb in every hole, and then refill each one with the soil you’ve saved. Avoid combining fertilizers since this can actually have a damaging effect on your trees.

Do You Need Professional Tree Care?

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Fishers Tree Service 317-537-9770

Call 317-537-9770 for professional and affordable Fishers tree service to keep your trees healthy all season long. We are experienced tree care contractors who provide a wide range of residential and commercial tree services, including routine tree service, major tree work, lot clearing, and more.