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Tree and Shrub Care Services

Deep Root Tree Fertilization

Deep root fertilization injects nutrients directly into the root zone of trees, where turf and compacted soil can't compete for them. SPS uses deep root feeding to improve tree vigor, leaf color and resistance to drought, insects and disease, especially for trees in lawns, new plantings and stressed landscapes.

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Deep Root Tree Fertilization

Whether your trees are defoliated, looking tired, or actually seem to be doing fine, they can benefit from deep root fertilization. Healthy trees are better at fighting off insects and disease, and they stand up to extreme wet or dry periods much more easily than stressed trees. A healthy tree really does have better odds of surviving whatever the season throws at it.

Even if your landscape looks “okay,” preventive feeding keeps good trees from slowly slipping into decline. The ideal time for Deep Root Fertilization is in the fall, when trees are moving energy and nutrients down into their root systems

Our Custom Deep Root Fertilizer Blend

SPS Tree & Shrub Services offers deep root fertilization for maximum nutrients to trees. The fertilizer we use is not an off-the-shelf mix. It is a custom formulation blended specifically for Scientific Plant Service, then enhanced with additional nutrients and root-support products.
Our special blend contains:

12-24-24 fertilizer with slow-release nitrogen from Nutralene and humates

This provides a balanced supply of nutrients and a steady, controlled release of nitrogen, so trees get a long-lasting feed rather than a quick surge.

Chelated iron with manganese and nitrogen

Chelated micronutrients stay available in the soil longer and help support rich foliage color and strong growth, especially in trees that tend to yellow or look washed out.

Flowable sulfur

Sulfur helps adjust soil conditions and improves nutrient movement in the root zone, making it easier for trees to use the fertilizer and existing minerals in the soil.

Natural mycorrhizae

These beneficial fungi form a partnership with tree roots, expanding the effective root system and improving water and nutrient uptake. They are a key part of long-term root health.

Together, these ingredients support both the immediate needs of your trees and the long-term structure and function of their root systems.

How We Apply Deep Root Fertilizer

Deep root feeding is done with injection probes that place the nutrient solution directly into the soil around the tree, down in the root zone where fine feeder roots are most active. Our probes are equipped with digital meters so each tree receives the correct amount of solution.
By injecting below the surface, we avoid unnecessary competition with turf and groundcovers and make sure the fertilizer gets to the roots instead of sitting on top of the soil.

How Often Should Trees Be Fed?

Because of the longevity of our custom blend, we typically recommend deep root fertilization every other year. The formulation is designed to last, so trees continue to benefit well beyond the initial application.

Many companies using lighter or less stable products encourage yearly or even twice-a-year treatments. Our approach is different: a high-quality, long-lasting blend applied on a bi-annual schedule that keeps trees healthy and can save you money over time.
scientific plant service maintain tree health

Keep Weak And Healthy Trees Strong

It is easy to see the value of fertilizing weak or sick trees, but healthy trees need support too.

If you want your trees to handle insects, disease pressure, storms, and environmental stress with less trouble, feeding the root zone is one of the smartest steps you can take.

Deep Root Tree Fertilization helps:

  • Trees recovering from defoliation, stress, or poor site conditions.
  • Established trees that are slowly thinning or losing color.
  • Young trees that need to establish a strong root system early.
  • “Healthy” trees you want to keep that way for the long term.

Ready To Schedule Deep Root Feeding?

If your trees look weak, have been defoliated, or you simply want to keep a valuable landscape in top shape, Deep Root Tree Fertilization is a proven way to support them from the roots up. Call Scientific Plant Service or request a shrub and tree evaluation to discuss a deep root fertilization schedule tailored to your property.

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