Deep Root Fertilization | Concentrated Growth Formula For Trees

deep-root-fertilization-300x225Trees require certain essential elements or nutrients to function and grow. For trees growing in a forest site, these elements normally are present in sufficient quantities in the soil. Landscape tree or urban trees, however may be growing in soils that do not contain sufficient available nutrients for satisfactory growth and development. Top soil often is removed during construction. Leaves and other plant parts are removed in landscape maintenance, disrupting nutrient cycling and the return not organic matter to the soil. It may be necessary to fertilize or to adjust soil PH to increase nutrient availability.

Fertilizing a tree can increase growth and can under certain circumstances help reverse declining health. However, if the fertilizer is not needed or applied in correctly, it may not benefit the tree at all. In fact, it may increase susceptibility to certain pests and accelerate decline.  Trees with satisfactory growth and not showing symptoms of nutrient deficiency may not require fertilization. Trees growing  in turf that is heavily fertilized may not require additional fertilization. It is important to recognize when a tree needs fertilization, which elements are needed and when and how they should be applied.

Soil testing and plant analysis

The most accurate way to determine a trees nutrient needs is to obtain laboratory analysis of the soil and leaves to determine the need for fertilization three analyses should be considered.

  • Foliar nutrient analysis to determine the nutrient content of the leaves
  • Soil nutrient analysis to determine soil nutrient levels and salt content
  • Ph analysis to determine the acidity or alkalinity of the soil

Foliar nutrient analysis is used to determine the current nutrient content of leaves. Results provide information on which nutrients have been absorbed and trans-located within the plant. This method is most accurate for determining deficiencies of most elements. However it does not provide information on which the nutrients are deficient. Foliar nutrient analysis usually is more expensive than soil analysis.

A soil analysis can give information about the presence of essential elements , soil PH, organic matter, and cat ion exchange capacity. The PH and salt content are important for recommending treatments and selecting fertilizers. Matching the fertilizer nutrient content to the deficiency elements ensure that the proper nutrients are applied to correct the deficiency. By adding only the elements required, excess elements will not be added to the environment. The process of conducting analysis, setting plant health goals and selecting a fertilizer to achieve the goal is called “prescription fertilization”

It should be noted that a soil analysis will have greater value if done in conjunction with a foliar analysis.

Fertilizers can be applied to the soil or foliage, or they can be injected directly into the xylem of trees. Soil application is the preferred technique. Foliar spray or trunk injection should be reserved for rare cases when soil application is not effective or not practical to apply. Soil application includes Deep Root Injection and surface application with either a liquid or a dry formula. Deep root injection is the most common application method used by commercial arborists

Concerned that your soil lacks the nutrients that are vital for healthy vigorous trees?

Contact us today at (831) 508-8955 for a FREE cost assessment for prescriptive fertilization! We have over 25 years of professional experience and serve all locations in Santa Cruz & Monterey!