Humic materials are complex organic mixtures used in agriculture in connection with soil, roots and nutrient interactions. They are not a single pure substance with one behaviour.
Their source, preparation and concentration help determine what a particular material is suited to do.
Why they interest growers
Growers encounter humic products when looking at the environment around roots and how nutrients interact with organic materials. These are different questions from simply supplying more nitrogen or potassium.
Research has tested specific humic products in a variety of crops. An extensive maize field study in Iowa recorded growth responses, while not finding consistent changes in measured soil properties or crop nutrient concentrations. The result is a useful reminder to distinguish the effects actually measured from a much longer list of possible benefits.
What we look for
We look for a documented source, a clear specification and useful behaviour in the intended formulation. The extraction and analytical method matter when comparing concentration claims.
A dark colour is not a quality certificate. Nor does the word leonardite, by itself, tell you the characteristics of an extract made from it.
Where you will meet them
Humic materials appear in the documented ingredient records for ÉLAN and UPTHRIVE, and in the KICKOFF formulation record. Each product needs to be understood by its own role and instructions.
Reviewed 8 October 2026