To understand why coconut fiber is a special growing medium from an agronomic point of view, it is important to analyze the differences between a soil crop and a coir crop and compare the main factors that generate stress at the root level. The behavior of a plant is generally influenced by the micro-climate in the greenhouse and the rhizosphere. Using the highest quality coir fiber as a base will allow the maximum vegetative and productive response of the crops. Micro-climate conditions will always be common in any productive system, whether soil or hydroponic, therefore, we must look for differences at the root level.