AMITOF is a solid fertilizer with a high content of free L-tryptophan (15% w/w), an amino acid that is a precursor to auxin (IAA) involved in promoting root development, floral differentiation, and recovery from stress due to transplant, heat, drought, or salinity. Nitrogen promotes protein synthesis and, together with tryptophan, they act synergistically to enhance the rooting effect and increase plant yield.