With an ever-increasing demand for more food supply, agricultural scientists will have to search for new ways and techlogies to promote food production. In recent decades, plant growth regulators (PGRs) have made great strides in promoting plant growth and development. PGRs are organic compounds which have the ability to dramatically affect physiological plant processes when present in extremely low concentrations (in the range of micro-to picograms). Although all higher plants have the ability to synthesize PGRs endogeusly, they do respond to the exogeus sources most likely due to t having the capacity to synthesize sufficient endogeus phytohormones for optimal growth and development under given climatic and environmental conditions. In recent years, PGRs have established their position as a new generation of agrochemicals after pesticides, insecticides and herbicides. Interest in the commercial use of PGRs for improving plant growth and crop yields is also increasing because of their n-polluting nature. The use of PGRs in the post-harvest techlogy is well established and many new breakthroughs have recently been revealed.