Optimum diversion oftotal  Biomassmanufactured by plants to  parts supporting economic end product is vital in commercial agriculture. The fraction of bio mass used for economic end product out of total biomass manufactured by the plants is termed as Harvest index Factors that decide optimization  of Harvest index  for  maximizing productivity in terms of economic end product vary with crops  and   their relevance In Tea cultivation  are brought out in  this paper.The physiological concepts have helped Agronomist to formulate guide lines  for managing Harvest in Tea culture

Keywords: Harvest index. Biomass apportioning, productivity