The effect of industrial waste water on growth and development of four varieties (Dunkald, Shiralee, Ranbow, Oscar) of Canola (Brassica) shows that waste water was unsuitable for irrigation due to extensively high mineral and heavy metal contents. In addition, effluents were highly alkaline with high load of BOD, COD, TS and SAR values. The amount of iron, manganese, zinc and chromium was also quite high. The other physiochemical parameters of the tannery effluents viz., pH, alkalinity, acidity, total dissolved solids, suspended solids, chlorophyll content, chlorides and sulphides were also determined by using a suitable appropriate method. The growth and yield of plants was highly affected by effluents treatment, especially at higher doses from very initial stage to maturity leading to reduce biomass and seed production. The high load of heavyweight poisonous metals such as chromium (Cr), lead (Pb), mercury (Hg) etc. lead to decrease in the quantity and quality of crops. These heavy metals produce many diseases in plants and also in human beings. Therefore, the use of raji tannery effluent is not suitable for irrigation purposes because of its major difference in values pH, temperature, total dissolved solids, total suspended solids and total alkalinity with that of normal tap water.