Salinity and bad quality irrigation water is very common problem in Pakistan due to limited rainfall, more evapo-transpiration and high temperature. So, there is need to select salt tolerant plants. In view of that a pot experiment was conducted to study the growth performance and ionic composition of Conocarpus erectus L. under saline – sodic conditions. Sixteen treatments i.e. (T1=<4(dSm-1) + <15 (mmol L-1)1/2, T2= 20(dSm-1) + 20 (mmol L-1)1/2, T3= 20(dSm-1) + 40 (mmol L-1)1/2, T4= 20 (dSm-1) + 60 (mmol L-1)1/2, T5= 20 (dSm-1) + 80(mmol L-1)1/2, T6= 20(dSm-1) + 100 (mmol L-1)1/2, T7= 30(dSm-1) + 20(mmol L-1)1/2, T8= 30(dSm-1) + 40(mmol L-1)1/2, T9= 30 (dSm-1) + 60(mmol L-1)1/2, T10= 30 (dSm-1) + 80(mmol L-1)1/2, T11= 30(dSm-1) + 100 (mmol L-1)1/2, T12= 40(dSm-1) + 20(mmol L-1)1/2, T13= 40(dSm-1) + 40(mmol L-1)1/2, T14= 40 (dSm-1) + 60(mmol L-1)1/2, T15= 40 (dSm-1) + 80(mmol L-1)1/2 and T16= 40(dSm-1) + 100 (mmol L-1)1/2) were evaluated in order to assess their effect on plant growth and ionic composition. Results revealed that increasing levels of salinity and sodicity had negative effect on all plant growth parameters i.e. plant height, number of leaves and branches. While owing to dual stress of salinity and sodicity minimum percentage increase over control was noticed in T16 having EC (40 dSm-1) and SAR 100 (mmol L- 1)1/2. Results showed that sodium concentration increased with increasing salinity/ sodicity, while potassium in leaf samples was decreased. Maximum K/ Na was depicted in control while minimal at the highest level i.e. T16.