The aim of the present work is to study the free convection flow and heat transfer through a viscous incompressible electrically conducting fluid along an isothermal vertical porous non-conducting plate with time dependent suction and exponentially decaying heat generation in the presence of transverse magnetic field. The governing equations are solved numerically using cubic B-spline collocation method. The effects of various parameters on velocity and temperature distributions, skin-friction and Nusselt number are studied.