In this article, the influence of the convective boundary condition of free convection flow over a permeable vertical plate in porous medium saturated with a micropolar fluid is investigated. In order to analyze all the essential features, the transformed nonlinear conservation equations are worked out numerically by Spectral Quasi-Linearisation Method. By insisting the comparison between suction and injection effects, the physical quantities of the flow and its characteristics are exhibited graphically and quantitatively with various parameters.