This paper presents the development and implementation of robust control techniques based on the quantitative feedback theory (QFT) aimed at achieving adequate values of inside greenhouse temperature in spite of uncertainties and disturbances acting on the system. A modification of classical design approaches has been included to incorporate feedforward action (exploiting the availability of measurements of disturbances, which in the particular case of greenhouses are the main energy source) and an antiwindup action to account for frequent saturations in the control signal. Results obtained with this scheme using a validated nonlinear simulator of greenhouse dynamics are also included.