A method for folding wind blades of a wind turbine having folding blades, said wind turbine comprising: - a rotor unit comprising a rotor body arranged to rotate about a rotor axis; - a tower adapted to support said rotor unit, said tower defining an outer lateral surface of tower; - two blades each defining a respective blade longitudinal axis arranged along a main direction of blade extension, and an outer surface of blade, said blades being engaged to the rotor body to rotate with respect to each other about a hinge axis between an unfolded stopped angular position and a folded position, wherein, in said unfolded stopped angular position, both the blades are arranged with the respective blade axis along a same unfolded blade axial plane (W-W) comprising said rotor axis, in positions which are opposite to each other with respect to the rotor axis, in order to be able to be affected by the wind to bring said rotor body into rotation about said rotor axis, and wherein, in said folded position, said at least two blades are angularly close to each other and placed side-by-side with the tower; - at least one actuator arranged to rotate the two blades with respect to each other between the unfolded stopped angular position and the folded position; - for each of said two blades, a blade joint interposed between the rotor body and a blade fastening end, comprising a blade orientation actuator adapted to actuate the rotation of the blade about the blade longitudinal axis; - a blade unfolding/folding control unit having an input for receiving an unfold/fold command signal, said control unit being operatively connected with said at least one actuator and said blade orientation actuator; said method for folding wind blades being characterized in that it comprises the steps of: - stopping the rotation of the rotor body in a preset stopped angular position, with blades in the unfolded position; - rotating the two blades with respect to each other from the stopped angular position to the folded position, about said hinge axis, wherein said two blades are arranged substantially along said tower; - orientating said two blades so that the outer surface of blade is arranged at least partly tangent to said outer lateral surface of tower, by actuating said blade orientation actuator; - said step of stopping the rotation of the rotor body, said step of rotating the two blades, said step of orientating the two blades being controlled by means of said blade unfolding/folding control unit. - a rotor unit comprising a rotor body arranged to rotate about a rotor axis; - a tower adapted to support said rotor unit, said tower defining an outer lateral surface of tower; - two blades each defining a respective blade longitudinal axis arranged along a main direction of blade extension, and an outer surface of blade, said blades being engaged to the rotor body to rotate with respect to each other about a hinge axis between an unfolded stopped angular position and a folded position, wherein, in said unfolded stopped angular position, both the blades are arranged with the respective blade axis along a same unfolded blade axial plane (W-W) comprising said rotor axis, in positions which are opposite to each other with respect to the rotor axis, in order to be able to be affected by the wind to bring said rotor body into rotation about said rotor axis, and wherein, in said folded position, said at least two blades are angularly close to each other and placed side-by-side with the tower; - at least one actuator arranged to rotate the two blades with respect to each other between the unfolded stopped angular position and the folded position; - for each of said two blades, a blade joint interposed between the rotor body and a blade fastening end, comprising a blade orientation actuator adapted to actuate the rotation of the blade about the blade longitudinal axis; - a blade unfolding/folding control unit having an input for receiving an unfold/fold command signal, said control unit being operatively connected with said at least one actuator and said blade orientation actuator; - stopping the rotation of the rotor body in a preset stopped angular position, with blades in the unfolded position; - rotating the two blades with respect to each other from the stopped angular position to the folded position, about said hinge axis, wherein said two blades are arranged substantially along said tower; - orientating said two blades so that the outer surface of blade is arranged at least partly tangent to said outer lateral surface of tower, by actuating said blade orientation actuator; - said step of stopping the rotation of the rotor body, said step of rotating the two blades, said step of orientating the two blades being controlled by means of said blade unfolding/folding control unit.