Provided is a plant cultivation lamp used in a plant cultivation method including a step of independently performing a sequence of irradiating a plant with red light and a sequence of irradiating the plant with blue light within a certain period of time, including: a light irradiation unit that includes one or more red light emitting elements that emit red light and one or more blue light emitting elements that emit blue light； and a control unit that controls the light irradiation unit to independently turn on and off the red light emitting elements and the blue light emitting elements.
