A method for mounting a wind power plant rotor blade to a nacelle of a wind power plant, wherein the wind power plant rotor blade comprises a rotor blade root area, a rotor blade tip area, a rotor blade leading edge, a rotor blade trailing edge, a rotor blade longitudinal axis, a rotor blade inner section, a rotor blade outer section, as well as at least one dividing plane between the rotor blade outer section and the rotor blade inner section, wherein the rotor blade can be split along the dividing plane, and a respective reinforcement area in the rotor blade inner section and the rotor blade outer section, which each are arranged next to the dividing plane, wherein the at least one dividing plane and the reinforcing area are configured such that the rotor blade is of a multi-part design by splitting along the dividing plane, wherein, after splitting the rotor blade along the dividing plane, the reinforcement area on the rotor blade inner section can be fastened to the reinforcement area of the rotor blade outer section with the following steps: checking the logistical restrictions on an installation site of the wind power plant, selecting a one-part or multi-part rotor blade based on the logistical restrictions, manufacturing a wind power plant rotor blade in a one-part version in a main die, splitting the wind power plant rotor blade manufactured in one part along at least one dividing plane based on the logistical restrictions, so as to obtain at least one rotor blade inner section and at least one rotor blade outer section, transporting the rotor blade inner section and the rotor blade outer section to the installation site separately from each other, joining the rotor blade inner section and the rotor blade outer section together at the installation site, and mounting the assembled rotor blade on the nacelle of the wind power plant or transporting the undivided rotor blade to the installation site and mounting the undivided rotor blade to the nacelle of the wind power plant. wherein the at least one dividing plane and the reinforcing area are configured such that the rotor blade is of a multi-part design by splitting along the dividing plane, wherein, after splitting the rotor blade along the dividing plane, the reinforcement area on the rotor blade inner section can be fastened to the reinforcement area of the rotor blade outer section with the following steps: checking the logistical restrictions on an installation site of the wind power plant, selecting a one-part or multi-part rotor blade based on the logistical restrictions, manufacturing a wind power plant rotor blade in a one-part version in a main die, splitting the wind power plant rotor blade manufactured in one part along at least one dividing plane based on the logistical restrictions, so as to obtain at least one rotor blade inner section and at least one rotor blade outer section, transporting the rotor blade inner section and the rotor blade outer section to the installation site separately from each other, joining the rotor blade inner section and the rotor blade outer section together at the installation site, and mounting the assembled rotor blade on the nacelle of the wind power plant or transporting the undivided rotor blade to the installation site and mounting the undivided rotor blade to the nacelle of the wind power plant. checking the logistical restrictions on an installation site of the wind power plant, selecting a one-part or multi-part rotor blade based on the logistical restrictions, manufacturing a wind power plant rotor blade in a one-part version in a main die, splitting the wind power plant rotor blade manufactured in one part along at least one dividing plane based on the logistical restrictions, so as to obtain at least one rotor blade inner section and at least one rotor blade outer section, transporting the rotor blade inner section and the rotor blade outer section to the installation site separately from each other, joining the rotor blade inner section and the rotor blade outer section together at the installation site, and mounting the assembled rotor blade on the nacelle of the wind power plant or transporting the undivided rotor blade to the installation site and mounting the undivided rotor blade to the nacelle of the wind power plant.