Mowing device (1) for plants, comprising at least one rotor with a rotor axis, in particular a vertical rotor axis or first rotation axis, and at least one blade (8) which is driven in rotation by the rotor (1), in which the blade (8) is attached to a blade holder (11a,11b), which is attached to the rotor so as to be rotatable about a second rotation axis which is situated at a radial distance from the rotor axis.