A walk-behind cultivator has a body, at least one pair of first tine assemblies mounted on the body to undergo rotation about a rotational axis in a first direction of rotation, and at least one pair of second tine assemblies mounted to undergo rotation about the rotational axis in a second direction of rotation different from the first direction of rotation. Each of the first tine assemblies has first tines connected together along end portions thereof. Each of the second tine assemblies has second tines connected together along end portions thereof. The second tine assemblies are arranged in the same phase with respect to each other around the rotational axis.