A regressive suspension spring system for a farm implement including a spring arm, a rocker arm, a wheel arm rotatably coupled to the farm implement at a first end and rotatably coupled to the rocker arm at a second end at a first pivot, one or more dogbone links rotatably coupled to the spring arm at a first end of the one or more dogbone links at a second pivot and rotatably coupled to the rocker arm at a second end of the one or more dogbone links at a third pivot； and a spring disposed between the rocker arm and the spring arm. An attachable farm implement including a regressive suspension spring system, such as a rotary cutter. A powered machine including a regressive suspension spring system.
