The ‘K146-43’ rootstock is an inter-specific hybrid rootstock, useful primarily as a commercial understock for peach and nectarine cultivars. The stock has been successfully propagated clonally by hardwood cuttings. This rootstock imparts a substantial degree of vigor control to the scion cultivar that is propagated on top of it. The utilization of adapted growth controlling rootstocks in commercial orchard situations reduces the height of the individual orchard tree without compromising the quality of the fruit. This in turn increases the efficiency of various cultural operations such as pruning, thinning and harvesting by reducing the need for workers in the field to use tall ladders when carrying out these operations.