It's expected that the tops of mint will die back in winter, but the roots are hardy. This means the hack allows the plant to flourish in its regrowth by preventing pests and diseases over the colder ...
you might want to explore obelisk trellises like LeJoy Garden's 6.3 feet metal plant support that retails on Amazon for under $25 or Plow & Hearth's 5 feet powder-coated steel variant that costs ...