Yes. Clear poly tarps can function as temporary greenhouse walls during freezing winter when the tarp material, thickness, and cold-crack rating match the climate conditions. Most heavy-duty clear tarps transmit 70% to 90% of visible light, provide moderate thermal retention, and protect crops inside a hoop house from wind, snow, and freezing precipitation. Performance depends primarily on whether the tarp uses polyethylene or clear PVC construction and whether temperatures remain above the mate