Profile: Schroth Wholesale Supply Co., Inc. is a wholesale distributor of interior/exterior design accessories and greenhouse supplies. We offer fertilizers, heavy duty thermostats and warming cables. Our heavy duty adjustable thermostat provides automatic temperature control for all types of portable space heaters that operate on electricity. The model 18700 thermostat is used in workshops, garages and farm buildings. The heavy-duty soil warming cables are suitable for both commercial and home greenhouses. The automatic version has a built-in thermostat.