Keep your worm bin humming through the winter!

This seed starting mat is perfectly sized for the Urban Worm Bag and will apply a low-level heat to the surface of your vermicompost. Place the thermostat probe just underneath the surface of your vermicompost and set the thermostat to 72°F for the best results. This product should not dry out the surface of your vermicompost!

It's got the stamp of approval from Steve and the Urban Worm Company.