Tag: lava rocks

When I wrote about the cold frame heater I’d just made, I didn’t mention that the other side of this story involves the several hundred thousand red wiggler worms I’ve got living in plastic buckets in the garage. They aren’t squatters. They are there because I built an insulated room for them and now I’d […]

For a couple of years now I’ve fooled around with adding heat to cold frames to extend the growing season in both spring and fall. In a recent DIY project I made a low-wattage electrical heater that heats the soil rather than the air above the soil. In the spring, I might use this unit […]