Here in San Antonio, it’s not that difficult to keep outdoor worm bins warm. The challenge is keeping them cool in summer.
I’m planning to cover my outdoor flow through with a water heater blanket and then cover that with a tarp. I’m adding a tarp because if fiberglass insulation gets wet, it no longer traps heat.
But before that, I’m going to treat the plywood box with linseed oil because I couldn’t find any carnuba wax. I went to several flooring places and they looked at me like I was a whack job when I asked for carnuba wax. Home Depot and Lowe’s don’t have it either.
Here’s a short video of what’s going on inside the flow through these days. Remember my worm bin is on the north side of the house. Too bad I can’t move it.
Here’s another short video about winterizing worm bins in milder climates. This fellow worm composter is in Texas also, somewhere north of me. She makes several good points about worm bin temperatures and winter feeding.
If you live in a severely cold climate, you might want to bring your worms indoors over the winter.
Any other tips on getting worms through the winter? Add them in the comments below.