[ptah]

have you tried putting the worm bins directly into the soil with the bottom cut out? It is a permaculture technique and i believe the soil keeps temperature relatively stable. I am in scotland and it never gets below -4 degrees celsius or above 25.

something like this https://www.youtube.com/watch?v=1pEq2QkBG4U

[BiteCode_dev]

In this case, no need for worms.

[ip26]

The "wild" worms are the wrong type for this job.

[BiteCode_dev]

No need for any worms. Just stack stuff on the soil.

There is nothing else to do, it works by itself.