The dark color and insulation may make up for the lack of size, usually unprotected ones are about 3' x 3' so the center keeps warm. If your bin hasn't seemed to be heating itself from within, you can add microbes. (A sample from a friend's healthy compost heap has the perks of being free, something like compost plus would probably work too.)
Composting Project Update: It Froze!
|1/26/11 10:40 PM|