This is the first year I've had such a variety of wood species, and the knowledge to know what kind of wood to burn at what time. When I packed the woodshed this year I set it up to start with cotton wood and black walnut. It burned great and heated the house well without overheating when temps were in the low forties/thirties. I'm just finishing that up and now moving into hard maple, cherry and ash right as the temps are moving into the twenties. Have about two cords (hopefully enough) of white oak for the very cold. Behind that I have ash, cherry, then a little more cottonwood to burn in April / May. For once, things are moving along as planned.