Don't have to be left on the ground to spall. Will spall in the log pile. I have cut standing Hackberry and Maple with lots of green leaves and find spalling. When a tree is cut with the sap up and temps high it will start to blue/spoil pretty quick. If you want to check if yer smeller is workin' Put a big wet and blued (and SOURED) Cottonwood on the carriage in the hot summer. After the blade (circle mill)is into the first and second cuts take yourself a BIGG ole whiff . Yer sense of smell will definitely be WOKE ..
A real problem when the tree is cut with the sap up and warm temperature is they spoil and blue streaks appear. I have cut Hackberry and Maple with green leaves and find spalling.
