It comes every year. Plus, it's more time for stuff (bugs, rodents, etc) to get into it and be a nuisance. And, as at least one other comment has said, if you c

It comes every year. Plus, it's more time for stuff (bugs, rodents, etc) to get into it and be a nuisance. And, as at least one other comment has said, if you chop it in the winter, it warms you twice :P