Latt is probably correct. The only thing that might concern me is repeated freezing and thawing of the ground. But honestly, here where I live in Ohio the ground has yet to freeze really solid. Maybe the top half inch of soil, but that's been about it.
I think I remember reading somewhere that as long as the roots are stored at some temp in the low forties for something like 60 days it will meet it's requirements for sending up a top in the spring. (I know these numbers aren't quite right, but somewhere in that ballpark)
Wild plants seem to figure it out just fine on there own. I'm sure it shouldn't be too much of a problem for anything other than newly planted seed which may return to another year of dormancy.