Answer:
I plow and plow but never sow.
Though it be cold, I wear no clothes. The frost and snow I never fear. I value neither shoes nor hose and yet I wander far and near. What am I?
I make you weak at the worst of all times. I keep you safe, I keep you fine. I make your hands sweat and your heart grow cold. I visit the weak, but seldom the bold. What am I?
Without a bridle, or a saddle, across a thing I ride a-straddle. And those I ride, by help of me, though almost blind, are made to see. What am I?
I am flora, not fauna. I am foliage, not trees. I am shrubbery, not grass. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.