Covered with a 1/4" of Moo Nure after cutting the crown tendrils down to about a 1/4" and making sure the mound is nice and secure. Then covered with pine straw from the back yard. I have found that covering them with the pine straw not only insulates them a little but also keeps them weed free until they start to emerge in the spring. When it starts warming up and staying that way, the new hop vines will gently break through the moo nure using it as an energy source and appear as small white or off pink nibs. Nugget was transplanted to the trough and Sunbeam got a bigger pot (I'm still coddling that one).