Buy the 2015 Old Farmer's Almanac!
Reporting
Just go ahead and cut them upJust go ahead and cut them up for planting. leave a couple of inches of the sprout sticking out of the soil. They will do fine. Protect them from frost with an old sheet if it gets cold.

2015 Special Edition Garden GuideCooking Fresh with The Old Farmer's AlmanacThe Almanac Monthly Digital MagazineWhat the heck is a Garden Hod?