Leave some foliage/bud on her, up can her ,trim back the roots, put her in a small pot where she can grow out more roots and put her under 24hrs of light. I heard 18 hrs of light will work too. I like to use 1 ml superthrive plus a heavy dose of seaweed or mild veg solution per gallon of water for the first watering. You should see some new weird foliage growing in a week or two. Crop early because new growth during reveg tend to stretch in my experience.