When my N. ventricosa arrived, it was damaged by frost. I trimmed off the dead leaves and the damaged growth tip. It has been over two weeks now and I have noticed absolutely ZERO growth on the plant. In fact, two of the surviving leaves are getting more and more brown every day. One of the remaining pitchers is also fading fast. Since this is my first nep, I don't know what to expect when it comes to resiliency. Should I just start over and hope that the postman keeps this one a little warmer? When do I know to "call it quits" on a nep?