My large Thai pot cracked during the terrible freeze this winter so I had to take out the lotus and replant it. I put pond liner in the pot but the lotus never did well. It sent up several leaves that quickly died. Today, I salvaged the tubers as I suspected they were rotting. Some were dead, others were intact. The ones that are pink/tan have roots on the end but no growth tips. Is this a lost cause? Can I rehabilitate the tubers? Zone 7b - Atlanta