I purchased 2 canna plants last year and planted them in large pots on my deck. At the end of the season, I let the frost kill off the growth, and cut them back to soil level. I stored them in the pots in the basement. Several weeks ago my basement was flooded during a week of heavy rain. The cannas soaked up a lot of water in their pots. Soon after, they both began to sprout leaves. Each now have several leaves. Should I leave them in the basement? Should I start watering them? When should I put them outside in the pots? Any advice is much appreciated.