Please Help This Calla Lily Novice
I received a calla lily in a plastic pot for mother's day. It had a beautiful while bloom on it, with nice green leaves. The pot is plastic, about 5" in diameter and there appeared to be 4 separate callas in this pot. I watered it, left it in my house near an east window. It did good for the first week, then I watered it again, and one of the plants literally flopped over.....it appeared to be rotting....really soggy at the base. I cut it off at the base, but the blooms on the other plants died off. Now I see some of the leaves are starting to turn yellow. I really want to keep this plant and get it to grow and produce white blooms, but I need to know what to do. I guess the first thing I need to do is put it into another pot. What size pot? And should I expect to find 1 bulb or more than 1 bulb? Should this plant go outside? How much water, how much sun. I'd appreciate any advice from you experts. Once I find out if I can save this plant, I'll get info on any resting period needed.
Thanks for your help.