What's the proper care of root bound Calla Lily?
Root Bound Calla Lily
Certified GKH Gardening Expert
This may be a good time to divide your Calla Lily or simply increase the pot size and give your plant more room to grow.
Use good quality potting mix and a container with a good drainage hole. Only go up 1 to 2" larger in size on the pot.
Here are a few links for you.