Q.Calla Lily Struggles
I’ve planted Calla Lilies in large ceramic (with drainage) containers outside. One ivory, one deep purple. The ivory plants have stopped flowering altogether, and the purple have slowed down on flowering and I now have quite a few “flowers” (purple inside, green outside and all drooped). The leaves are lovely and appear to be wonderfully healthy. Please help, I love these flowers and have been successful with growing them, from bulbs, in the ground, but this is my first attempt at larger quantities in containers. Thank you.

These articles should help provide some useful information:
https://www.gardeningknowhow.com/ornamental/bulbs/calla-lily/make-calla-lily-bloom.htm
They are such lovely flowers, I wish you luck ^-^