Calla lilies typically bloom from spring through September. If yours are blooming later in the season there may be climatic or microclimatic conditions that have allowed them to bloom later than normal. This is a page about, "Why are my calla lilies blooming in the fall?".
Yellowing dying leaves on your calla lily can be the result of a lack of nutrients or root rot. This is a page about leaves dying on a calla lily.
The beautiful trumpet shaped flowers of the calla lily provide interest in any garden. This page contains photos of calla lilies.
Depending on your zone your calla lilies can either be left in the ground over the winter or will need to be dug up, dried out, and kept indoors. This is a page about overwintering calla lilies.
If planted in a suitable place in your garden your calla lilies will produce more bulbs. They can become overwhelming if not controlled or thinned out.
The pods that develop as your calla lily blooms fade are in fact seed pods. Callas multiply by reseeding and new bulb development. This is a page about growing calla lilies from pods.
Depending on your planting zone you can grow calla lilies outside in the ground or in pots, which help prevent spread. This is a page about planting a calla lily outside.