Question
My cala lilly leaves are turning yellow and falling off.  Should it be re-potted in a larger container?

Answer
Hi Kathleen,
Thanx for your question.  Most likely, the plant is going dormant.  Slow down watering and do not feed.  Allow the plant to "rest" for 3 months in a cool, dark, dry place, watering once a week to keep the soil from drying out completely.  After three months, bring the plant back into a warm window sill and water.  It should start coming back up for another blooming period.  I hope this helps.
Tom