My white Calla I have had since 2008! It used to have HUGE leaves when I had it first. It was forgotten dormant in the loft and I found it when I moved 4 years later! Zantedeschias are a very good plant to have as a beginner I believe, because no matter which plants have crossed paths with me, they have survived it all. I love how they get rid of excess water at the tip of the leaves, one of my most favorite plant tricks. Looks beautiful if the light catches them doing it too.
I need to buy some sand, they did best in my care with sand in the soil.