1. To make your Calla Lily last as long as possible, try to handle them as little as possible, taking extra care to avoid touching the flower heads.
2. Cut stems 1 inch on a 45-degree angle. Always cut fresh flowers with a Sharp knife, scissors or a dull knife can crush the stem of a flower and reduce the amount of water that can reach the bloom. When you are cutting the stem place the knife on an angle and slice through the stem. This creates a point at the end of the stem, which maximizes the amount of the water that can reach the bloom.
3. Arrange your Calla Lillies in a base with a maximum of 2 inches of water. Mix the package of the flower food with the water.
4. Place the blooms in a cool room in a container or a vase of your choice.
5. To increase the vase life of your Calla Lillies, recut the stems ½ inch, clean the vase and replace its water every three days.
6. Never place your Calla Lily where there might be a warm draft, such as, the top of a refrigerator or beside a heating vent. Fresh flowers last longer when they are a room temperature or lower.