Cutting flower stems underwater adds life to the bloom!
The stem of a flower is the lifeline to a bloom. In humans, oxygen is needed for survival. In flowers, water is the sustenance. Water flowing through the stem is like blood in the veins of humans. When a stem is cut, the flow is interrupted. This can be reopened by cutting the flower stem underwater.
When a flower is cut, it is deprived of water. Imagine holding your breath underwater. When one comes up for air, there is a gasp to fill the lungs. Flowers also create a suction that quickly fills the stem. By cutting the stems underwater, the stems are filled with rejuvenating water-not air. Air bubbles in the stem of the flower decreases the longevity of the flower bloom.
After cutting the stem underwater, a vacuum is created that holds a water droplet on the end of the stem. This vacuum allows more water to race up to the bloom when the stem is placed in a bucket of warm water with floral preservative added. This can also revitalize a bloom that is deprived of water.