The purpose is to conserve the flowers you have acquired for as long as possible.  Flowers are fragile and need a lot of care.  Just follow a series of basic steps and keep your flowers beautiful and fresh for a long time.

In the box in which you received the flower you will find an envelope of nitrates.  Empty its contents into the water in which you are keeping the flowers.  The nitrates bring nutrients to the water to help conserve your flowers for a longer period of time. 

Cut the stems approximately two centimeters at a slant, if possible.  The end of the stem dries up during transportation and does not correctly absorb the nutrients.  Through this simple operation, your flowers will correctly receive food.

The leaves of the stem should never be kept in the water.  Tear off the lower leaves carefully.

Try to keep the flowers in a fresh spot, far from sources of heat or cold or direct sunlight, heaters, air conditioners and electric appliances.

Try to change the water in the vase approximately every two days or when it is no longer clean.