The sooner that you put your flowers into water, the longer they will last.
The flowers should be re-cut at the stems while submerged in water. This is important for hollow-stemmed flowers so it will prevent an airlock from forming in the stem which may prevent the flowers from taking water.
The stems should be cut on an angle, which will create a wider exposed area and allow the flowers to take the maximum amount of water.
Flowers will last longer if the plant food is added to the water. An example to an alternative to plant food would be sugar.
