After a week I take the flowers out of the vase, the flowers no longer good I throw away. The remaining flowers I make a nice new arrangement again and they are like new.
Flowers that wilt quickly one can pep up again by taking an aspirin into the vase.
You have more fun of a vase of flowers if you do a few drops of camphor in the water.
If the flowers seems almost finished then pour some lemon spa at (or possibly some lemon juice with red spa) and they make sure to have a few days all they) incredible what a result.