1. Cut off the stems at an angle (better if under water).
   
2. Change the water daily or every other day.
   
3. Water must be at room temperature or slightly warmer.
   
4. Every time you change the water add flower  food or a teaspoon of sugar.
5. Avoid direct sunlight and ethylene gas. Ripening fruits and vegetable give off ethylene.
   
6. Try keeping flowers in a cool area.
7. Avoid leaves touching water - this creates more bacteria.

For  Roses:  Add some lemon drops into the water or a little salt. For bacteria to be destroyed, add a drop of a disinfecting substance into the water.

For Tulips: The tulip doesn't bear water privation and warmth. They prefer cold water. You can also put a metal coin in the water. Remember that tulips keep growing even if they are cut, so expect that they would be taller in a few days and stems would turn towards the light.

For Lilies: Add a spoon of white vinegar in the water (applies to the gladiolus as well as anemones). Adding vinegar prolongs the flower's life.

For Chrysanthemum: You need to change the water frequently and spray it onto the flowers. Chrysanthemums like humidity.

For Orchid: This exotic flower prefers a temperature of 26 degrees. After gathering, the flowers have to be left in a cold space (10-15 degrees) for a couple of hours. After that put the flowers in water. To refresh orchids you should cut the stems and then put them in boiled water.