Tip #1:

Replenish the water frequently. Change the water entirely every 2-3 days.

Tip #2:

Trim at least a half inch of stem off your flowers before you put them in a vase and each time you change the water.

Tip #3:

Keep your flowers away from heat and bright light.

Tip #4:

Avoid sitting your flowers beside ripening fruit or vegetables, especially bananas and apples.