Planted tulips can last for many years. They need to be cared for year round to prolong their life. However, once they are cut they will not last very long. Changing their water everyday will make them last longer.
1 Additional Answer
Tulips don't last very long, usually just a few weeks in the spring. The good news is that if they are planted outside, they will come up every spring. You can find more info at: www.ext.nodak.edu