How long do irises last?

I'm curious to know, how long do irises typically last? Are they known to have a long shelf life, or do they wither away quickly? Are there any specific factors that can impact their longevity, such as the environment they're grown in or the care they receive? Understanding the lifespan of irises would be helpful in determining the best way to cultivate and maintain them. Can you provide any insight into this matter?