The life span of a rose bush is usually about 15 years, notes New Mexico State University. If your old rose is declining, it may be best to replace the plant. However, you can take steps to revive your rose if it still has some years left to live.

How long do roses last on the plant?

Blooms will last on average two weeks on the plant. Deadheading or cutting off spent blossoms will allow the plant to grow well and begin its next flowering cycle, depending on the cultivar and time of year.

When should you replace old roses?

The life span of a rose bush is usually about 15 years, notes New Mexico State University. If your old rose is declining, it may be best to replace the plant. However, you can take steps to revive your rose if it still has some years left to live.