Garden Q&A: Why hasn't my bergenia flowered in 10 years?

Whether you're a gardening beginner or expert, Irish Examiner columnist Peter Dowdall has the answer to your questions   

Bergenia is an evergreen perennial with rounded leaves and bell-shaped pink, or sometimes white, flowers in springtime. File picture

Question

I have two very healthy bergenias, both with beautiful glossy leaves. Unfortunately, only one of them has flowered in 10 years. What is happening to them?