Experts and BHG readers answer.
Yellow and browning leaves
Thanks for writing. Without being able to see your columbine in person, I can't say for sure what the problem is. If they're the oldest leaves, it may simply be old age. Or the yellowing could be a sign that the columbine is suffering from soil that's too wet or too dry -- or if from any other sort of root damage.
Also: Columbines are typically short-lived plants; each plant lives two or three years and after that it goes away. But if you let your columbines produce seed, you should always have a supply of fresh, strong plants.
---Justin, Senior Garden Editor, BHG.com