Coneflowers

Question

I have had coneflowers in my garden for 10+ years. This summer however, they did not grow. What is the life cycle of a coneflower plant?

Answer 1

There can be many reasons for the die off of perennials from environmental, disease and pests.

https://www.gardeningknowhow.com/ornamental/flowers/coneflower/growing-purple-coneflowers.htm