Q.Something Is Eating My Coneflower
I cannot see any bugs, but something eat off the stem in 10 minutes. Now all the new growth stems have been eaten.
Certified GKH Gardening Expert
It could be a number of things that have done this, unfortunately. I could recommend, either, Neem oil or Azadirachtin. This comes from Neem oil. They will keep insects from your garden, naturally.
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/azadirachtin-vs-neem-oil.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
This collection of articles will help you with the care of your Echinacea:
https://www.gardeningknowhow.com/ornamental/flowers/coneflower