https://www.housedigest.com/1870755/what-flowers-shouldnt-deadhead-plant/
Certain flowers like coneflowers, ornamental onions, love-in-a-mist, and sedum are better to avoid deadheading at the end of their blooming season.
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https://www.gardeningknowhow.com/ornamental/flowers/coneflower/should-you-deadhead-coneflowers.htm
Also known as purple coneflower, Echinacea has grown wildly and contently for hundreds of years without any maintenance. When I suggest coneflowers to a...
echinacea plantsdeadheadinglearnconeflowersgardening