Answer: Coneflowers need all day sunshine. Because yours are in a partially shady spot the stems are reaching for the light, which makes them thin rather than stout and sturdy. Plants in too much shade can also develop diseases. I'd wait until next spring and move the plants to a sunnier spot. In the meantime you can stake up the stems or set a tomato cage over the plant and lift the stems up so they can lean on the cage and stay upright. Good luck with your garden!
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