While coneflowers are easy to care for, they aren’t bullet-proof! There are a few reasons why your coneflowers may be wilting:
Not enough water. Though coneflowers are quite drought-tolerant once established, they still need plenty of water their first few months in your garden. Make sure you provide water, especially in the heat of the summer.
Too much shade. If coneflowers are not receiving enough sunlight, they’ll have weak and droopy stems. Make sure your coneflowers are planted in full sun (6+ hours direct sunlight each day) for the strongest stems and best blooms.
Sclerotinia blight. Also known as crown or root rot, Sclerotinia blight is a fungal pathogen that originates from the soil. It usually enters through the damaged tissue in the roots or base of the stem. It’s prevalent in damp conditions, so avoid overwatering your plants.