Troubleshooting
Tennessee Coneflower problems — and how to fix them
Tennessee Coneflower (Echinacea tennesseensis) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Aster yellows
Leafhopper-spread phytoplasma causes green, deformed flowers; there is no cure, so remove and destroy affected plants promptly.
Root rot in wet soil
Heavy, poorly drained ground rots the crown; plant in lean, sharply drained soil and avoid overwatering.
Powdery mildew and leaf spot
Humid, crowded conditions favour fungal leaf disease; space plants for airflow and avoid wetting foliage.
Short-lived clumps
Like many coneflowers it can be short-lived; let some seed heads stand to allow self-sowing, or divide periodically.
Prevent tennessee coneflower problems before they start
Most tennessee coneflower issues are care-mismatch, not bad luck. Dial in the basics:
Looking for tennessee coneflower in general rather than its problems? Read the full tennessee coneflower care guide — light, water, soil and feeding.
Tennessee Coneflower problems — FAQ
Why is my tennessee coneflower aster yellows?
Leafhopper-spread phytoplasma causes green, deformed flowers; there is no cure, so remove and destroy affected plants promptly.
Why is my tennessee coneflower root rot in wet soil?
Heavy, poorly drained ground rots the crown; plant in lean, sharply drained soil and avoid overwatering.
Why is my tennessee coneflower powdery mildew and leaf spot?
Humid, crowded conditions favour fungal leaf disease; space plants for airflow and avoid wetting foliage.
Why is my tennessee coneflower short-lived clumps?
Like many coneflowers it can be short-lived; let some seed heads stand to allow self-sowing, or divide periodically.