Troubleshooting
Wild Senna problems — and how to fix them
Wild Senna (Senna hebecarpa) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Aphid infestations
Yellow oleander aphids (Aphis nerii) cluster on tender stems and seed pods; tolerate low numbers for wildlife benefit or knock off with a strong water jet.
Powdery mildew in late summer
Humid conditions with poor air circulation encourage powdery mildew on foliage; improve spacing and avoid overhead watering to reduce incidence.
Prevent wild senna problems before they start
Most wild senna issues are care-mismatch, not bad luck. Dial in the basics:
Wild Senna problems — FAQ
Why is my wild senna aphid infestations?
Yellow oleander aphids (Aphis nerii) cluster on tender stems and seed pods; tolerate low numbers for wildlife benefit or knock off with a strong water jet.
Why is my wild senna powdery mildew in late summer?
Humid conditions with poor air circulation encourage powdery mildew on foliage; improve spacing and avoid overhead watering to reduce incidence.