Troubleshooting
False Indigo Bush problems — and how to fix them
False Indigo Bush (Amorpha fruticosa) 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.
Suckering and invasive spread
In moist, fertile soils the plant spreads aggressively by root suckers and seeds and is considered invasive in parts of Europe and some US states outside its native range; remove suckers promptly and deadhead if naturalising is not desired.
Powdery mildew and foliar diseases
Dense foliage in humid conditions encourages powdery mildew; improve air circulation by pruning out the interior of older stems in late winter. Aphid colonies can coat new shoot tips in spring — a strong jet of water or insecticidal soap resolves most infestations.
Prevent false indigo bush problems before they start
Most false indigo bush issues are care-mismatch, not bad luck. Dial in the basics:
False Indigo Bush problems — FAQ
Why is my false indigo bush suckering and invasive spread?
In moist, fertile soils the plant spreads aggressively by root suckers and seeds and is considered invasive in parts of Europe and some US states outside its native range; remove suckers promptly and deadhead if naturalising is not desired.
Why is my false indigo bush powdery mildew and foliar diseases?
Dense foliage in humid conditions encourages powdery mildew; improve air circulation by pruning out the interior of older stems in late winter. Aphid colonies can coat new shoot tips in spring — a strong jet of water or insecticidal soap resolves most infestations.