Troubleshooting
Guatemalan Blue Sage problems — and how to fix them
Guatemalan Blue Sage (Salvia cacaliifolia) 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.
Powdery mildew
Common in humid but poorly ventilated conditions; keep air moving around the plant, avoid wetting foliage when watering, and apply a copper-based fungicide if the infection spreads.
Verticillium wilt
Causes progressive yellowing and wilting of stems with no cure; remove affected plants promptly and do not replant salvias in the same soil.
Aphids
Congregate on soft growing tips and flower buds; dislodge with a strong water jet or treat with insecticidal soap; beneficial predators such as ladybirds give good biological control.
Prevent guatemalan blue sage problems before they start
Most guatemalan blue sage issues are care-mismatch, not bad luck. Dial in the basics:
Guatemalan Blue Sage problems — FAQ
Why is my guatemalan blue sage powdery mildew?
Common in humid but poorly ventilated conditions; keep air moving around the plant, avoid wetting foliage when watering, and apply a copper-based fungicide if the infection spreads.
Why is my guatemalan blue sage verticillium wilt?
Causes progressive yellowing and wilting of stems with no cure; remove affected plants promptly and do not replant salvias in the same soil.
Why is my guatemalan blue sage aphids?
Congregate on soft growing tips and flower buds; dislodge with a strong water jet or treat with insecticidal soap; beneficial predators such as ladybirds give good biological control.