Diagnosing Black Spots on Annuals After Storms

After two weeks of rain and wind, black splotches on heliotrope, salvia, coleus, and basil suggest either fungal disease (black spots with fuzzy strands) or drought stress (brown, crispy spots) from wind desiccation.

Take affected leaves in a sealed bag to a local garden center for diagnosis. They can recommend a targeted fungicide if needed. Many plants recover once weather improves. Apply a balanced granular fertilizer (like Espoma Plant-tone) around the base—rain will water it in. Remove severely damaged foliage to improve air circulation.

Ensure containers drain well. Going forward, monitor for recurring issues and treat early.