After heavy road deicing, what’s your go-to protocol for mitigating chloride injury to street trees—gypsum flushing, soil amendments, spring deep watering, or something else? Can you share one timing or application tip that has made a measurable difference in your experience?

From an arborist's perspective, the most practical response is usually a combination of deep watering and soil improvement. Deep watering helps dilute and move salts out of the root zone, which is often the main driver of stress after winter de-icing. Soil amendments don't remove salt on their own, but they can improve soil structure, drainage, and root function, which helps trees recover once the immediate salt load is reduced. In urban planting strips and compacted soils, improving infiltration can make flushing more effective over time. This approach focuses on restoring soil conditions that support long-term tree health.