Why Do Plants Green Up After a Thunderstorm but Not After Watering with a Hose?
Storm rain carries nitrate and ammonium formed by lightning — arriving at pH 5.6, versus tap water’s 7.5–8. The sky has been running a fertilizer operation the whole time. Lightning converts atmospheric nitrogen into plant-available nitrate and ammonium, which then fall with raindrops directly into the root zone. That chemistry is what separates a thunderstorm … Read more