Orchards, late frost and the treatment window
The difference between a lost night and a saved one is measured in minutes of warning.
Temperature sensors mounted at canopy level track exactly the layer that matters on spring nights. When the temperature approaches the critical threshold for the current phenological stage, the alert goes out by email, early enough to start the sprinklers, the candles or the fans.
Thresholds are configured per rule with their own severity, so a night that only grazes the limit does not raise the same alarm as one clearly below it.
Outside the frost season, the same sensors feed the record of leaf-wetness hours and sustained high humidity, the intervals in which preventive treatments actually make sense.
