This model predicts the lethal temperature of sweet cherry floral primordia (triple lines). When the ambient air temperature (blue line) falls below the freezing temperature of buds (about 25 °C), the floral primordia acclimate to lower lethal temperatures. When the ambient air is above freezing, floral primordia deaaclimate to a warmer base value. This base value will begin to rise as floral buds awaken.

The blue squares with error bars are experimentally determined values using differential thermal analysis (DTA).

This model can be calculated with data from any nearby weather station.