- Chill Hours are the minimum amount of chill required for the flower buds to break dormancy and to set fruit.
- Chill hours occur between 32 and 45 degrees.
- Chilling requirement is the total accumulating number of hours during the winter.
- Each variety of fruit tree, bush and strawberry have a different requirement of needed chill hours
Southern varieties of fruit plants tend to need a lower number of chill hours than northern varieties.