What Are the Chill Requirements of Apple Trees?

The required number of chill hours--the number of hours a climate experiences a temperature of 45 degrees F, or lower--is especially high for apple trees. Traditional varieties require between 800 to 1000 chill hours. However, some varieties can be grown with as few as 250 chill hours.

Keywords: chill hours, growing apples, apple requirements

About this Author

Melissa Jordan-Reilly has been a writer for 20 years, both as a newspaper reporter and as an editor of nonprofit newsletters. Among the publications in which she has published are, "The Winsted Journal," "Taconic" and "Compass Magazine." A graduate of the University of Connecticut, Jordan-Reilly also pursues sustainable agriculture techniques and tends a market garden at her Northwestern Connecticut home.