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.
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.