Will a late freeze in spring affect my apple crop?
A late freeze in spring may damage the blossoms or developing fruit on apples, cherries, and other fruit trees. As a result, the fruit crop may be smaller than normal. The extent of damage will be determined by the plant species, stage of flower/fruit development, and temperature. At petal drop on apples, a temperature of 28 degrees Fahrenheit will kill approximately 10 percent of the developing fruit while a temperature of 25 degrees will kill approximately 90 percent of the developing fruit.