Even so, Pennsylvania farms produce between 400 million and 500 million pounds of apples each year, according to the Pennsylvania Department of Agriculture, making it fourth in the nation for apple production. A lot of Western Pennsylvania fruit tree farms are rain-fed.”In addition to the weather, shifting political winds have also bred some uncertainty. In July, the vast majority of apple exports from the U.S. went to Mexico and Canada. “That is what the apple industry has been battling for several years.”Pennsylvania is fifth in the country when it comes to apple exports, according to industry group U.S. Apple. Those two countries alone are responsible for around half of total fresh apple exports, worth nearly half a billion dollars annually.”