A few years ago I planted an apple tree. Two years ago I got only two apples to grow but they fell off when they were very small. Last year I was very excited to have about thirty or forty apples growing, but we got a pretty good storm and it knocked all off, except two which grew to maturity. The storm was not that bad so I'm concerned there may be another reason for the apples falling off. Do you think there could be?
There can be several reason for premature fruit to drop.
Here are several articles to help you.