My two cherry trees produce good leaf growth but no blossoms and fruit, why could this be ?

Question

The trees are about four years old. They are aroud seven feet high and are six feet apart.

Answer 1

Were these planted from seed, or was this an established tree already? This can make a big difference. This article can help: https://www.gardeningknowhow.com/edible/fruits/cherry/cherry-tree-not-fruiting.htm