Pear trees no blossom last two years why?

three pear trees one late and two early, two years ago all three trees had beautiful full blossoms absolutely gorgous! That same year all three trees had lots of fruit. Last year and again this year it doesn't seem to have any blossoms at all. What has happened to my pear trees????

Please help
Pear trees no blossom last two years why?
Overfertilizing with nitrogen, a lack of sun or improper pruning may cause a lack of blooming.
Reply:A pear and apple tree will rest a year if you work it to hard. If you thin the crop so it isn't under such stress you can help stop it from wanting it to rest.

A peach tree will not do this rest a year thing.
Reply:They are very prone to frost %26amp; freeze. If you had an early freeze in the late fall or a late frost this spring, that'll do it. They are especially prone to temp. extremes if they are hybrids. Also may be possible that deer have eaten the buds?