How Do You Get a Hydrangea to Bloom Every Year?

Question

I have five hydrangeas in my yard. One I recently purchased, Oak leaf. Another I dug up from a house that was about to be bulldozed down and two smaller ones that I have had for many years. The rescued hydrangea is big and blooms without any help from me. The oak leaf, even though it is still small, blooms very well. But the other three have maybe one bloom, if any. They are on the northeast and northwest corners of my home. What am I doing wrong?

Answer 1

This article will help:
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-not-blooming.htm