Naturally acid soil. Most hydrangeas react to the acidity of the soil. Because our soil is so acid I do not do anything special and they are deep blue. The hard part for me is if I want pink. I'd have to use a lot of lime and do it each year.
Determined to have a pink one at least 1 time in my life. I rooted some cuttings and put them in miracle grow potting soil in a half barrel. Beautiful pink blooms! Problem was, it was hard to keep it moist in a pot in the awful heat of our summers.
I gave up.
So thankfully I am happy with blue.
A lot less work for me!
Edited to add Thank you very much!
Determined to have a pink one at least 1 time in my life. I rooted some cuttings and put them in miracle grow potting soil in a half barrel. Beautiful pink blooms! Problem was, it was hard to keep it moist in a pot in the awful heat of our summers.

So thankfully I am happy with blue.
A lot less work for me!

Edited to add Thank you very much!