how to make potting soil more acidic?

[Worth1]

Originally Posted by PureHarvest

There is some stuff I read that says blueberries, azaleas, and rhodos do not need acid soil. They tolerate it, but don't NEED it.
Rather, if you balance your cations correctly, those plants will thrive, irrespective of where the pH is after you accomplish that balance.
I sense there is some truth to that. To can say that you find blueberries natively in acid soils but that doesn't tell the whole story. What if it is the levels of other stuff in that soil that make them thrive. So you take an unbalanced soil, add sulfur or citric acid to push the pH down, and don't balance everything else. That low pH isn't a miracle worker.

I am going to step in on this one.
Not to disagree but to confirm in a way.
One I grow a lot of agave and cacti some in containers.
I use about the same potting soil I would use for any other plant and they thrive.
I dont make up any cactus mixes.
The only thing I do is I drill more holes up and down the containers for drainage.
The other is my father grew great big sweet blue berries right along side the tomatoes and onions.

Worth