You’ll want to amend the soil to be more acidic (lower pH), not higher. A pH in the 4.5-5.5 range should work. I’d hate to know someone’s out there adding lime around their blueberries.
I know that you don’t add lime, but otherwise, what is the best stuff to add to your soil to lower the pH?
Did I give the wrong advice?
No lime! Sulfur or Aluminum sulfate...but some people balk at adding ‘aluminum anything’ to the soil where food crops are concerned; supposedly there’s a link between aluminum and early onset Alzheimer’s.
But I forget... ;)