What should I use to lower the pH of soil for blueberries - diluted white vinegar or sulphur

rb50, by email

A BOB SAYS Neither. Although either might work in pots, where ingress from surrounding soil is not replenishing the pH. Even replacing some soil with acid compost will still give only temporary relief, unless you line the site and/or raise a mound. The simple answer is large containers filled with good ericaceous compost.