What pH Does Potting Soil Have

Acid loving plants optimum pH range is 5.0 to 6.0. Potting mix pH is generally slightly higher in acidity (5.3-6.5).

What is the pH of store bought potting soil?

Unless otherwise indicated (like an acid planting mix), the pH of bagged soil or soilless potting mixes will be very close to neutral (7.0) or slightly under.

How do you adjust pH in potting soil?

Sulfur and aluminum sulfate can lower soil pH. To make the pH higher (less acidic), try adding a form of lime, such as finely ground agricultural limestone. The amounts of sulfur, aluminum sulfate or lime should be carefully measured before adding, so check with your local garden center.