When the soil's pH is below 7,0
Soil acidity affects a plant's ability to absorb nutrients. Acidic soil has a pH of less than 7.0 -- A soil with a pH of about 7.5 to 6.0 is mildly acidic; 6.0 to 5.0 soils are moderately acidic; and below that, soil is considered highly acidic. Plants growing in acidic soil are less able to absorb nitrogen, phosphorus, and potassium. Areas of heavy rainfall will often have acidic soils. In addition to adding organic material, soil can be made less acidic by liming.
Soils with a pH less than 7.
Acidic soil is referred to any soil having a PH level of less than 7.0 on a PH scale
Soil with a pH value less than 7.0, also called "sour" soil. See pH, pH scale.
Soil with a pH value of less than 7.0.
A soil with a pH below 6.6 as determined by a soil test.
which is soil containing a pH lower than 8.0.
A soil that has a pH below 7, typical of clay soils. Azaleas, camellias, dogwoods and roses like acidic soils; turns hydrangeas blue; most plants like slightly acidic soil.
Soil with a pH of less than 7.0 -- Plants growing in more acidic soils are less able to absorb nitrogen, phosphorus, and potassium. If you have a soil that is high in acidity an easy way to remedy this is to add organic material or lime. This will bring the pH level up and create a more hospitable environment for your plants. Most perennials grow best in soil with a pH of 6-7.