Soil pH is a measurement of the acidity and alkalinity within the soil. The measurement taken for a certain planting site location is important for gardeners to determine and select which plant species can be used to plant in said soil.

0 – 3.9 pH = Very strong acid
4.0 – 4.9 pH = Strongly acid
5.0 – 5.9 pH = Moderately acid
6.0 – 6.9 pH = Slightly acid
7.0 pH = Neutral
7.1 – 7.9 pH = Slightly alkaline
8.0 – 8.9 pH = Strongly alkaline
9.0 – 10 pH = Very strong alkaline