Soil pH or soil reaction is an indication of the acidity or alkalinity of soil and is measured in pH units. The pH scale goes from 0 to 14 with pH 7 as the neutral point. As the amount of hydrogen ions in the soil increases the soil pH decreases thus becoming more acidic. From pH 7 to 0 the soil is increasingly more acidic and from pH 7 to 14 the soil is increasingly more alkaline or basic.
https://www.thespruce.com/how-to-test-soil-acidity-alkalini…
https://www.esf.edu/pubprog/brochure/soilph/soilph.htm
(If still looking to purchase a proper pH kit containing the necessary chemicals and color charts, check your local garden stores)
