This Soil pH Meter provides an accurate reading of the relative acidity and alkalinity of wet garden soil. Easy to use in outdoor beds or indoors with houseplants, this tool will reveal if growing conditions are right, or if you need to adjust the soil for your crops and houseplants. It's key that the soil you are measuring is thoroughly wet, as the meter only offers feedback based on the pH of the water in the soil. If soil is too acidic or too alkaline, plants will not be able to make use of the nutrients in the soil - no matter how fertile the soil is. Understanding the pH of existing soil is helpful for cultivating healthier plants and avoiding some very basic garden problems.