This soil tester makes growing plants a very easy task. It is a three in one plant moisture, light checker and ph tester for all gardening needs. It works outside in the garden or inside for all you potted plants in the house. It is great to be able to test the soil before you start planting a garden as well. It helps keep track of when the plant needs to be watered. It is super easy to use and works in all types of soil.