WHY TEST SOIL pH? Correct soil pH is essential to ensure optimal plant growth and crop yield, because it allows nutrients to be freely available for plants to take in. Testing the pH of your soil helps to determine what plants are best suited for that area. DON'T WAIST MONEY: Soil testing is arguably the single most important step that a gardener or grower can perform to ensure bountiful yields. Without knowing the pH or current nutrient levels of your growing space, you can easily waste hundreds of dollars on amendments that won’t benefit your soil or crops because they can’t use them effectively. FAST AND EASY TO READ RESULTS: Mix the soil sample with water and let the solution sit for 30 minutes before testing. Dip one strip into solution for 3 seconds and remove the strip, then hold the strip horizontally for 60 seconds. Compare against the color chart on the bottle immediately for accurate results. USE ON ALL YOUR PLANTS: Soil PH test strips suitable for outdoor indoor plants gardens grass lawns patio fruit trees flowers vegetables forest shrubs. ACCURATE RESULTS: The measurement range of soil test strips for garden is pH3.5-9,accurate results can help you determine the ph of the soil.