What is a soil pH test?
A soil pH test measures the acidity or alkalinity level of soil, which affects nutrient availability and turf health. Results guide decisions about lime application and other soil amendments.
A soil pH test analyzes whether your soil is acidic, neutral, or alkaline on a scale of 0 to 14. The measurement directly affects how well grass roots absorb nutrients like nitrogen, phosphorus, and potassium, even when those nutrients are physically present in the soil. In New England, most turf grasses perform best in soil with a pH between 6.0 and 7.0, slightly acidic to neutral.
Connecticut and regional soils tend to skew acidic due to rainfall and natural mineral composition. When soil pH drops below 6.0, valuable nutrients become locked up and unavailable to grass plants, leading to weak growth, thinning patches, and vulnerability to weeds and disease. A soil pH test reveals this imbalance before visible damage appears.
Based on test results, landscapers often recommend lime (calcium carbonate or dolomitic lime) to raise pH and restore nutrient availability. Conversely, if soil tests alkaline (above 7.5), sulfur or acidifying amendments may be suggested. Many testing labs provide recommendations for application rates tailored to your soil type and target crop. Lawn care professionals in Connecticut routinely order soil tests to build amendment plans that suit site-specific conditions rather than guessing.