What does soil pH measure, and why is it important for trees?

Soil pH measures the acidity or alkalinity of the soil, which is crucial for trees as it significantly affects nutrient availability. Each nutrient required for tree growth has an optimal pH range within which it is most available to plants. For instance, certain essential nutrients like nitrogen, phosphorus, and potassium become less available when the soil becomes too acidic or too alkaline. A balanced pH level, generally around 6.0 to 7.5 for many trees, ensures that these nutrients are accessible, promoting healthy growth and development.

In addition, the pH can influence microbial activity in the soil, which is vital for decomposing organic matter and cycling nutrients. When the pH is within the ideal range, beneficial soil microbes thrive, enhancing nutrient uptake by trees. Therefore, understanding and managing soil pH is fundamental for successful tree health and growth management.