Do Pine Trees Acidify Soil

A very common gardening myth is that pine trees and the needles they drop acidify the soil. While it’s true that the soil near pines is often quite acidic, the soil pH was not determined by the tree.

Do pine trees lower the pH of soil?

Pine needles do not lower the pH and acidify the soil. Many things influence soil pH, including climate and rainfall. However mulching materials are not worked into the soil, so whatever effects they may have remains at the surface and do not alter the soil around plant roots.

Do evergreens acidify soil?

Coniferous Evergreen Trees and Shrubs In their native forest habitats, they gain nutrients from naturally occurring plant debris that degrades and enriches the soil over time. These nutrients tend to acidify the soil. Soil pH is measured on a scale from 0.0 to 14.0, where a value of 7.0 is exactly neutral.