When oak leaves first fall off the trees, they have an acidic pH in the range of 4.5 to 5.5 depending on the type of oak tree they came from. ... The net effect is that the oak leaves would not acidify the soil in the long run. Leaves are actually a good thing to work into your soil.

Do oak leaves make the soil acidic?

Are Oak Leaves Acidic? ... When oak leaves are fresh, they possess a pH level of around 4.5 to 4.7, making them acidic. However, as they break down, they get much closer to neutral. The bottom line is that multiple studies have shown that oak leaves (even in large quantities) have no effect on the acidity of soil.

Are oak leaves good for soil?

The fallen leaves are a boon to landscapers and gardeners; oak leaves make great mulch. ... They are clean, break down easily, and provide all the benefits of organic mulches; they moderate soil temperatures, suppress weeds, conserve moisture, and add nutrients to the soil as they decompose.