Oak leaves as garden mulch

Asked October 30, 2019, 3:49 PM EDT

Are White Oak leaves too acidic to use as mulch in a Portland garden? I would like to use my mulching mower over the pile of leaves and empty the mower bag around my shrubs. Is this OK? I have Rhodies, Camellias, Azaleas, Laurel, Peris Andromeda, as well as some perennial plants. Thanks for your help.

Washington County Oregon mulch

1 Response

Oak leaves are acidic, but won’t change the soil Ph significantly. Soil in the PNW is generally acidic, and the plants you have listed are well adapted to our soils.
Here is a more complete discussion of oak leaf mulch use, though from Illinois: https://www.extension.iastate.edu/news/yard-and-garden-fallen-leaves