Pine needles don’t acidify soil | Property & Back garden

Q • I experienced a soil take a look at accomplished not long ago, and I was stunned to see that my soil was not acidic even however I mulch the area seriously with needles from my pine tree. Why aren’t pine needles doing the job for my soil?

A • It is a pervasive myth that pine needles or oak leaves can acidify the soil. Even though contemporary, green needles are acidic, they are rapidly neutralized as they brown and thus do not have the capability to acidify soil.

Soil pH has every thing to do with the regional geology of the area and is not substantially afflicted by fallen leaf content. In this article in St. Louis, we have a good deal of limestone in the soil that offers us a better pH, though parts with sandstone would be extra acidic.

Pure stands of pines are found developing in acidic soil for the reason that that is what they demand for progress, not mainly because their needles acidified the soil. On the other hand, pine needles and other leaves are still superb for use as an organic and natural mulch. If your soil pH is superior and you require to decreased it, use elemental sulfur, at times bought as “Soil Sulfur.” Be absolutely sure to abide by pointers from a soil check via your nearby county extension business office, readily available here: extension.missouri.edu/packages/soil-and-plant-screening-laboratory

Publish to the Missouri Botanical Garden’s Middle for Residence Gardening at [email protected] or the Horticulture Reply Support, 4344 Shaw Blvd., St. Louis, MO 63110.