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Q&A Can't find your topic?

Pine Needles Ė Excessive Acidity
Q: After reading your answer to the question about leaving pine needles on the lawn last week, Iím still confused. I understand about not letting them make a mat on the grass but what about the acidity they produce?
A: Youíre confusing causation with association. Itís a common misconception that pine needles excessively acidify the soil. Because pine trees can tolerate poor growing conditions, folks assume that their needles made the soil bad in the first place. Iíve known gardeners who fear that using pine straw as mulch under shrubs and trees will make the soil too acid. Neither pine trees nor pine straw make soil unduly acid. Itís true that decomposing leaves from any tree naturally release a small amount of organic acid. But soil chemistry is such that their effect on soil pH is not noticeable except over many, many years.
 

 



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Trim back by one fourth any woody plants youíve kept outdoors during the summer, to help them fit inside your home for the winter.

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