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Using Pine needles to lower soil PH #872729

Asked June 12, 2024, 12:08 AM EDT

I have recently heard that the University of Minnesota Master Gardener module on fruit is recommending the use of Pine needles to reduce soil PH. That is very outdated information. University studies show that Pine needles are only slightly acidic and they do not significantly lower soil PH.. https://blog-fruit-vegetable-ipm.extension.umn.edu/2021/10/does-your-soil-have-high-ph-fall-is.html

Ramsey County Minnesota

Expert Response

The Master Gardeners I know and the research material I am familiar with is in agreement with your link.  As far as I know, that is what we tell the public and is certainly what I've always told the public: pine needles, while making a fine mulch, are not a soil acidifier.

So I am puzzled by your first sentence.  Perhaps you can clarify your statement by giving more specifics?
Dennis in St. Louis Park Replied June 12, 2024, 2:29 PM EDT
Dennis;

I have a friend from Morrison County who is currently in the Master Gardener program.
She says they are being told to use pine needles to lower soil ph for blueberries.
I think most experienced gardeners would agree that is a garden myth.

Jeffery Thole

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On 6/12/2024 1:29 PM, Ask Extension wrote:
The Question Asker Replied June 12, 2024, 7:10 PM EDT
We strive to give information that is consistent, accurate and based on current science. So we find this information that you've given us disconcerting.  If you could please give us the name of the Master Gardener who told you this, plus any additional information, such as their source for the information.  Send this, along with something identifying this thread, such as the question number: #0142647, to <personal data hidden>.  This avoids "publishing" personal information on a public forum.
Dennis in St. Louis Park Replied June 13, 2024, 2:32 PM EDT

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