Aster Plants

Changing Ph of Soil for Stokes Asters

Cindydonahey added on April 9, 2018 | Answered

I have mildly alkali soil. Will using anthracite coal,dust or small coal chunks acidify. What about pine needles? The plants have survived over the,winter, but will probably die out, as situation now stands.

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Certified GKH Gardening Expert
Answered on April 9, 2018

This can help some, but I would recommend using iron sulfate to safely acidify the soil. A soil test will be necessary to know exactly how much you need to lower the pH.

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