Vinegar for lowering soil pH? Anyone do this in landscape / house plants?

Discussion in 'General Industry Discussions' started by Marcos, Jan 15, 2008.

  1. Marcos

    Marcos LawnSite Gold Member
    Posts: 3,720

    I saw on the Dave's Garden site, and some others, about how it's a common practice by some organic-minded folks to lower the pH of soils by adding small amounts of white vinegar into the plant's needed waterings.

    The general consensus that I've seen averages about 2 tablespoons of vinegar per gallon of water, applied within drip line and slightly farther out, and of course, not on the foliage.

    Anyone do this?

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    I've traditionally used organics like cottonseed meal and peat moss for acid-hungry plants like pansy, pink hydrangea, some junipers, boxwood, alberta spruce, dogwood, American redbud, etc...

    But if the area is too wet (clayey) for that, I've gone with spilt-pea sulfur and /or iron sulfate to lower pH instead.
    ( Aluminum sulfate for BLUE hydrangeas.)


    I'm dealing with a range of between 7.3 to 8.0 here... in generally clay-loam soil.

    Any other ideas?
     
  2. ICT Bill

    ICT Bill LawnSite Platinum Member
    Posts: 4,115

    There is a thread on PH in the organic section
    I don't know if it will help or not with house plants. I don't think vinegar is a good choice. What do they use in the west to help acidify alkaline soils?
     
  3. Marcos

    Marcos LawnSite Gold Member
    Posts: 3,720

    Vinegar sounds pretty harsh, granted....but think about the relative concentration.
    2 tablespoons to a gallon = 1 oz vinegar to 127 oz water.
    That's VERY dilute !

    What do they use "out West" in the landscape to acidify the soil?
    You got me.
     
  4. ncls

    ncls LawnSite Senior Member
    Posts: 441

    we use pickling vinegar, 9%, as opposed to 5% regular strength, as a fence line grass killer, and weed killer on organic customers sites. Google for dilution ratios.
     

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