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Avatar for Nicole2020
May 22, 2018 8:05 PM CST
Seattle, wa
Hello I have recently planted two different blueberry bushes in my garden. I need to make my soil more acidic as it is not very at the time being. So far I have added peat moss around the bush and into the soil. What other measures can I take to try to get the soil more acidic. I don't want to use any chemicals. Only organic and natural solutions. Any advice?
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May 22, 2018 11:28 PM CST
Name: Daisy I
Reno, Nv (Zone 6b)
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Welcome!

Its been our experience that to grow acid loving plants like blueberries, you have to make about half the soil in the planting hole milled peat. Its really too late after you plant as the acidic soil needs to be in the root zone, not on the soil surface.
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May 23, 2018 4:01 AM CST
Name: Sue
Ontario, Canada (Zone 4b)
Annuals Native Plants and Wildflowers Keeps Horses Dog Lover Daylilies Region: Canadian
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Welcome!

It rather depends on what you consider "chemicals". Typically, but perhaps on a larger scale, elemental sulfur is what is used to lower soil pH (make it more acidic). There are pH lowering sulfur products that are OMRI-listed so acceptable for organic growing.

Canadian peat moss is typically quite acidic but not all peat mosses are equally so, so when using peat moss make sure it is an acidic one.

What is the soil pH now? That makes a difference as to what you'd need to use and how much (and whether lowering it is feasible).

This article below on acidifying soil for blueberries in Washington and Oregon may give you some other ideas:

https://catalog.extension.oreg...
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