Lime in Homemade Potting Soil

esreAugust 1, 2014

I wanted to try making potting soil but am new at this....does it matter what kind of lime is used? I have Sta-Green Rapid-Lime with Soluble Calcium but have seen others recommend Espoma Garden Lime...is there a difference between the two? I just don't want to ruin anything by using the wrong product.
I'd appreciate any suggestions.

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fireduck(10a)

Hi E, The powder form is more available and quicker than the granular. If you have granular...you can put it in the blender and break it down. Dolomite (garden lime) with a calcium/magnesium ratio of 2-1 is perfect. This balances the acidic properties found in peat-based potting mixes.

    Bookmark   August 3, 2014 at 8:30AM
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rhizo_1 (North AL) zone 7

I also recommend dolomitic lime. Do you know how much to use in your mix? Too much is worse than too little.

    Bookmark   August 3, 2014 at 8:43AM
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rhizo_1 (North AL) zone 7

I also recommend dolomitic lime. Do you know how much to use in your mix? Too much is worse than too little.

    Bookmark   August 3, 2014 at 8:57AM
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dbarron(z7_Arkansas)

Oh my goodness, I read the title and thought someone was mixing lime (Citrus ÃÂlatifolia) with potting soil...my bad. Sharing because of the absurdity of it all...

    Bookmark   August 3, 2014 at 9:04AM
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esre

Thanks for your replies. I'm confused whether I can use this lime in a homemade potting soil? I got it from near the grass seed section of the store- the bag says Sta-Green Rapid-Lime with Soluble Calcium.
I read about Al's 5:1:1 mix on the forum and wanted to try making it..I should've mentioned that before...

    Bookmark   August 3, 2014 at 9:36AM
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dbarron(z7_Arkansas)

To add my 1 cent to this convo in a meaningful way. If it's pure lime (read the contents...hopefully they labelled) and not a bunch of other stuff, I'd feel free to mix it in cautiously.

Cautiously because more plants prefer neutral to acidic soil than higher alkalinities.....

    Bookmark   August 3, 2014 at 9:38AM
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calistoga_al

Do you have a goal as far as your PH is concerned? Depending on what you are planting, or just to reach a neutral state? It is easy to check the PH. A test kit for PH is easy to find. Al

    Bookmark   August 3, 2014 at 10:38AM
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esre

dbarron, It looks like it has Calcium 38%, magnesium 0.4%, humic acid 2%, lignin sulfonate 8%, but there are other things on the label I don't even know how to read (minimum ECCE 94.19%, calcium carbonate 95%, etc.).

calistoga, I wanted this soil for some basic house plants because I'm not having luck with the pre-packaged soils (I think they are too heavy and stay too wet); I was just going to follow the recipe exactly and see how they did...

    Bookmark   August 3, 2014 at 11:38AM
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