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New to growing your own tomatoes? This is the forum to learn the successful techniques used by seasoned tomato growers. Questions are welcome, too.

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Old April 8, 2012   #1
Lorri D
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Default Making soiless medium & lime ?

I keep reading about adding lime to peat to balance the natural acidic nature of the peat. Can you use agricultural limestone as the "lime" ingredient? I have found there are lots of types of lime and I don't really understand their pro's and cons or which is best for this purpose. Thank you so much!
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Old April 8, 2012   #2
willyb
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You can use agricultural limestone in your containers it will do the job. I use agricultural limestone in my garden as it has a slow release. (over a few years) I use dolomitic lime in containers as it has magnesium in addition to calcium. I believe this to be good for tomatoes and aids in the prevention of BER. Dolomite is also quicker release.
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Old April 9, 2012   #3
fortyonenorth
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Yes, both ag lime and dolomitic lime will neutralize soil acidity. As Willy pointed out, for container culture, many prefer dolomitic lime because it provides both calcium and magnesium, which are both used by plants in relatively large amounts. If you already have ag lime on hand, you can use that for pH adjustment and calcium and then add some epsom salts (magnesium sulfate) as your Mg source. It's cheap and readily available at any drug store.
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Old April 9, 2012   #4
Lorri D
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Excellent info! Thank you to you both very much : )
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