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Jun 3, 2015 7:08 AM CST
|Here's part of an article from sunset magazine- Sunset sent a batch of Starbucks' used coffee grounds ― the company gives them away for free ― to a soil lab for analysis. Turns out the grounds provide generous amounts of phosphorus, potassium, magnesium, and copper.
They also release nitrogen into the soil as they degrade. And they're slightly acidic ― a boon in the Western climate.
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