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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.