Get Free Coffee Grounds from Starbucks

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compost

Here’s some information on using coffee grounds in your compost from Starbucks. Besides getting spent grounds from Starbucks, I’m sure any of your local coffee shops would be happy to hand some over. You can divert great organic matter from going to a landfill and improve your garden at the same time.

Coffee grounds can provide a valuable source of nutrition for your garden. The proper amount to be used depends on the condition of your soil and what you are growing. Check with a local gardening expert or your local parks to see what is best for your garden. Here are a few general tips:Applying coffee grinds directly to your garden:
Coffee grounds can be applied directly as a top dressing to acid loving plants like blueberries, hydrangeas, and azaleas (acid loving plants thrive in areas where rainfall is common in the warm season). Adding brown material such as leaves and dried grass to the mulch will help keep a balanced soil pH.

Mixing coffee grounds in your compost:
Coffee grounds act as a green material with a carbon-nitrogen (C-N) ratio of 20-1. Combined with browns such as leaves and straw, coffee grounds generate heat and will speed up the compost process. Don’t make your coffee grounds more than 25% of any one pile’s content. To counter the acidity of the coffee grounds, consider adding 1 teaspoon of lime or wood ash for every 5 pounds of coffee grounds in your pile.

Using coffee grounds in your worm bin:
Worms fed with coffee grounds and other vegetarian materials will flourish.

What’s in Coffee Grounds?
Starbucks commissioned a study in 1995 to better understand the make up of the organic matter we call coffee grounds. The following is the result of the analysis performed by the University of Washington, College of Forest Resources:

Primary Nutrients

Nitrogen……….1.45%

Phosphorus……ND ug/g

Potassium…….1204 ug/g

Secondary Nutrients

Calcium……….389 ug/g

Magnesium……448 ug/g

Sulfur…………high ug/g

ND = indicates sample is below detection limit

ug/g = microgram/gram
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