Outside Uses
16 Creative Ways to Use Old Coffee Grounds
Finally, once coffee grounds have been used and reused, they can be added to a compost pile. Grounds can be added to a compost pile without too much concern about how they'll affect the pile, for the organisms and worms that compost other foods generally are also happy to process coffee grounds.
Fresh Coffee Grounds for Acid-Loving Plants
Your acid-loving plants like hydrangeas, rhododendrons, azaleas, lily of the valley, blueberries, carrots, and radishes can get a boost from fresh grounds.
Once the filter is in place:
Starbucks started its Grounds for Your Garden program in 1995, which is offered on a first-come, first-served basis in participating stores where local codes permit. Even the packaging has been reused – baristas scoop spent coffee grounds into the empty bags originally used to ship espresso beans to stores.
The nutrients in coffee grounds are slowly broken down, allowing the turf to have a longer period of time to absorb them ensuring stronger turf for longer. Using coffee grounds as lawn fertilizer is also good for the worms. They love coffee almost as much as we do.
In addition, it is also important that the grounds are never used more than two times, max. Not only does the coffee taste absolutely bad, but you'll also be wasting water at that point, so there's really no point trying to push things this far.
Used or spent coffee grounds still contain a significant amount of caffeine. A study conducted by The Department of Nutrition, Food Science and Physiology, School of Pharmacy, University of Navarra found that spent coffee grounds contained 3.59 to 8.09 milligrams of caffeine per gram of used coffee grounds.
Coffee Grounds
The oils in the coffee begin to evaporate at a quicker rate, On average, an unsealed bag of ground coffee should last about 3-5 months past the expiration date. When opened, it should be expected to last 3-5 months in the pantry.
Although coffee grounds do not kill ants, they do repel many ant species. If you feel ants are a major threat to pets, plants and people, hot coffee dumped directly on the anthill will kill some ants that come into contact with the hot liquid.
“The best way to use coffee grounds for plants is adding it to your compost pile, and then mixing a little bit of that compost in with your potting soil,” Marino says. Diluting coffee grounds works the same way as diluting fertilizer: using just a teaspoon of coffee grounds per gallon of water.
In most cases, the grounds are too acidic to be used directly on soil, even for acid-loving plants like blueberries, azaleas and hollies. Coffee grounds inhibit the growth of some plants, including geranium, asparagus fern, Chinese mustard and Italian ryegrass.
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