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 »  Home  »  home  »  Recycling coffee grounds
Recycling coffee grounds
By Green Living Tips | Published  12/12/2010 | home , garden
10 tips for recycling coffee grounds

A nice filter coffee ... mmm.. I don't think there's anything that tastes better ..except maybe for pizza. If I was ever doing anything else for a living, I think I would like to work in a shop that sells coffee beans ..or pizza :).

One of the great things about filter coffee is not only the better taste compared to instant, but the grounds can be recycled and used in a variety of ways. Since pizza doesn't leave any grounds, or even crumbs in my case, I'll just focus on coffee in this article.

I use the term "recycle" rather loosely as recycling means to make more of the same product from waste from that product. A more accurate term in relation to coffee grounds would be reuse, repurpose, upcycle or downcycle, but recycle is a word that seems to be an umbrella term these days - and some folks do actually recycle coffee grounds it seems (read on).

Here's 10 quick tips for reusing coffee grounds:

- If you have a worm farm, dump the grounds in - I swear the caffeine jolt makes the worms chomp through more. But seriously, it doesn't seem to do them any harm; but I'd recommend mixing them through the pile so the worms don't overdose on any residual caffeine.

- Use coffee grounds as a plant fertilizer. Sprinkle the grounds around the base of the plant then dig them in a little. They can also be sprinkled directly on your lawn.

- Add the grounds to compost piles to enrich nutrient content - the grounds contain Nitrogen, Phosphorus, Potassium, Calcium, Magnesium and Sulfur. Phosphorous is becoming scarce, so we need to conserve it as much as possible.

- Add water to the grounds and allow to stand for a day or two. Drain off and then use as a liquid plant fertilizer - cold coffee that you'd usually toss down the sink can also be used in this way.

- After drying the grounds thoroughly, add them to an old stocking. Tie off the ends and then use in cupboards and your refrigerator as an odor absorber. Alternatively, you can just place the dried grounds in a container of some sort.

- Rubbing your hands with used coffee grounds will remove strong smells such as onion or fish.

- Grounds can be used as a scourer for greasy pots and pans

- A ring of coffee grounds around sensitive plants can discourage ants and some other pests.

- Use as a wood stain. Allow them to soak in a small amount of water overnight (or hot water for a shorter period), then drain off. The amount of water you use will determine how dark the stain is. Also good for touch-ups to mahogany furniture.

- This one's interesting and I can't say I've tried it. Dry out the coffee grounds in a warm (not hot) oven; then add equal weight of fresh coffee grounds and then use that mix to create another brew. After that brew, try one of the tips above - I wouldn't recommend repeating the cycle :). 

By the way, a good tip for how *not* to use coffee grounds. Don't try to get rid of them via your kitchen sink. They'll stick to grease in the drain and form the basis for further build-up. Over a period of time this will totally clog the drain.

With all these wonderful re-use options for coffee grounds; perhaps hit your local coffee house and ask them if you can collect theirs on a regular basis. They'll reduce waste and you'll have a useful product - everyone wins! You might want to get in quick; since the time this article was originally published it seems many people have been doing just that, so used coffee grounds are becoming quite sought after

Below are some additional tips from GLT readers. If you have other uses for coffee grounds, please add your ideas!




Michael Bloch
Green Living Tips.com
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  • Comment #1 (Posted by Lisa)

    If I sprinkle them on my lawn, will it attract animals?
     
  • Comment #2 (Posted by Michael (Green Living Tips))

    Lisa, that's an interesting question. I don't have a definitive answer for you, but I have heard that coffee grounds will actually repel cats - stop them from doing their business in the area where the coffee grounds are sprinkled.
     
  • Comment #3 (Posted by Sebastian)

    Palm trees love coffee grounds! I replaced fertilizers with coffee grounds for my home's palm trees and get the same result. Best part, the coffee grounds don't make the grass around the palms grow disproportionate to the rest of the yard when compared to chemical fertilizers. Works great with citrus trees as well.
     
  • Comment #4 (Posted by Michael - Green Living Tips)

    Thanks for the tip Sebastian :)
     
  • Comment #5 (Posted by Theresa)

    Any suggestions on the best way to dry grounds? I tried putting them in an empty coffee can, but found that the grounds on the bottom remained damp, and then started to mold. I'll check back for any answers.
     
  • Comment #6 (Posted by Michael - Green Living Tips)

    Hi Theresa, an easy way to do this is to use the heat from your oven after cooking another meal. The oven shouldn't be too hot, just warm - and you'll then be utilizing heat that would have been wasted anyway. Place the grounds in the oven spread out over a tray. If you don't have a convection oven; perhaps just spread on a tray out in the sun, but out of the wind.
     
  • Comment #7 (Posted by Libby)

    We recently moved & took our refrigerator with us. We had to put the fridge in storage for several weeks before the closing date. The movers advised us to clean & dry the fridge thoroughly and then put used coffee grounds in old pantyhose before sealing up the fridge. As promised, it really did prevent that "dead body" smell you'd expect from a fridge that was unplugged and sealed up half the summer.
     
  • Comment #8 (Posted by Laura)

    Mix with paint...makes a great textured paint for artwork!
     
  • Comment #9 (Posted by Michael - Green Living Tips)

    Laura and Libby, thanks for those great tips!
     
  • Comment #10 (Posted by Kim )

    You can also sprinkle the grounds around any entry point for ants in your home to deter them. I have them in an upper level window sill with a tree directly next to it. This was a problem area of ants for me, but with the grounds in there I have see a marked improvement with out harsh chemicals in our sleeping areas.
     
  • Comment #11 (Posted by David)

    Why didn't I think of that. It seems like good old fashioned common sense to use natural/organic fertilizer instead of the commercial ones. I particularly like the coffee grounds idea. Can't wait to try it tomorrow!
     
  • Comment #12 (Posted by Joshua Bogart)

    Comercial container shippers keep coffee around to remove smells from containers, if a container comes in with a bad smell they cover the floor with a thin layer and then seal it up. in two days they open it up and all the smell is gone. Will remove any smell from a closed room or cupboard
     
  • Comment #13 (Posted by Liza)

    Starbucks, which has locations absolutely everywhere, has a "grounds for your garden" program. At some locations they'll have bags of used grounds sitting at the front door in a basket for you to take. If you don't see it, ask at the counter. The staff have always been very friendly and willing to bag up any used grounds for me. I add this to my compost heap since the soil where I live is very alkaline, and coffee grounds adds acidity.

    I read on the Starbucks websites that they also make the used grounds available to cities to use as fertilizer in parks and playgrounds. I think this is a great idea, and one to be encouraged.
     
  • Comment #14 (Posted by Meagan)

    Does Decaf coffee grounds work as well? How about unused fresh out of the can coffee grounds?
     
  • Comment #15 (Posted by Frederique)

    for people who like me do not drink coffee but want some coffee ground for their plants/ garden , Starbuck has been offering free bags of coffee ground in their shop. Nice way of recycling.
     
  • Comment #16 (Posted by betty)

    can any one answer #14 Meagens question ?????
    I WOULD LIKE TO KNOW ALSO.
     
  • Comment #17 (Posted by Maddy)

    I would also love to know the answer to #14...can we use decaf coffee? And also does fresh coffee work?
     
  • Comment #18 (Posted by Larry)

    I have Pinon trees that are just planted and wondering if I use the coffee ground on them I know they are use in garden, compost and some flowers, but nothing mentioned about using around the Pinon trees.

    Thanks
     
  • Comment #19 (Posted by Shane)

    I have been using coffee grounds in my garden since the start of this year and have so far gone through 1.5 tonnes of it.

    Either in one of my three compost bins, straight onto the vegetable garden, used to build garden beds, sprinkled over the paving to keep away ants, over the lawn to act as a slow release fertiliser and to build up the soil. Some of it I give to neighbours and friends.

    We have started an initiative in Australia called Ground to Ground, with is aiming to make better use of coffee grounds, which are almost always thrown into the bin. That is a real waste. Please visit http://groundtoground.org to learn about how to get involved.
     
  • Comment #20 (Posted by Judy)

    My gramma always used left over coffee on her plants and left over grounds by throwing them directly in her garden-right out of the pot!
    I take mine each day and pitch them anywhere in garden or where landscaping is. I think it has repelled snails, but I am not certain - tho, my flowers aren't eaten as they used to be.
     
  • Comment #21 (Posted by Canuck Nanooks)

    we use coffee grounds and old coffee as a hair rinse (well, those of us who are brunette) Coffe grounds and eggs shells are a nice ammendment to soil for annual potted plants
     
  • Comment #22 (Posted by Nikoletta)

    At Whole Foods Market JAX, all the grounds are collected from the coffee bar and offered to customers to take home as much as they'd like. That is over 500 lbs each month!
     
  • Comment #23 (Posted by Mavis Wood)

    I have been putting used coffee grounds on my garden for many years. At church doings, I now have a one- gallon bucket in the kitchen that says: "Coffee Grounds Only", and the ladies (and men) there are finally used to the idea that all coffee grounds go into the bucket. I put them around my pine trees especially, but they get sprinkled on the lawn, dumped on the garden, put into my compost tumbler, or spread around the blueberry bushes.
    I also take home the extra coffee and drink that. Just try to unplug the pots as soon as serving starts so that the coffee doesn't get bitter from being heated for hours. There are two other ladies at our church who drink this coffee and share it with their husbands.
    As for putting unused grounds on the garden, I can't imagine why anyone would want to do that, but I'm sure it wouldn't hurt anything.
     
  • Comment #24 (Posted by Kathleen )

    I dry my grounds then add to a jar with some olive oil. Use this as a scrub in your shower for you body . . . wonderful!
     
  • Comment #25 (Posted by Deni)

    Can sprinkling the grounds ON the ant bed get rid of them? there's one huge one that i want to get rid of b4 spring.
     
  • Comment #26 (Posted by Connie)

    I put leftover coffee as well as tea on my potted lemon trees and they are growing like crazy. I also dry the grounds in a warm oven and save to add to all other potted plants. It's a great fertilizer for basil as well. The grounds are a nitrogen source so most all plants can benefit from mixing some grounds into the soil.
     
  • Comment #27 (Posted by Richard)

    When I googled it I even saw a result that a company makes fireplace logs from recycled coffee.
     
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