12 Clever Uses for Used Coffee Grounds (Instead of the Trash)
The short answer
Used coffee grounds are far too useful to throw away. Once you have brewed your cup, the leftover grounds can feed your compost, deodorise your fridge, scrub your pots, exfoliate your skin and more. Below are 12 practical uses, grouped by where you will use them, plus a few popular “hacks” that do not actually work, so you do not waste your time.
One tip before you start: dry your grounds first. Spread them on a tray or a sheet of paper until they are no longer damp. Dry grounds will not go mouldy, so you can collect them over a week or two before using.
In the garden and compost
1. Add them to your compost
This is the easiest and most useful option. Coffee grounds count as “green” material in a compost pile, adding nitrogen and feeding the microbes and worms that break everything down. You can toss the whole thing in, grounds and paper filter together. Keep grounds to roughly 10 to 20% of the pile so it stays balanced with “brown” material like dead leaves and cardboard.
2. Work a thin layer into soil
Used grounds are a gentle soil conditioner. Sprinkle a thin layer over your beds and mix it into the topsoil so it does not form a crust. Do not pile them on thick, and do not use fresh (unbrewed) grounds around plants, as too much can hold water against roots and slow young plants down.
3. A mild pest deterrent (with realistic expectations)
Some gardeners scatter dried grounds to discourage slugs, snails and ants. The evidence is mixed, so treat this as a nice-to-try, not a guaranteed fix. It will not replace proper pest control, but it does no harm in small amounts.
Around the house
4. Deodorise your fridge or freezer
Coffee grounds are brilliant at soaking up smells. Put a small bowl of dry grounds in the fridge or freezer and they will absorb food odours, much like baking soda. Swap them out every couple of weeks. (This is one of our own favourite uses at KNDZ.)
5. Neutralise smells on your hands
After chopping garlic, onions or handling fish, rub a pinch of used grounds between your hands under running water. The grounds help lift and neutralise the smell.
6. Scrub greasy pots and pans
The gritty texture makes grounds a natural, mild abrasive. Add a little to a sponge with dish soap to scour baked-on pots, pans and grill grates. Skip this on anything scratch-prone, and never put grounds down the drain, as they can build up and clog it.
7. Make a natural odour sachet
Dry your grounds, spoon them into an old sock or a small cloth bag, and tie it off. Tuck it into gym bags, shoes, the car or a closet to keep things smelling fresh.
Skin and beauty
8. A simple body scrub
Mix used grounds with a spoonful of coconut oil or honey for an all-natural exfoliating scrub. The coarse texture buffs away dead skin, and coffee is a common ingredient in cosmetic scrubs. Use it on your body rather than your face, and patch-test first if your skin is sensitive.
9. Freshen up a DIY candle
Coffee grounds can be pressed into homemade candles or simmered gently to release a warm coffee aroma around the house.
In the kitchen
10. A coffee rub for meat
Coffee's natural flavour works beautifully in a savoury rub. Mix dry grounds with salt, pepper, brown sugar and spices, then press onto steak or brisket before cooking for a rich, barbecue-style crust.
11. Deepen the flavour of baking
A small amount of finely used grounds (or a shot of leftover brewed coffee) intensifies chocolate in brownies and cakes. Coffee and cocoa are natural partners.
Outdoors
12. Help your compost bin, campsite and garden all at once
If you brew while camping, dried grounds can go straight into a compost bag to carry out, so nothing is left behind. It is the same principle at home: grounds are a resource, not rubbish.
Popular “hacks” that do not really work
Plenty of articles repeat these, but the science does not back them up:
- “Coffee grounds make soil acidic for blueberries and azaleas.” Not really. Most of the acid is water-soluble and ends up in your cup, so used grounds are close to pH neutral. They will not meaningfully acidify soil.
- “Grounds are a complete fertiliser.” They are not. Grounds hold only about 1 to 2% nitrogen and release it slowly, so they are a soil conditioner and compost ingredient, not a replacement for feeding your plants.
- “Just dump them straight on your plants.” A thick layer of wet grounds can compact and repel water. Always compost them first or use a thin, mixed-in layer.
Why drip bags make this easy
The catch with reusing grounds is usually mess: scooping soggy grounds out of a machine or plunger is nobody's favourite job. With a drip bag, the used grounds stay neatly inside the filter. Knock them straight into your compost or a drying tray, and recycle the bag. It is one of the quietly satisfying things about brewing this way.
Our 100% Arabica drip bag coffee is roasted in small batches in Toronto, so you get a great cup first, and a jar of useful grounds after. We share a few more of our own reuse habits on our coffee FAQ page.
Frequently asked questions
What can used coffee grounds be used for?
Plenty of things: composting, conditioning soil, deodorising your fridge, scrubbing pots, neutralising smells on your hands, making a body scrub, and adding flavour to meat rubs and baking. Dry them first so they keep well.
Can I just sprinkle used coffee grounds in my garden?
In a thin layer, mixed into the topsoil, yes. Avoid thick piles of wet grounds, which can compact and hold water against roots. Composting them first is the safest way to use them in the garden.
Which plants do not like coffee grounds?
Young seedlings and plants sensitive to too much moisture do best without grounds piled around them. And despite the popular claim, used grounds are close to pH neutral, so they will not reliably help acid-loving plants like blueberries.
Do coffee grounds keep animals away?
They may mildly deter slugs, snails, ants and some cats, but the evidence is mixed. Treat it as a low-effort extra rather than a dependable pest control method.
How do I store used coffee grounds?
Dry them first by spreading them on a tray or paper until they are no longer damp, then keep them in an open jar or container. Dry grounds will not go mouldy, so you can collect a week's worth before using them.
Do coffee grounds really deodorise a fridge?
Yes. A small bowl of dry grounds absorbs food odours much like baking soda. Replace them every couple of weeks for the best effect.
Related guides
- What is drip bag coffee? How the single-serve pour-over format works.
- Coffee for camping Six ways to brew outdoors, and how to pack grounds out.
- How to make iced coffee at home Three easy ways to brew iced coffee.