It’s easy to scoop spent coffee grounds into the trash after making your morning cup. But before you do, take a look at what’s left behind. Used coffee grounds can still be handy around the house and garden, from adding them to compost to helping scrub away stubborn grime.
They won’t replace every store-bought product, and some popular coffee-ground hacks are better treated with a little caution. Still, there are plenty of practical ways to give those grounds another use instead of sending them straight to the garbage.
Add Coffee Grounds to Compost
Coffee grounds are a useful addition to a compost pile. They contain nitrogen, which contributes to the mix of materials needed to produce finished compost.
Used grounds should be mixed with plenty of carbon-rich materials such as dry leaves, cardboard, or other yard waste. Adding a thick layer of grounds by itself can create a dense, wet mass, so mixing them throughout the pile works better.
Related: 7 Natural Ways to Add Nitrogen to Your Garden Soil
Make a Body Scrub
The coarse texture of used coffee grounds makes them useful as a homemade body scrub. Mixed with a little coconut oil or another suitable moisturizer, they can help remove dead skin and leave your skin feeling smooth.
Keep the pressure light, since rough scrubbing can irritate your skin. Coffee grounds are better suited to the body than sensitive areas such as the face.
Related: Homemade Coffee Scrub with Coconut Oil
Make Homemade Soap
Spent coffee grounds can be mixed into homemade soap for a textured bar with gentle scrubbing qualities. The grounds give the soap a little extra grit, which can be handy for washing hands after gardening or other messy jobs.
If you’re making soap from scratch, follow a tested soap-making recipe and handle lye with the proper safety equipment. For an easier project, coffee grounds can also be added to a ready-made melt-and-pour soap base.
Add Them to the Garden
Coffee grounds can contribute organic matter to garden soil, but they aren’t a magic fertilizer. Used grounds contain some nutrients, yet their value comes largely from adding organic material to the soil.
Mix a modest amount into compost or soil rather than spreading a thick layer around plants. Despite their reputation, used coffee grounds aren’t strongly acidic after brewing, so they shouldn’t be treated as a special fertilizer for acid-loving plants.
Plants such as blueberries and azaleas need properly acidic soil, so a soil test is a better way to decide what your garden actually needs.
Neutralize Household Odors
Coffee grounds can help with certain unpleasant smells. Put dry, used grounds in a small open container and place it in an area that needs freshening, such as a refrigerator or pantry.
They won’t replace proper cleaning, but they can be a handy option for dealing with mild odors. Let the grounds dry completely before storing them, since damp grounds can develop mold.
Try Them as an Ant Deterrent
Some people scatter used coffee grounds near areas where they’ve seen ants. The strong smell and texture may discourage ants from crossing certain spots, but coffee grounds aren’t a dependable way to eliminate an infestation.
If you try this trick, use it as a temporary deterrent rather than a complete pest-control solution. For a persistent ant problem, identify where the ants are entering and use an appropriate treatment.
Related: How to Make a Borax Ant Trap
Don’t Rely on Coffee Grounds to Treat Dog Fleas
Coffee grounds are sometimes recommended as a natural flea treatment for dogs. Rubbing them into a dog’s coat isn’t a reliable way to get rid of fleas, though, and coffee can be harmful to pets if it is swallowed.
If your dog has fleas, stick with a flea treatment recommended by your veterinarian rather than relying on used coffee grounds. Coffee grounds are better kept in the compost bin than on your pet.
Cover Minor Scratches on Dark Wood
A little coffee can temporarily darken the appearance of a small scratch on dark wood furniture. Rub a small amount of damp coffee grounds over the scratch, let it sit briefly, then wipe the area clean.
This works more like a quick cosmetic fix than a true repair. Test it on an inconspicuous area first, since the color may not match every wood finish.
Remove Food Smells From Your Hands
Garlic, onions, and other strong-smelling foods can leave their scent on your hands long after dinner is finished. Used coffee grounds can help scrub away some of that lingering smell.
Rub a small amount between your hands, then rinse thoroughly with soap and water. Since the grounds are abrasive, don’t scrub too hard, especially if your skin is dry or irritated.
Use Them for Messy Cleaning Jobs
The coarse texture of coffee grounds can make them useful for scrubbing certain stubborn messes. They can help loosen grime from sturdy items such as some pots and pans.
Be careful about where you use them. Coffee grounds can scratch delicate finishes, enamel, polished surfaces, and other materials. They should also never be washed down the sink, where they can contribute to clogs.
Use Coffee Grounds Around Outdoor Spaces
Coffee grounds are sometimes promoted as a natural mosquito repellent. The evidence for simply scattering used grounds around the yard isn’t strong enough to count on them as a reliable mosquito-control method.
If you’re experimenting with coffee grounds outdoors, don’t treat them as a substitute for proven mosquito-control measures. Removing standing water remains one of the more useful ways to reduce mosquito breeding areas around your home.
Make a Natural Dye
Coffee grounds can create warm tan and brown shades for craft projects. They can be used to dye materials such as cotton and linen, giving fabric a naturally aged appearance.
The finished color will vary depending on the fabric, coffee, concentration, and soaking time. Test a small piece of material first if you need a particular shade.
Make a Coffee-Scented Candle
Spent coffee grounds can be used in homemade candles for decoration and texture, though they aren’t the best way to create a strong coffee fragrance. If you add grounds to candle wax, use a tested candle-making recipe and keep the amount small.
Loose plant material and other particles can affect how a candle burns, so don’t add large quantities of grounds or place them near the wick. For a stronger coffee scent, a candle fragrance oil made for candle-making is a better option.
Related: 10 Stunning Homemade Candles You’ll Want to Make
Donate Them to a Community Garden
Before throwing your grounds away, check with a nearby community garden. Some gardens collect coffee grounds for their compost piles or other gardening projects.
Call or check the garden’s guidelines before dropping anything off. Not every garden accepts outside materials, and some have specific rules about what they can use.
Use Coffee Grounds With Houseplants Carefully
Coffee grounds are often recommended as a quick houseplant fertilizer, but putting a thick layer directly on top of potting soil isn’t a good idea. Too many grounds can create a compact layer that holds water and makes it harder for air to reach the roots.
A better option is to add used grounds to compost and use the finished compost with your potting mix. If you want to try coffee grounds directly, use a small amount and watch how your plant responds.
For more ideas, check out How to Use Coffee Grounds on Houseplants.
Used coffee grounds may seem like kitchen waste, but they still have plenty of possible uses. Some are handy for cleaning or crafting, while others work best when added to compost. Just let the grounds dry before storing them, and skip the sink, where those leftover grounds can cause plumbing trouble.
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