How to Reuse Coffee Grounds: Compost, Fertilizer, and More

Most of us simply toss out our used coffee grounds after brewing — but they’re surprisingly useful beyond your morning cup. Here are three practical ways to give your coffee grounds a second life, plus one bonus tip you can try today.

1. Compost Booster

Coffee grounds are rich in nitrogen, which makes them a powerful addition to compost. Mix them in with other “brown” materials like dried leaves, shredded paper, or cardboard to balance out moisture and nutrients. This not only helps break compost down faster but also produces richer soil for your plants.

Pro Tip: Avoid dumping coffee grounds directly onto delicate plants or seedlings — they can be too acidic in large amounts. Composting first keeps everything balanced.

2. Fertilizer for Garden Plants

Sprinkling small amounts of used coffee grounds directly into garden soil can enrich it with nutrients like nitrogen, potassium, and magnesium. Tomato plants, roses, and hydrangeas in particular benefit from the added acidity and organic matter. Just mix the grounds lightly into the topsoil rather than leaving them in clumps, so water and air can flow freely.

How Much to Use: A thin handful (about half a cup) per plant every couple of weeks is plenty. Overdoing it can compact the soil and block moisture.

3. Natural Deodorizer

Used coffee grounds naturally absorb odors, making them a low-waste alternative to baking soda. Place a small bowl of dried grounds in the fridge or freezer to neutralize food smells, or tuck some into a breathable sachet for closets and shoes. They’re especially handy for keeping kitchen spaces fresh.

Bonus: Scrub for Pots & Pans

The coarse texture of coffee grounds makes them a gentle abrasive. Sprinkle a small amount on a sponge or directly into greasy pans, then scrub with warm water. It helps lift stuck-on food without harsh chemicals — just avoid using it on nonstick surfaces to prevent scratches.

Want More Coffee Tips?

If you’re a French press fan, check out our full step-by-step tutorial where we cover brewing, cleaning, and getting the most out of your press.

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