Coffee Grounds Are a Gardener’s Best Friend: 10 Clever Uses

If you’re a fan of filter coffee in the morning, you probably have a habit of throwing your coffee grounds in the trash. However, this beverage, which is a real ritual for many of us, can also help us take care of our vegetable garden thanks to its fertilizing elements and minerals. Here are 10 frugal, ecological and practical tips for using coffee grounds in your garden. Some everyday wastes can be very useful if you know the right tips. Coffee grounds are one of them and can help you care for your plants in many ways. Before storing it for regular use, be aware that it must first dry outdoors or on a plate in a still slightly warm oven. After drying, put it in a bag and store it in the freezer. It will be ready to use after three hours. If you prefer to have it handy, just put it in an airtight box in the refrigerator. It is the ideal solution to store it for several days. Now that you know more about how to preserve this ingredient, let’s move on to its many uses:

Here are 10 uses for coffee grounds in your garden:

  1. To keep pests away.

If your vegetable plants and flower beds are a favorite target for slugs, you can use coffee grounds as a natural repellent. Sprinkle it around your plants to do so. Its strong smell also repels ants, aphids, nematodes and flies. A great benefit to protect your plants naturally. Don’t forget to re-spray it after heavy rains and place it around young seedlings to prevent them from being eaten by pests. There are 12 more tips for recycling coffee grounds at home.

  1. To activate the compost

This natural and ecological solution is very simple. If you have a worm composter to sort your organic waste, you just need to add coffee grounds. An ingredient that earthworms especially love because it facilitates the digestion of organic matter in the compost. Earthworms are also sensitive to caffeine and will break down these plants faster if you provide them with coffee grounds.

  1. To repel cats.

If the love we dedicate to these furry companions must not be questioned, it does not prevent us from wanting to protect our plantations. In fact, it is difficult to make them understand that we should not approach our plants. To prevent your cat from nibbling on your plants, spray the leaves with coffee grounds mixed with a little water or place something at the base of your plantings. The smell is strong enough to repel it, especially if you add some orange or lemon peel and zest.

  1. Enrich the soil with nutrients.

Coffee grounds are rich in phosphorus, potassium and copper and are an ideal fertilizer to add nutrients to your plants and improve soil structure. It works in addition to your natural nitrogen-rich fertilizers (horn meal, nettle manure, etc.) to give your beautiful plants everything they need to grow. Sprinkle coffee grounds at the base of your young shoots or work them directly into the soil. Bonus: Its acidity is also useful for enhancing the color of your fruits and flowers. So, if you’re growing orchids or hydrangeas, feel free to put them anywhere. You can also grow orchids at home by following these tips.

  1. to prepare liquid organic fertilizer.

To make your own homemade fertilizer, first scoop coffee grounds from the filter of your coffee maker, then pour them into a large container with 2 quarts of water. Mix for a few seconds and set aside in a dark, cool room for a day or two. After 48 hours, strain the preparation to recover the coffee beans and pour the remaining solution into a spray bottle. It can be used as a natural fertilizer to water your plants.

  1. To attract earthworms

Coffee grounds attract earthworms, which are responsible for transporting it underground. By sprinkling it on your soil, it brings nutrients to your plantations and also serves as food for earthworms. This type of earthworm plays an important role by promoting soil aeration through their movements.

  1. To grow your tomatoes

If all fruits and vegetables cannot tolerate coffee grounds, tomato is one of the plants that benefit from this fertilizer. If you sprinkle coffee grounds on the feet of this summer vegetable, you will get beautiful red tomatoes thanks to the acidity of your ingredient. You can even add a few eggshells to enrich the soil. It is also the ideal alternative to chemical fertilizers.

  1. To avoid slipping on driveways in winter.

If growing vegetables is not your interest, this tip is for you. In fact, coffee grounds are not only used to optimize plant growth. It’s also a great eco-friendly replacement for salt to prevent slipping on frozen driveways in the winter. Coffee grounds are not only environmentally friendly, but also behave like this spice. On the other hand, it avoids increasing the salinity of the water and soil, and thus the degradation of ecosystems.

  1. To grow mushrooms

Those who like to grow their own vegetable garden will be delighted to discover this trick. And for good reason, it allows you to grow delicious mushrooms using a natural and inexpensive method. To do this, you will need coffee grounds and mycelium (vegetative part of the mushroom, editor’s note). If you have your ingredients on hand, put them in a bag and place it in a warm, dark place for 3 weeks. After this time, move the bag outside and start watering to retain moisture. The first mushrooms should appear after about ten days!

  1. To clean your wooden fences.

Ideal to get rid of mosquitoes easily, coffee grounds are also an excellent cleaner to maintain wood, preserving its color and eliminating small scratches and streaks that dull its surface. If you have a garden shed or wooden fences that you want to clean naturally, the trick is simple. Mix white vinegar, water and coffee grounds in equal parts in a bowl and let it sit for about an hour. Then, soak a cloth with this mixture and apply it directly to your boards. All you have to do is rub for a few minutes to make them shine again. This trick also works indoors to make your wooden furniture shine.


Coffee grounds can be very useful for your garden but remember that it is not suitable for all plants. As a precaution, use it in small doses first and then see if it has a positive effect on your plants. As with any natural ingredient, moderation is essential to avoid counterproductive effects on your vegetable garden!

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