Skip to content

Using coffee grounds in the garden: 7 clever outdoor applications

coffee grounds as a flower fertilizer tips application

In many households, fresh coffee grounds end up in the trash day after day, although they can be really useful in the house and garden. The waste product finds application not only in the manufacture of DIY beauty products , but can also be used super outdoors. What all you can do with coffee grounds in the garden, we reveal in the article.

What can you use coffee grounds for in the garden?

coffee grounds in the garden fertilize mulch fight pests

Next time you prepare your morning coffee, think twice about throwing away the used coffee grounds. Especially for those who have a garden, it turns out to be particularly practical. It can be used to fertilize, make mulch, scare away pests and unwanted animals, and speed up the growth of some plants. We summarize the useful applications of coffee grounds in the garden below.

1. composting with coffee grounds

coffee grounds in the garden compost rotting process accelerate

The first place you can dispose of coffee grounds instead of throwing them in the garbage is the compost bin. The leftovers from brewed coffee contain a lot of nitrogen, which can speed up the rotting process in the compost pile. The resulting compost then has a very fine structure that is good for plants. The coffee residue also attracts earthworms, which is another benefit to the compost and the plants. There is no limit to the amount of coffee you can spread on the compost pile. It is only important that the pH does not get too high.

2. coffee grounds against pests

coffee grounds in the garden against pests snails

Some slugs and other pests don’t like caffeine, so coffee grounds are perfect for protecting beds from them. Simply sprinkle some of the leftover coffee grounds around the vegetable bed to create a barrier layer. The only downside is that coffee doesn’t work on all types of pests. Still, it’s definitely worth a try.

Coffee grounds should also help against small flies in the potting soil. You can combat these by spreading the coffee grounds directly on the soil. If you light some dry coffee grounds on a fireproof base and let them smoke briefly, you can also scare away those pesky wasps around the garden table.

3. repellent against cats in the garden

drive cats away from the garden coffee grounds

Cats are cute and sweet, but can cause a lot of mischief in the garden. That’s why you need a suitable remedy to chase the velvet paws away from sandboxes and flower beds. In this place, coffee grounds have proven to be just as effective. Simply sprinkle the coffee grounds around the areas where cats are unwanted and the animals will give it a wide berth.

4. coffee grounds as fertilizer

coffee grounds in the garden applications gardening tips

One of the most common uses of coffee grounds in the garden is for fertilizing. The remains of coffee preparation are rich in valuable ingredients that are important for your plants. Coffee grounds contain a large amount of potassium, nitrogen, phosphorus, as well as various antioxidants – just like commercial fertilizer. However, as a waste product, the home remedy is much cheaper.

coffee grounds in the garden fertilize ornamental plants

If you want to fertilize with coffee grounds, you should let it dry beforehand. If it is damp, it will begin to mold and cannot be used as fertilizer. Therefore, first spread the coffee grounds in a large area on a large plate and let them dry well. Then pour the coffee grounds into an open container and store them in it until you need them.

You can either add the finished fertilizer to the irrigation water and water the plants with it or mix it directly with the soil. To do this, simply sprinkle the dried coffee grounds around the respective plant and mix it with the soil.

5. coffee grounds in the garden for plants that need acidic soil.

coffee grounds as fertilizer garden tips potted plants

Coffee grounds as a natural fertilizer is especially suitable for those plants that prefer acidic soil. The reason is that coffee is slightly “acidic” and thus can lower the pH of boggy soil. Coffee fertilizer is also good for houseplants, but you should not overdo it. So once a year is quite enough.

coffee grounds fertilizer flowers vegetables shrubs

Vegetables and plants in the garden should be fertilized with the ecological coffee grounds fertilizer up to four times a year for best results. Below we have provided a list of plants, shrubs and vegetables that benefit most from it.

  • Ornamental plants can be provided with all the essential nutrients free of charge if you use the coffee grounds as fertilizer. Plants like angel’s trumpet, geraniums, hydrangeas and rhododendrons benefit the most from the home remedy.
  • Berry bushes like a loose, humusy soil and are usually fertilized with compost. For shrubs such as blueberries, blackberries and currants, coffee grounds are perfect for use in the garden.
  • Vegetable plants are part of any kitchen garden and need a suitable soil to thrive and produce tasty vegetables. It is especially important what the soil is enriched with. You should only use fertilizers that are free of pesticides and pollutants. Organic fertilizing with coffee grounds is quite possible for vegetables such as squash, cucumbers, tomatoes and zucchini.

6. make mulch

use coffee grounds in the garden to make long-lasting mulch

The combination of coffee grounds and wood chips makes an ideal mulch for the garden . This is especially durable and can make weeding and watering easier for any amateur gardener. The longer durability of the mulch is due to the nutrients in the coffee grounds, which are released and thus regulate the moisture of the wood chips.

7. promote the growth of carrots and radishes.

use coffee grounds in the garden to accelerate carrot growth

There are some vegetables that particularly like coffee grounds in the soil. In addition to tomatoes, cucumbers, squash and zucchini, the soil for carrots and radishes can also be enriched with the miracle house remedy. This promotes the growth of these vegetables and can even lead to up to two times larger harvests. For this you should not work the coffee grounds into the soil, but mix it with the seeds while still planting. Try it out for yourself!

Extra tip: If you want to use coffee grounds in your garden but don’t drink coffee at home, you can ask a cafe or restaurant for their leftover coffee grounds. Many cafes would be happy to give them to you for free.