Using coffee grounds in the garden

6 Amazing Uses For Coffee Grounds in the Garden

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Many gardeners are always looking for natural and sustainable ways to improve their gardens, and using coffee grounds has become increasingly popular for this purpose. With millions of people drinking coffee every day, there’s no shortage of used grounds that can be repurposed for the benefit of your garden.

Coffee grounds are rich in nutrients that plants need, such as nitrogen, potassium, and phosphorus. Moreover, they can help with soil improvement, pest control, and composting. This article will explore how you can incorporate coffee grounds into your garden to improve soil quality, support plant growth, and create a more sustainable environment.

Used coffee grounds can be used to feed plants
Used coffee grounds can be used to feed plants

Benefits of Coffee Grounds in the Garden

Used coffee grounds can offer several benefits to your garden, enhancing your plants’ overall quality and productivity. This section will explore the advantages of using coffee grounds in the garden.

Pest Control

Another advantage of using coffee grounds in your garden is their ability to deter certain pests naturally. You can keep slugs and snails at bay by spreading the grounds around plants or in compost piles.

The texture of the grounds discourages these pests from coming in contact with your plants, helping to reduce their impact on your garden without the need for harsh chemical treatments.


As a natural source of nutrients, coffee grounds can be used as an effective and inexpensive fertiliser. Both used, and fresh coffee grounds are rich in nitrogen, potassium, phosphorus, and various micronutrients that plants need for healthy growth.

This means that instead of throwing away your used coffee grounds, you can repurpose them to feed your plants and encourage stronger, more vigorous growth.

Soil Improvement

One of the primary benefits of coffee grounds is that they help improve soil quality. By adding organic material to the soil, coffee grounds can enhance drainage, water retention and aeration in your garden. This results in a better-growing environment for your plants.

Moreover, coffee grounds can improve the soil’s water-holding capacity while reducing weed growth. This means that your plants will have easier access to the water they need for optimal growth, and you will spend less time dealing with invasive weeds.

Acid-Loving Plants

Several types of plants prefer slightly acidic soil, and coffee grounds can help provide this. Some acid-loving plants include hydrangeas, azaleas, rhododendrons, and blueberries.

Sprinkling used coffee grounds around the base of these plants will not only help to acidify the soil but also add nutrients, making them thrive.


Coffee grounds can be an excellent addition to compost piles or bins. They are rich in nitrogen, which is essential for the decomposition process. To include coffee grounds in your compost, simply mix them into your current compost materials.

The nitrogen in the coffee grounds will help accelerate the decomposition of other materials and create a healthy, nutrient-rich compost for your garden.

It’s essential to maintain a proper balance of green (nitrogen-rich) and brown (carbon-rich) materials when composting. Coffee grounds are considered green, so make sure to add an equal amount of brown materials, such as leaves or cardboard, to maintain the balance.

Worm Farms

Worm farms, also known as vermiculture, are popular for recycling organic waste into nutrient-rich worm castings. One of the items you can add to your worm farm is used coffee grounds.

In fact, worms love coffee grounds, and they help create a balanced ecosystem inside the farm. Alongside fruit and vegetable scraps, coffee grounds provide the proper nutrition and environment for worm reproduction and growth.

When adding coffee grounds to your worm farm, please don’t overdo it. Excess amounts can lead to acidity and temperature issues. Monitor your worm farm’s performance and adjust the addition of coffee grounds as needed to maintain a healthy environment for your worms.

How to Apply Coffee Grounds

This section will explore various methods of using coffee grounds in the garden, including directly applying them into the soil, and making coffee grounds tea.

Direct Application

One of the simplest ways to use coffee grounds in the garden is through direct application. Simply sprinkle the used grounds on the soil surface around your plants. This method can help improve soil structure, add nutrients, and even deter pests like slugs and snails.

It’s essential to spread the grounds thinly and evenly to avoid creating a thick layer of grounds which can form a barrier that prevents water and air from reaching the plant’s roots. HGTV recommends using no more than half an inch of coffee grounds to keep a healthy balance.

Incorporating into Soil

Another method to utilise coffee grounds in the garden is incorporating them into the soil. First, mix the coffee grounds with other organic matter like leaf mold, compost or well-rotted manure. This mixture can then be tilled into the top few inches of soil to improve its structure, increase aeration and nourish plants.

It’s important to use a balanced ratio of coffee grounds to other organic matter to prevent too much altering the soil’s pH, as coffee grounds can be slightly acidic.

Making a Coffee Grounds Tea

Coffee grounds can also be used to apply nutrient-rich “tea” to your plants. To make coffee grounds tea, follow these steps:

  1. Add one part used coffee grounds to five parts water in a bucket.
  2. Allow the mixture to steep for at least 24 hours, stirring occasionally.
  3. Strain the liquid to remove the coffee grounds.

The resulting coffee grounds tea can be used as a liquid fertilizer, providing essential nutrients to your plants. Be sure to dilute the tea with equal parts water before applying it to your plants to avoid over-fertilization or burning your plants.

Precautions and Considerations

When using coffee grounds in your garden, it is essential to take necessary precautions to avoid any adverse effects on your plants. Here are some sub-sections detailing the important considerations to keep in mind.

Avoiding Excessive Use

Though coffee grounds can be beneficial as a slow-release fertilizer, it’s vital not to overuse them. Sprinkling the grounds thinly around plants will provide enough nutrients without causing any issues. Excessive application of coffee grounds can make the soil too acidic, hindering plant growth.

Potential Mould Growth

Mould can be a concern when using coffee grounds, especially if they have not been fully dried. To mitigate the risk of mould growth, spread the grounds out to dry before using them in your garden. Alternatively, you can mix the grounds into compost, which will help break them down.

Impact on Certain Plants

Although coffee grounds can benefit most plants, some may not respond well to their use. Be aware of the specific needs of your plants and how coffee grounds may impact them. For instance, plants that prefer alkaline or neutral soil may not thrive well in acidic conditions created by adding coffee grounds.

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  1. Thank you for your idea on the use of coffee grounds As I am keen on recycling my waste what is your idea on Tea bags thank you

    1. Tea bags can be great, as long as they don’t contain plastic. If they do you can always chuck the tea leaves on the compost heap and throw the bags away.

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