What can you use old coffee grounds for?

Coffee is one of the world’s most beloved beverages, providing a daily dose of caffeine and comfort to millions of people. But what happens to the coffee grounds left behind after brewing your morning cup of joe? Are they just waste, or can they be put to good use in your garden? In this blog post, we’ll explore whether coffee grounds are beneficial for plants and how to use them effectively in your gardening endeavours.

The Benefits of Using Coffee Grounds in Gardening

  1. Organic Matter and Nutrient Boost

Coffee grounds are rich in organic matter and contain essential nutrients that can benefit your plants. They are a valuable source of nitrogen, which is a key component for healthy plant growth. Nitrogen promotes lush foliage, green leaves, and vigorous plant development. Additionally, coffee grounds contain smaller amounts of other nutrients like potassium and phosphorus.

  1. Soil Amendment

Coffee grounds can be used as a soil amendment to improve soil structure and water retention. When added to the soil, they help loosen compacted earth and enhance drainage. This can be particularly beneficial for heavy clay soils, which tend to hold too much moisture. By improving soil aeration, coffee grounds create a more hospitable environment for plant roots.

  1. pH Buffer

Coffee grounds are mildly acidic, which means they can help lower the pH of alkaline soils. Some plants, such as blueberries, azaleas, and rhododendrons, thrive in acidic soil conditions. If you’re growing acid-loving plants, incorporating coffee grounds into your soil can be advantageous.

  1. Pest Repellent

Coffee grounds have a reputation for deterring certain garden pests. Slugs and snails, in particular, are known to dislike the abrasive texture of coffee grounds. Sprinkling coffee grounds around your plants can act as a barrier, helping to keep these pests at bay.

Use coffee grounds around acid-loving plants to provide a slow-release source of acidity. Remember to monitor your soil’s pH to ensure it doesn’t become too acidic for plants that prefer neutral or alkaline conditions.


In summary, coffee grounds can indeed be beneficial for your plants and garden. They contribute valuable organic matter, essential nutrients, and can help with soil conditioning and pH adjustment. However, it’s important to use coffee grounds in moderation and as part of a balanced approach to gardening. Incorporating them into your compost, using them as mulch, and applying them strategically to benefit specific plants are all effective ways to make the most of your leftover coffee grounds while promoting healthy plant growth in your garden. So, next time you enjoy your morning coffee, consider giving those grounds a second life in your garden, and watch your plants thrive!