Cocoa shells

May 13 2026, 5 min reading time

Are you tired of weeding every week, or are you looking for a way to give your garden a well-maintained, warm appearance? In that case, cocoa shells are an excellent choice. This 100% natural ground cover is not only functional but also spreads a wonderful fragrance. In this blog, we tell you everything you need to know about the use, benefits, and practical application of cocoa shells in the garden.

What are Cocoa Shells?

Cocoa shells are a byproduct of the chocolate industry. When cocoa beans are roasted, the outer skin (the shell) separates from the nib. While this was once considered waste, it is now a very popular ground cover for gardens. They are light, fleshy shells with a deep brown color that compost over time, returning nutrients to the soil.

The benefits of Cocoa Shells

Using cocoa shells offers numerous benefits for both the plants and the gardener:

Weed prevention: By applying a dense layer, sunlight is prevented from reaching the soil, which prevents weed seeds from germinating.
Moisture regulation: The layer prevents water from evaporating from the soil, better protecting your plants against dehydration during hot summers.
Soil improvement: During the decomposition process, organic material is released that improves soil structure and provides nutrients (similar to stable manure).
Aesthetics: The dark brown color creates a beautiful contrast with the green of your plants.

How do you use cocoa shells in the border?

For optimal results, proper application is crucial. Always start with a weed-free soil. Then, spread a layer at least 3 to 5 centimeters thick between your plants. An important step often forgotten: spray the shells with water immediately after application. This makes them heavier and causes them to stick together, which prevents them from blowing away.

What to look for when buying Cocoa Shells?

When buying cocoa shells, quality is essential. Ensure that the shells are packaged well-dried. High-quality shells, such as those from Culvita, are sieved so that they contain little dust or grit. Also, check that the product is pure and contains no additives. Because it is a natural product, the color may vary slightly per batch, so it is smart to order enough for the entire surface at once.

Cocoa shells against cats

Many gardeners suffer from cats using the border as a litter box. Cocoa shells are an animal-friendly way to prevent this. The structure of the shells is unpleasant for cats on their sensitive paws. Furthermore, they cannot dig in them easily. As a result, they will be more likely to find another spot, and your garden will remain clean.

Cocoa shells against Slugs

Slugs pose a major threat to young plants such as hostas or lettuce. Cocoa shells have a sharp, dry structure that slugs do not like to crawl over. It extracts moisture from their slime trail, causing the shells to act as a natural barrier. It is not a 100% guarantee, but it significantly reduces slug problems in your borders.

Frequently asked questions about Cocoa Shells

Tree bark or Cocoa Shells: What is the best choice?

Although both products are natural ground covers, there are clear differences. Tree bark lasts longer (sometimes 3 to 5 years) and is heavier, making it stay in place better on slopes. Cocoa shells, on the other hand, nourish the soil more actively, are more effective against slugs and cats, and provide a more luxurious appearance due to their fine structure. However, cocoa shells are lighter and can shift more easily in high winds if they have not been wetted down well.

How many Cocoa Shells do you need?

To effectively prevent weeds, we recommend a layer of 4 centimeters. You can easily calculate the required amount with the formula: surface area in m² x 0.04 = number of m³. In practice, this means that you can cover about 1 to 1.5 square meters with a 50-liter bag.

How long do cocoa shells last?

Cocoa shells are an organic product and will compost over time. On average, they remain effective for one to two years, depending on weather conditions and soil activity. For a consistently beautiful result and optimal weed control, it is advisable to add a thin layer of 1 to 2 centimeters every spring.

Are cocoa shells safe for dogs?

This is an important point to consider. Cocoa shells contain theobromine, the same substance that makes chocolate toxic to dogs. Although most dogs have no interest in the shells, some dogs may eat them. If you have a dog that eats everything it encounters, it is wise to be cautious or to choose an alternative such as tree bark.

Why is there mold on my cocoa shells?

Don't panic! After the first contact with water, a white mold fluff may appear. This is a natural process of bacteria that make the shells stick together. After a few weeks, this disappears by itself, and the shells will remain firmly in place.

Do cocoa shells acidify the soil?

No, unlike some types of conifer bark, cocoa shells have a fairly neutral pH value. Therefore, they do not cause acidification, making them safe to use with almost all plants, including roses and perennials.

Can cocoa shells be used on a sloping embankment?

This is less recommended. Because cocoa shells are very light, they can wash down during heavy rainfall. For steep slopes, a heavier ground cover such as coarse tree bark is often more suitable.