Vilmorin Clay Pebbles 5 Litre Bag

Vilmorin Clay Pebbles 5 Litres (Reference: 6400130) are a professional-grade drainage substrate made from natural clay expanded at high temperature. This versatile horticultural solution meets the drainage and aeration needs of soils for all types of cultivation, whether indoors or outdoors. Vilmorin, a leading French brand in the world of gardening since 1743, guarantees a reliable and high-performing product for discerning gardeners.

Benefits and Versatile Applications

These clay pebbles adapt to all types of planting: indoor potted plants, balcony window boxes, terrace planters, flower beds, urban vegetable gardens, Japanese gardens and rockeries. For houseplants, they form an ideal drainage layer at the bottom of containers, preventing root rot from excess moisture. Outdoors, they lighten heavy soils and improve the structure of clay-rich earth.

Landscaping professionals and home gardeners alike also use them for passive hydroponics, soil-free cultivation and as a decorative surface substrate. Their ability to regulate moisture makes them a valuable ally for tropical plants and species sensitive to variations in water levels.

Technical Properties and Composition

Vilmorin expanded clay features a unique porous structure obtained by firing at high temperature (over 1000°C). This process creates thousands of micro-cavities that give the pebbles their exceptional properties: rapid drainage, optimal aeration and moderate water retention capacity.

The pebbles generally measure between 8 and 16 mm in diameter, offering a perfect balance between drainage efficiency and stability. Their neutral pH (approximately 7) makes them compatible with all plant species. The raw material, exclusively of natural origin, contains no chemical additives and is perfectly resistant to frost, UV and thermal variations.

Installation and Usage Techniques

For container planting, place a 3 to 5 cm layer of pebbles at the bottom before adding compost. This technique prevents waterlogging while maintaining a beneficial moisture reserve. In open ground, incorporate the pebbles at a rate of 20 to 30% of the total substrate volume to lighten compact soils.

For hydroponics and pure pebble cultivation, rinse the substrate thoroughly before use to remove residual dust. The pebbles can be reused indefinitely after cleaning: simply wash them with clean water and allow them to dry. Their structure remains intact even after several years of intensive use.

Expert Tips and Product Synergies

Combine clay pebbles with a quality compost suited to your plants to optimise results. For acid-loving plants (azaleas, rhododendrons), pair them with ericaceous compost. Cacti and succulents will benefit from a mix with coarse sand to enhance drainage.

Professional tip: create moisture reservoirs by placing a saucer filled with damp pebbles under your tropical plants. The gradual evaporation maintains a favourable humid microclimate. In winter, this technique compensates for the dry indoor air caused by heating.

For urban terrace gardens, Vilmorin pebbles considerably lighten the weight of planters while retaining their drainage properties. They also make an excellent decorative mineral mulch that limits evaporation and the proliferation of weeds.

Technical Specifications