Black Basalt 20mm Bulk Bag (800KG)

Ideal for large garden projects, driveways, pathways, and borders; helps prevent weeds, retains moisture, and is low maintenance, enhancing any outdoor space.

Transform your outdoor space with the striking Black Basalt 20mm Bulk Bag. This dramatic gravel, appearing black when wet and dark charcoal grey when dry, is perfect for creating contrast and showcasing vibrant garden features. Whether you're embarking on a large garden project, laying a driveway, or designing pathways and borders, our basalt is a versatile and stylish choice. As a dark volcanic rock, it is extremely hard-wearing and durable, making it an ideal addition to any landscape. The gravel's shiny surface when wet adds a touch of elegance, while its functionality helps prevent weed growth and protects soil from drying out in sunlight.

Available in bulk bags of approximately 800kg or standard 25kg packs, this decorative aggregate is low maintenance and perfect for enhancing alpines and rock gardens. Whether you're incorporating decorative pebbles for vases, aquatic gravel, or chippings into your design, Black Basalt provides a robust and aesthetically pleasing solution. With its ability to resist the elements and support vibrant plant life, it's a must-have for any garden enthusiast seeking to elevate their outdoor ambience.

For best results, we recommend a depth of 40–50mm for decorative areas, and around 150mm for driveways that need to handle vehicle weight. Our calculator is based on a 40mm depth to help you estimate easily.