The gravel is available in a range of sizes to suit your landscaping project:
10mm, ideal for borders & paths
14mm, this is ideal for borders, paths and driveways
20mm, this is used extensively for driveways and paths as the size prevents excessive movement
How much you need? This will depend on the depth of the gravel and effect you are wishing to create. However, as a guide please allow 1 bulk bag for every 15m2 (at a depth of 50mm)
Your bulk bag 850 x 850x x 850 will hold enough to cover aprox 15m2 at 2 inches, saving you extra money.
Do you need Weed suppressant? Although gravel will act as a weed suppressant, it is advisable to lay a special membrane under your gravel, this allows the water to drain away and keep the weeds away.