If they are raised the drainage should be OK, but for perennials and shrubs then good garden topsoil mixed with a bit of compost would be my choice. Not rocks and bricks. For shallow rooting veg or annuals you wouldn't need such deep earth.
Dordogne and Norfolk. Clay in Dordogne, sandy in Norfolk.
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If they are raised the drainage should be OK, but for perennials and shrubs then good garden topsoil mixed with a bit of compost would be my choice. Not rocks and bricks. For shallow rooting veg or annuals you wouldn't need such deep earth.