Sempervivum – Shards of slate and local stone laid vertically, with earth compressed between, and planted with sempervivum.

Sempervivum - Shards of slate and local stone laid vertically, with earth compressed between, and planted with sempervivum.

Sempervivum – Shards of slate and local stone laid vertically, with earth compressed between, and planted with sempervivum – © Nicola Stocken/GAP Photos