20mm Scoria Rock Bag

Lightweight volcanic stone | Ideal for drainage & garden beds | Naturally porous

20mm Scoria Rock is a lightweight, porous volcanic stone perfect for improving drainage in garden beds, behind retaining walls, and around soak wells or agi pipe. It's porous texture also lends it to use as a reservoir for self-watering pots or even as a grow medium for some plants.

Scoria’s excellent drainage properties help prevent waterlogging and root rot—making it an essential material for healthy gardens in clay-prone or wet soil areas.

Ideal for:

• Garden bed drainage and soil aeration
• Filling behind retaining walls or subsoil piping
• As a grow medium for suitable species in a self-watering setup.

Key Features:

✅ 20mm size – versatile and easy to handle
✅ Excellent drainage and water flow control
✅ Lightweight yet durable volcanic stone
✅ Natural earthy colour for landscaping appeal

Available in bulk or by the cubic metre for pickup or local delivery across Eltham, Research, Diamond Creek, and surrounding suburbs.