Against a white background, Black Rock Grills Horticultural Lava Rocks form a mound of reddish-brown, porous volcanic rocks. These 1-2cm rough-textured stones vary in size and shape, enhancing water retention and making them perfect for hydroponic culture. Available in 20kg bags.
Hands holding Black Rock Grill Horticultural Lava Rocks (1-2cm, 20kg) against a white background, highlighting their excellent water retention properties perfect for hydroponic culture.
A row of round cacti with spiky exteriors thrives in a greenhouse, planted in brown soil enhanced with Black Rock Grills Horticultural Lava Rocks (1-2cm, 20kg) for better water retention. Sunlight filters through the glass, casting subtle shadows on brick-paved ground.
The Black Rock Grill Horticultural Lava Rocks (1-2cm, 20kg) feature uneven, earthy-colored stones in brown, gray, and reddish-brown. Known for their rough, porous texture, these rocks are perfect for hydroponic culture due to excellent water retention properties.

Horticultural Lava Rocks | Lava Rocks for Plants 1-2cm, 20kg

Regular price29.95 GBP 12 reviews
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Lava rock is a great medium for drainage and water retention.

Lava rock has neutral Ph. It can be used many times as a hydroponic culture after washing.

Lava Rock Usage in Agriculture Industry:

  1. Inland reclamation
  2. In-plant cultivation in less soil or soilless environments
  3. In agricultural – green areas with limited water feeding.
  4. Hydroponic & Aquaponic Growing Systems

There is no weed problem. Thermal temperature control around the root equally keeps it from growing, protects it from heat and cold. Keeps the oxygen rate high around the root. Provides healthy root formation. This provides the plant to grow more vigorously. It is useful for the water economy, prevents evaporation of water, creates low energy costs. Provides higher quality water to the roots. It provides faster growth of microorganisms that make the nitrogen in the soil water-soluble so that the plant can take it. Long-lasting structure (arrangement of soil grains) Resistant to insects, fungi, and plant diseases. It does not contain any toxic substances to plants, It is homogeneous, easy watering Low salt content Having a certain cation change  It is very rich in chemical minerals. Can be used over and over again

Aquarium lava rocks are volcanic natural substrates for aquascaping aquariums.

Highly porous volcanic rock
The highly porous volcanic rock has various tasks in an aquascaping aquarium: First, it provides a stable base for further constructions of stone and/or wood (roots), which would slip further down through the soil. On the other hand, many beneficial bacteria settle in the porous structure, contributing to a positive water environment. Furthermore, the porous rock structure provides good penetration of nutrients and provides many minerals, allowing plants to root and grow very well.

Rock size: 1-2cm approx

20kg Bag, Handpicked

100% Natural

Ph Neutral 


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