Grodan Rockwool Propagation Cube for Seedlings and Cuttings

Grow healthy seedlings and cuttings with the perfect environment provided by the 75mm Grodan Rockwool Propagation Cubes. These cubes are designed to accommodate both large and small seeds, ensuring optimal growth conditions for a variety of plant types.

Features and Benefits

  • Optimal growth conditions: The rockwool material ensures a well-aerated environment that promotes healthy root development for seedlings and cuttings.
  • 75mm cube size: The cubes are 75mm x 75mm x 75mm in size, ideal for propagating seeds and cuttings to a larger size compared to 40mm or smaller blocks.
  • Versatile design: One side of the cube has a small indent for larger seeds or cuttings, while the other side is flat and suitable for small seeds, catering to various plant types.
  • No hole: The Grodan Rockwool Propagation Cube comes without any pre-drilled hole, allowing you to create a hole of the desired size for your specific seeds or cuttings.
  • Improved water retention: The rockwool material helps retain moisture, reducing the need for constant watering and ensuring your plants stay hydrated.

How to Use

  1. Moisten the Grodan Rockwool Propagation Cube in a bowl of water with an appropriate pH (approximately 5.5) and nutrient solution. Allow it to soak for one hour.
  2. While the rockwool cube is soaking, prepare your seeds or cuttings by ensuring they are clean and healthy.
  3. After soaking, remove the cube from the water and gently squeeze any excess moisture, making sure it remains moist but not too wet.
  4. Create a hole of the desired size in the cube using a clean and sterilised tool or your finger, depending on your seeds or cuttings.
  5. Place the seed or cutting in the hole, ensuring it is securely positioned and partially covered by the rockwool material.
  6. Place the cube in a suitable tray or container, maintaining optimal environmental conditions for your specific plant type.
  7. Monitor and adjust moisture levels as needed to encourage root growth and ensure a healthy plant.

Aqua Gardening Suggests These are Best For

The Grodan Rockwool Propagation Cube is ideal for hobbyist gardeners and professional growers looking to propagate a variety of plant types, including vegetables, herbs, and flowers. Its versatile design allows it to accommodate both large and small seeds or cuttings, providing the perfect environment for healthy root development and overall plant growth.


What is the purpose of the Grodan Rockwool Propagation Cube?

The Grodan Rockwool Propagation Cube is designed to propagate seeds or cuttings to a larger size than the 40mm or smaller blocks, providing them with an ideal environment for growth and development.

What are the dimensions of the Grodan Rockwool Propagation Cube?

The cube measures 75mm x 75mm x 75mm, making it suitable for a variety of seeds and cuttings.

Which side of the Grodan Rockwool Propagation Cube should I use for different seed sizes?

One side of the cube has a small indent for larger seeds or cuttings, while the other side is flat, making it perfect for smaller seeds.

What are the benefits of using Grodan Rockwool for propagation?

Grodan Rockwool provides excellent moisture retention, aeration, and insulation, creating an ideal environment for seed germination and root growth. It is also eco-friendly, as it is made from molten volcanic rock spun into fibres, making it a sustainable option.

Are Grodan Rockwool Propagation Cubes reusable?

While it is technically possible to reuse the cubes after carefully removing the previous plants and cleaning them, it is generally recommended to use new cubes for each propagation cycle to minimise the risk of contamination, pests, or disease.

Can I use the Grodan Rockwool Propagation Cube for hydroponics or other growing systems?

Yes, the Grodan Rockwool Propagation Cube can be used in various growing systems, including hydroponics, aquaponics, and traditional soil-based methods. It provides an excellent starting point for your plants, ensuring they have a strong root system in place before being transferred to their final growing medium.

How should I store unused Grodan Rockwool Propagation Cubes?

Store unused Grodan Rockwool cubes in a cool, dry place away from direct sunlight. This will help maintain their structure and prevent any potential damage or contamination.

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(SKU: 127468)

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